Vulnerabilities > CVE-2018-18281 - Incomplete Cleanup vulnerability in multiple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-0831.NASL description An update for kernel-alt 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-alt packages provide the Linux kernel version 4.x. Security Fix(es) : * kernel: lack of check for mmap minimum address in expand_downwards in mm/ mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms (CVE-2019-9213) * kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ ucma.c (CVE-2018-14734) * kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks (CVE-2018-17972) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of service (CVE-2018-18386) * kernel: userfaultfd bypasses tmpfs file permissions (CVE-2018-18397) * kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053) * kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * Failed to boot with ftrace=function in kvm with 2vcpu (BZ#1501024) * [ALT-7.5][x86_64] perf test 63 - inet_pton fails on x86_64 (BZ#1518836) * BUG: potential out-of-bounds string access when forcing a SELinux label on a file (BZ#1595706) * stack out-of-bounds in smb{2,3}_create_lease_buf() on SMB2/SMB3 mounts (BZ# 1598757) * [ALT-7.6][KVM][PANIC] ltp/lite proc01 - Unable to handle kernel paging request at virtual address ffff7fe000200018 (BZ#1623193) * Kernel lock up due to read/write lock (BZ#1636261) * [RHEL-ALT] Fix potential Spectre v1 in tty code (BZ#1639679) * [Huawei AArch64 7.6 Bug] HNS3: Vlan on HNS3 NIC cannot communicate (BZ# 1639713) * [RHEL7.6-ALT][AWS] backport last seen 2020-06-01 modified 2020-06-02 plugin id 124257 published 2019-04-24 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/124257 title RHEL 7 : kernel-alt (RHSA-2019:0831) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Red Hat Security Advisory RHSA-2019:0831. The text # itself is copyright (C) Red Hat, Inc. # include("compat.inc"); if (description) { script_id(124257); script_version("1.7"); script_cvs_date("Date: 2020/01/24"); script_cve_id("CVE-2018-13053", "CVE-2018-13094", "CVE-2018-14734", "CVE-2018-17972", "CVE-2018-18281", "CVE-2018-18386", "CVE-2018-18397", "CVE-2019-9213"); script_xref(name:"RHSA", value:"2019:0831"); script_name(english:"RHEL 7 : kernel-alt (RHSA-2019:0831)"); script_summary(english:"Checks the rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Red Hat host is missing one or more security updates." ); script_set_attribute( attribute:"description", value: "An update for kernel-alt 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-alt packages provide the Linux kernel version 4.x. Security Fix(es) : * kernel: lack of check for mmap minimum address in expand_downwards in mm/ mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms (CVE-2019-9213) * kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ ucma.c (CVE-2018-14734) * kernel: Unprivileged users able to inspect kernel stacks of arbitrary tasks (CVE-2018-17972) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of service (CVE-2018-18386) * kernel: userfaultfd bypasses tmpfs file permissions (CVE-2018-18397) * kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053) * kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * Failed to boot with ftrace=function in kvm with 2vcpu (BZ#1501024) * [ALT-7.5][x86_64] perf test 63 - inet_pton fails on x86_64 (BZ#1518836) * BUG: potential out-of-bounds string access when forcing a SELinux label on a file (BZ#1595706) * stack out-of-bounds in smb{2,3}_create_lease_buf() on SMB2/SMB3 mounts (BZ# 1598757) * [ALT-7.6][KVM][PANIC] ltp/lite proc01 - Unable to handle kernel paging request at virtual address ffff7fe000200018 (BZ#1623193) * Kernel lock up due to read/write lock (BZ#1636261) * [RHEL-ALT] Fix potential Spectre v1 in tty code (BZ#1639679) * [Huawei AArch64 7.6 Bug] HNS3: Vlan on HNS3 NIC cannot communicate (BZ# 1639713) * [RHEL7.6-ALT][AWS] backport 'nvme: update timeout module parameter type' (BZ#1654958) * ignore STABLE_FLAG of rmap_item->address in rmap_walk_ksm (BZ#1663565) * RHEL-Alt-7.6 - kernel: zcrypt: fix specification exception on z196 at ap probe (BZ#1670018) * [Huawei AArch64 7.6 Bug] Flock over NFSv3 failed (BZ#1670650) * [Huawei AArch64 7.6/7.6-z Bug] HNS3: if a single transmit packet(skb) has more than 8 frags, will cause the NIC to be unavailable (BZ#1677643) * krb5{,i,p} doesn't work with older enctypes on aarch64 (BZ#1678922) Users of kernel are advised to upgrade to these updated packages, which fix these bugs." ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:0831" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13053" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-13094" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-14734" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-17972" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-18281" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-18386" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2018-18397" ); script_set_attribute( attribute:"see_also", value:"https://access.redhat.com/security/cve/cve-2019-9213" ); script_set_attribute(attribute:"solution", value:"Update the affected packages."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:C"); script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Reliable Datagram Sockets (RDS) rds_atomic_free_op NULL pointer dereference Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-abi-whitelists"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common-s390x"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-doc"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:perf-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:python-perf-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:7"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/02"); script_set_attribute(attribute:"patch_publication_date", value:"2019/04/23"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/24"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Red Hat Local Security Checks"); script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl"); script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("misc_func.inc"); include("rpm.inc"); include("ksplice.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/RedHat/release"); if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat"); os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat"); os_ver = os_ver[1]; if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 7.x", "Red Hat " + os_ver); if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu); if (get_one_kb_item("Host/ksplice/kernel-cves")) { rm_kb_item(name:"Host/uptrack-uname-r"); cve_list = make_list("CVE-2018-13053", "CVE-2018-13094", "CVE-2018-14734", "CVE-2018-17972", "CVE-2018-18281", "CVE-2018-18386", "CVE-2018-18397", "CVE-2019-9213"); if (ksplice_cves_check(cve_list)) { audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for RHSA-2019:0831"); } else { __rpm_report = ksplice_reporting_text(); } } yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo"); if (!empty_or_null(yum_updateinfo)) { rhsa = "RHSA-2019:0831"; yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa); if (!empty_or_null(yum_report)) { security_report_v4( port : 0, severity : SECURITY_WARNING, extra : yum_report ); exit(0); } else { audit_message = "affected by Red Hat security advisory " + rhsa; audit(AUDIT_OS_NOT, audit_message); } } else { flag = 0; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", reference:"kernel-abi-whitelists-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debug-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debug-debuginfo-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debug-devel-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debuginfo-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-debuginfo-common-s390x-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-devel-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", reference:"kernel-doc-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-headers-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-kdump-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-kdump-debuginfo-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"kernel-kdump-devel-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"perf-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"perf-debuginfo-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"python-perf-4.14.0-115.7.1.el7a")) flag++; if (rpm_check(release:"RHEL7", cpu:"s390x", reference:"python-perf-debuginfo-4.14.0-115.7.1.el7a")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_WARNING, extra : rpm_report_get() + redhat_report_package_caveat() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-abi-whitelists / kernel-debug / etc"); } }NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3880-1.NASL description It was discovered that the CIFS client implementation in the Linux kernel did not properly handle setup negotiation during session recovery, leading to a NULL pointer exception. An attacker could use this to create a malicious CIFS server that caused a denial of service (client system crash). (CVE-2018-1066) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) It was discovered that the socket implementation in the Linux kernel contained a type confusion error that could lead to memory corruption. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-9568). 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 121598 published 2019-02-05 reporter Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121598 title Ubuntu 14.04 LTS : linux vulnerabilities (USN-3880-1) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Ubuntu Security Notice USN-3880-1. The text # itself is copyright (C) Canonical, Inc. See # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered # trademark of Canonical, Inc. # include("compat.inc"); if (description) { script_id(121598); script_version("1.4"); script_cvs_date("Date: 2019/09/18 12:31:49"); script_cve_id("CVE-2018-1066", "CVE-2018-17972", "CVE-2018-18281", "CVE-2018-9568"); script_xref(name:"USN", value:"3880-1"); script_name(english:"Ubuntu 14.04 LTS : linux vulnerabilities (USN-3880-1)"); script_summary(english:"Checks dpkg output for updated packages."); script_set_attribute( attribute:"synopsis", value: "The remote Ubuntu host is missing one or more security-related patches." ); script_set_attribute( attribute:"description", value: "It was discovered that the CIFS client implementation in the Linux kernel did not properly handle setup negotiation during session recovery, leading to a NULL pointer exception. An attacker could use this to create a malicious CIFS server that caused a denial of service (client system crash). (CVE-2018-1066) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) It was discovered that the socket implementation in the Linux kernel contained a type confusion error that could lead to memory corruption. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-9568). 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." ); script_set_attribute( attribute:"see_also", value:"https://usn.ubuntu.com/3880-1/" ); script_set_attribute(attribute:"solution", value:"Update the affected packages."); script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13-generic"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13-generic-lpae"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-3.13-lowlatency"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency"); script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04"); script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/02"); script_set_attribute(attribute:"patch_publication_date", value:"2019/02/04"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/02/05"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Ubuntu Local Security Checks"); script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl"); script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l"); exit(0); } include("audit.inc"); include("ubuntu.inc"); include("ksplice.inc"); if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/Ubuntu/release"); if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu"); release = chomp(release); if (! preg(pattern:"^(14\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04", "Ubuntu " + release); if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING); cpu = get_kb_item("Host/cpu"); if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH); if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu); if (get_one_kb_item("Host/ksplice/kernel-cves")) { rm_kb_item(name:"Host/uptrack-uname-r"); cve_list = make_list("CVE-2018-1066", "CVE-2018-17972", "CVE-2018-18281", "CVE-2018-9568"); if (ksplice_cves_check(cve_list)) { audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for USN-3880-1"); } else { _ubuntu_report = ksplice_reporting_text(); } } flag = 0; if (ubuntu_check(osver:"14.04", pkgname:"linux-image-3.13.0-165-generic", pkgver:"3.13.0-165.215")) flag++; if (ubuntu_check(osver:"14.04", pkgname:"linux-image-3.13.0-165-generic-lpae", pkgver:"3.13.0-165.215")) flag++; if (ubuntu_check(osver:"14.04", pkgname:"linux-image-3.13.0-165-lowlatency", pkgver:"3.13.0-165.215")) flag++; if (ubuntu_check(osver:"14.04", pkgname:"linux-image-generic", pkgver:"3.13.0.165.175")) flag++; if (ubuntu_check(osver:"14.04", pkgname:"linux-image-generic-lpae", pkgver:"3.13.0.165.175")) flag++; if (ubuntu_check(osver:"14.04", pkgname:"linux-image-lowlatency", pkgver:"3.13.0.165.175")) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : ubuntu_report_get() ); exit(0); } else { tested = ubuntu_pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "linux-image-3.13-generic / linux-image-3.13-generic-lpae / etc"); }NASL family Scientific Linux Local Security Checks NASL id SL_20190806_KERNEL_ON_SL7_X.NASL description Security Fix(es) : - Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900) - Kernel: page cache side channel attacks (CVE-2019-5489) - kernel: Buffer overflow in hidp_process_report (CVE-2018-9363) - kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() (CVE-2018-9517) - kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) - kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625) - kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ucma.c (CVE-2018-14734) - kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests (CVE-2018-15594) - kernel: TLB flush happens too late on mremap (CVE-2018-18281) - kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459) - kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460) - kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882) - kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) - kernel: a NULL pointer dereference in drivers/scsi/megaraid/megaraid_sas_base.c leading to DoS (CVE-2019-11810) - kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833) - kernel: Information exposure in fd_locked_ioctl function in drivers/block/floppy.c (CVE-2018-7755) - kernel: Memory leak in drivers/net/wireless/mac80211_hwsim.c:hwsim_new_radio_nl () can lead to potential denial of service (CVE-2018-8087) - kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/hid/hid-debug.c (CVE-2018-9516) - kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053) - kernel: NULL pointer dereference in lookup_slow function (CVE-2018-13093) - kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094) - kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c (CVE-2018-13095) - kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658) - kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885) - Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222) last seen 2020-03-18 modified 2019-08-27 plugin id 128226 published 2019-08-27 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/128226 title Scientific Linux Security Update : kernel on SL7.x x86_64 (20190806) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3835-1.NASL description Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) It was discovered that the BPF verifier in the Linux kernel did not correctly compute numeric bounds in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-18445) Daniel Dadap discovered that the module loading implementation in the Linux kernel did not properly enforce signed module loading when booted with UEFI Secure Boot in some situations. A local privileged attacker could use this to execute untrusted code in the kernel. (CVE-2018-18653) Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. (CVE-2018-18955) Philipp Wendler discovered that the overlayfs implementation in the Linux kernel did not properly verify the directory contents permissions from within a unprivileged user namespace. A local attacker could use this to expose sensitive information (protected file names). (CVE-2018-6559). 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 119338 published 2018-12-04 reporter Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119338 title Ubuntu 18.10 : linux, linux-gcp, linux-kvm, linux-raspi2 vulnerabilities (USN-3835-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3871-4.NASL description USN-3871-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 18.04 LTS for Ubuntu 16.04 LTS. Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876, CVE-2018-10879) Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877) Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878, CVE-2018-10882) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly ensure that xattr information remained in inode bodies. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10880) Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10883) It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information (host machine kernel memory). (CVE-2018-14625) Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use (nested KVM virtualization is not enabled by default in Ubuntu kernels). A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. (CVE-2018-16882) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) Wei Wu discovered that the KVM implementation in the Linux kernel did not properly ensure that ioapics were initialized. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-19407) It was discovered that the debug interface for the Linux kernel last seen 2020-03-18 modified 2019-02-05 plugin id 121594 published 2019-02-05 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121594 title Ubuntu 16.04 LTS : linux-hwe, linux-aws-hwe, linux-gcp vulnerabilities (USN-3871-4) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1244.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 flaw was found In the Linux kernel, through version 4.19.6, where a local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c. An attacker could corrupt memory and possibly escalate privileges if the attacker is able to have physical access to the system.i1/4^CVE-2018-19824i1/4%0 - It was found that the Linux kernel can hit a BUG_ON() statement in the __xfs_get_blocks() in the fs/xfs/xfs_aops.c because of a race condition between direct and memory-mapped I/O associated with a hole in a file that is handled with BUG_ON() instead of an I/O failure. This allows a local unprivileged attacker to cause a system crash and a denial of service.i1/4^CVE-2016-10741i1/4%0 - A division-by-zero in set_termios(), when debugging is enabled, was found in the Linux kernel. When the [io_ti] driver is loaded, a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash resulting in a denial of service.i1/4^CVE-2017-18360i1/4%0 - Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused.i1/4^CVE-2018-18281i1/4%0 - A use-after-free flaw can occur in the Linux kernel due to a race condition between packet_do_bind() and packet_notifier() functions called for an AF_PACKET socket. An unprivileged, local user could use this flaw to induce kernel memory corruption on the system, leading to an unresponsive system or to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.i1/4^CVE-2018-18559i1/4%0 Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-19 modified 2019-04-04 plugin id 123712 published 2019-04-04 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/123712 title EulerOS Virtualization 2.5.3 : kernel (EulerOS-SA-2019-1244) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0439-1.NASL description The SUSE Linux Enterprise 12 SP2 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-19985: The function hso_probe read if_num from the USB device (as an u8) and used it without a length check to index an array, resulting in an OOB memory read in hso_probe or hso_get_config_data that could be used by local attackers (bnc#1120743). CVE-2018-16884: NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out (bnc#1119946). CVE-2018-20169: The USB subsystem mishandled size checks during the reading of an extra descriptor, related to __usb_get_extra_descriptor in drivers/usb/core/usb.c (bnc#1119714). CVE-2018-9568: In sk_clone_lock of sock.c, there is a possible memory corruption due to type confusion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. (bnc#1118319). CVE-2018-16862: A security flaw was found in a way that the cleancache subsystem clears an inode after the final file truncation (removal). The new file created with the same inode may contain leftover pages from cleancache and the old file data instead of the new one (bnc#1117186). CVE-2018-19824: A local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c (bnc#1118152). CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. (bnc#1113769). CVE-2018-18710: 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 (bnc#1113751). CVE-2018-18690: A local attacker able to set attributes on an xfs filesystem could make this filesystem non-operational until the next mount by triggering an unchecked error condition during an xfs attribute change, because xfs_attr_shortform_addname in fs/xfs/libxfs/xfs_attr.c mishandled ATTR_REPLACE operations with conversion of an attr from short to long form (bnc#1105025). CVE-2018-18386: drivers/tty/n_tty.c allowed local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ (bnc#1094825). CVE-2018-9516: In hid_debug_events_read of drivers/hid/hid-debug.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. (bnc#1108498). CVE-2019-3459, CVE-2019-3460: The Blutooth stack suffered from two remote information leak vulnerabilities in the code that handles incoming L2cap configuration packets (bsc#1120758). 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 122343 published 2019-02-20 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/122343 title SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0439-1) NASL family SuSE Local Security Checks NASL id SUSE_SU-2018-3689-1.NASL description The SUSE Linux Enterprise 12 SP3 kernel was updated to 4.4.162 to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-14633: A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack-based buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target last seen 2020-06-01 modified 2020-06-02 plugin id 118882 published 2018-11-11 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/118882 title SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:3689-1) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2020-0179.NASL description An update for kernel is now available for Red Hat Enterprise Linux 7.6 Extended Update Support. 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) : * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * RHEL 7.7 RC1 - Host crashes about 4.5 hours into switch port bounce test (BZ#1763623) * [Azure][7.8] Include patch last seen 2020-06-01 modified 2020-06-02 plugin id 133164 published 2020-01-22 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/133164 title RHEL 7 : kernel (RHSA-2020:0179) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0224-1.NASL description The SUSE Linux Enterprise 15 kernel was updated to receive various security and bugfixes. This update brings following features : Support for Enhanced-IBRS on new Intel CPUs (fate#326564) The following security bugs were fixed: CVE-2018-9568: In sk_clone_lock of sock.c, there is a possible memory corruption due to type confusion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. (bnc#1118319). CVE-2018-12232: In net/socket.c there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat did not increment the file descriptor reference count, which allowed close to set the socket to NULL during fchownat last seen 2020-03-18 modified 2019-02-04 plugin id 121571 published 2019-02-04 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/121571 title SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:0224-1) NASL family Slackware Local Security Checks NASL id SLACKWARE_SSA_2019-030-01.NASL description New kernel packages are available for Slackware 14.2 to fix security issues. last seen 2020-03-17 modified 2019-01-31 plugin id 121505 published 2019-01-31 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/121505 title Slackware 14.2 : Slackware 14.2 kernel (SSA:2019-030-01) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1253.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 division-by-zero in set_termios(), when debugging is enabled, was found in the Linux kernel. When the [io_ti] driver is loaded, a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash resulting in a denial of service.i1/4^CVE-2017-18360i1/4%0 - A flaw was found In the Linux kernel, through version 4.19.6, where a local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c. An attacker could corrupt memory and possibly escalate privileges if the attacker is able to have physical access to the system.i1/4^CVE-2018-19824i1/4%0 - Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused.i1/4^CVE-2018-18281i1/4%0 - A use-after-free flaw can occur in the Linux kernel due to a race condition between packet_do_bind() and packet_notifier() functions called for an AF_PACKET socket. An unprivileged, local user could use this flaw to induce kernel memory corruption on the system, leading to an unresponsive system or to a crash. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.i1/4^CVE-2018-18559i1/4%0 Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-03-19 modified 2019-04-04 plugin id 123721 published 2019-04-04 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/123721 title EulerOS Virtualization 2.5.4 : kernel (EulerOS-SA-2019-1253) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-2043.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) : * Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900) * Kernel: page cache side channel attacks (CVE-2019-5489) * kernel: Buffer overflow in hidp_process_report (CVE-2018-9363) * kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() (CVE-2018-9517) * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) * kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625) * kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ ucma.c (CVE-2018-14734) * kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests (CVE-2018-15594) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459) * kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460) * kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) * kernel: a NULL pointer dereference in drivers/scsi/megaraid/ megaraid_sas_base.c leading to DoS (CVE-2019-11810) * kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833) * kernel: Information exposure in fd_locked_ioctl function in drivers/block/ floppy.c (CVE-2018-7755) * kernel: Memory leak in drivers/net/wireless/ mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of service (CVE-2018-8087) * kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/ hid/hid-debug.c (CVE-2018-9516) * kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053) * kernel: NULL pointer dereference in lookup_slow function (CVE-2018-13093) * kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094) * kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c (CVE-2018-13095) * kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658) * kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885) * Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section. last seen 2020-04-23 modified 2019-08-12 plugin id 127655 published 2019-08-12 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/127655 title RHEL 7 : kernel-rt (RHSA-2019:2043) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2020-5706.NASL description Description of changes: kernel-uek [3.8.13-118.46.1.el7uek] - ipv6: only static routes qualify for equal cost multipathing (Hannes Frederic Sowa) [Orabug: 30977687] {CVE-2013-4125} - USB: adutux: fix use-after-free on disconnect (Johan Hovold) [Orabug: 31240296] {CVE-2019-19523} - USB: core: Fix races in character device registration and deregistraion (Alan Stern) [Orabug: 31317668] {CVE-2019-19537} - USB: iowarrior: fix use-after-free on disconnect (Johan Hovold) [Orabug: 31351063] {CVE-2019-19528} - usb: iowarrior: fix deadlock on disconnect (Oliver Neukum) [Orabug: 31351063] {CVE-2019-19528} - mremap: properly flush TLB before releasing the page (Linus Torvalds) [Orabug: 31352012] {CVE-2018-18281} last seen 2020-06-10 modified 2020-06-05 plugin id 137172 published 2020-06-05 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/137172 title Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5706) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1131.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 division-by-zero in set_termios(), when debugging is enabled, was found in the Linux kernel. When the [io_ti] driver is loaded, a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash resulting in a denial of service. (CVE-2017-18360) - Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused.(CVE-2018-18281) - A flaw was discovered in the Linux kernel last seen 2020-05-06 modified 2019-04-02 plugin id 123605 published 2019-04-02 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/123605 title EulerOS 2.0 SP2 : kernel (EulerOS-SA-2019-1131) NASL family OracleVM Local Security Checks NASL id ORACLEVM_OVMSA-2020-0020.NASL description The remote OracleVM system is missing necessary patches to address critical security updates : - Input: ff-memless - kill timer in destroy (Oliver Neukum) [Orabug: 31213691] (CVE-2019-19524) - libertas: Fix two buffer overflows at parsing bss descriptor (Wen Huang) [Orabug: 31351307] (CVE-2019-14896) (CVE-2019-14897) (CVE-2019-14897) - binfmt_elf: use ELF_ET_DYN_BASE only for PIE (Kees Cook) [Orabug: 31352068] (CVE-2017-1000370) (CVE-2017-1000371) (CVE-2017-1000370) - NFSv4.0: Remove transport protocol name from non-UCS client ID (Chuck Lever) [Orabug: 31357212] - NFSv4.0: Remove cl_ipaddr from non-UCS client ID (Chuck Lever) - xen/manage: enable C_A_D to force reboot (Dongli Zhang) [Orabug: 31387466] - acpi: disable erst (Wengang Wang) [Orabug: 31194253] - mdio_bus: Fix use-after-free on device_register fails (YueHaibing) [Orabug: 31222292] (CVE-2019-12819) - rds: ib: Fix dysfunctional long address resolve timeout (Hakon Bugge) - vxlan: don last seen 2020-06-11 modified 2020-06-08 plugin id 137217 published 2020-06-08 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/137217 title OracleVM 3.4 : Unbreakable / etc (OVMSA-2020-0020) (Stack Clash) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3871-1.NASL description Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876, CVE-2018-10879) Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877) Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878, CVE-2018-10882) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly ensure that xattr information remained in inode bodies. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10880) Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10883) It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information (host machine kernel memory). (CVE-2018-14625) Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use (nested KVM virtualization is not enabled by default in Ubuntu kernels). A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. (CVE-2018-16882) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) Wei Wu discovered that the KVM implementation in the Linux kernel did not properly ensure that ioapics were initialized. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-19407) It was discovered that the debug interface for the Linux kernel last seen 2020-03-18 modified 2019-01-30 plugin id 121469 published 2019-01-30 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121469 title Ubuntu 18.04 LTS : linux vulnerabilities (USN-3871-1) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2020-5708.NASL description Description of changes: [4.1.12-124.39.5.el7uek] - Input: ff-memless - kill timer in destroy() (Oliver Neukum) [Orabug: 31213691] {CVE-2019-19524} - libertas: Fix two buffer overflows at parsing bss descriptor (Wen Huang) [Orabug: 31351307] {CVE-2019-14896} {CVE-2019-14897} {CVE-2019-14897} - binfmt_elf: use ELF_ET_DYN_BASE only for PIE (Kees Cook) [Orabug: 31352068] {CVE-2017-1000370} {CVE-2017-1000371} {CVE-2017-1000370} - NFSv4.0: Remove transport protocol name from non-UCS client ID (Chuck Lever) [Orabug: 31357212] - NFSv4.0: Remove cl_ipaddr from non-UCS client ID (Chuck Lever) [Orabug: 31357212] - xen/manage: enable C_A_D to force reboot (Dongli Zhang) [Orabug: 31387466] [4.1.12-124.39.4.el7uek] - acpi: disable erst (Wengang Wang) [Orabug: 31194253] - mdio_bus: Fix use-after-free on device_register fails (YueHaibing) [Orabug: 31222292] {CVE-2019-12819} - rds: ib: Fix dysfunctional long address resolve timeout (Hå kon Bugge) [Orabug: 31302708] - vxlan: dont migrate permanent fdb entries during learn (Roopa Prabhu) [Orabug: 31325318] - USB: iowarrior: fix use-after-free on disconnect (Johan Hovold) [Orabug: 31351061] {CVE-2019-19528} - usb: iowarrior: fix deadlock on disconnect (Oliver Neukum) [Orabug: 31351061] {CVE-2019-19528} - mremap: properly flush TLB before releasing the page (Linus Torvalds) [Orabug: 31352011] {CVE-2018-18281} [4.1.12-124.39.3.el7uek] - Input: add safety guards to input_set_keycode() (Dmitry Torokhov) [Orabug: 31200558] {CVE-2019-20636} - media: stv06xx: add missing descriptor sanity checks (Johan Hovold) [Orabug: 31200579] {CVE-2020-11609} - media: ov519: add missing endpoint sanity checks (Johan Hovold) [Orabug: 31213758] {CVE-2020-11608} - media: xirlink_cit: add missing descriptor sanity checks (Johan Hovold) [Orabug: 31213767] {CVE-2020-11668} - mwifiex: pcie: Fix memory leak in mwifiex_pcie_init_evt_ring (Navid Emamdoost) [Orabug: 31263147] {CVE-2019-19057} - USB: core: Fix races in character device registration and deregistraion (Alan Stern) [Orabug: 31317667] {CVE-2019-19537} last seen 2020-06-10 modified 2020-06-05 plugin id 137173 published 2020-06-05 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/137173 title Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2020-5708) (Stack Clash) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1715.NASL description Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2017-18249 A race condition was discovered in the disk space allocator of F2FS. A user with access to an F2FS volume could use this to cause a denial of service or other security impact. CVE-2018-1128, CVE-2018-1129 The cephx authentication protocol used by Ceph was susceptible to replay attacks, and calculated signatures incorrectly. These vulnerabilities in the server required changes to authentication that are incompatible with existing clients. The kernel last seen 2020-06-01 modified 2020-06-02 plugin id 122879 published 2019-03-18 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/122879 title Debian DLA-1715-1 : linux-4.9 security update (Spectre) NASL family SuSE Local Security Checks NASL id OPENSUSE-2018-1548.NASL description The openSUSE Leap 15.0 kernel was updated to 4.12.14-lp150.12.28.1 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. (bnc#1113769). The following non-security bugs were fixed : - ACPI / LPSS: Add alternative ACPI HIDs for Cherry Trail DMA controllers (bsc#1051510). - ACPI / platform: Add SMB0001 HID to forbidden_id_list (bsc#1051510). - ACPI / watchdog: Prefer iTCO_wdt always when WDAT table uses RTC SRAM (bsc#1051510). - ACPI/APEI: Handle GSIV and GPIO notification types (bsc#1115567). - ACPI/IORT: Fix iort_get_platform_device_domain() uninitialized pointer value (bsc#1051510). - ACPICA: Tables: Add WSMT support (bsc#1089350). - ALSA: ac97: Fix incorrect bit shift at AC97-SPSA control write (bsc#1051510). - ALSA: ca0106: Disable IZD on SB0570 DAC to fix audio pops (bsc#1051510). - ALSA: control: Fix race between adding and removing a user element (bsc#1051510). - ALSA: hda/ca0132 - Call pci_iounmap() instead of iounmap() (bsc#1051510). - ALSA: hda/realtek - Add GPIO data update helper (bsc#1051510). - ALSA: hda/realtek - Add auto-mute quirk for HP Spectre x360 laptop (bsc#1051510). - ALSA: hda/realtek - Allow skipping spec->init_amp detection (bsc#1051510). - ALSA: hda/realtek - Fix HP Headset Mic can last seen 2020-06-05 modified 2018-12-17 plugin id 119708 published 2018-12-17 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119708 title openSUSE Security Update : the Linux Kernel (openSUSE-2018-1548) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2020-0036.NASL description An update for kernel is now available for Red Hat Enterprise Linux 7.5 Extended Update Support. 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) : * kernel: Use-after-free in snd_pcm_info function in ALSA subsystem potentially leads to privilege escalation (CVE-2017-0861) * kernel: Handling of might_cancel queueing is not properly pretected against race (CVE-2017-10661) * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: a NULL pointer dereference in drivers/scsi/megaraid/ megaraid_sas_base.c leading to DoS (CVE-2019-11810) * kernel: use-after-free in drivers/char/ipmi/ipmi_si_intf.c, ipmi_si_mem_io.c, ipmi_si_port_io.c (CVE-2019-11811) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * Hard lockup in free_one_page()->_raw_spin_lock() because sosreport command is reading from /proc/pagetypeinfo (BZ#1770730) last seen 2020-06-01 modified 2020-06-02 plugin id 132700 published 2020-01-08 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132700 title RHEL 7 : kernel (RHSA-2020:0036) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-1289-1.NASL description The SUSE Linux Enterprise 12 SP1 LTSS kernel was updated to receive various security and bugfixes. Four new speculative execution information leak issues have been identified in Intel CPUs. (bsc#1111331) CVE-2018-12126: Microarchitectural Store Buffer Data Sampling (MSBDS) CVE-2018-12127: Microarchitectural Fill Buffer Data Sampling (MFBDS) CVE-2018-12130: Microarchitectural Load Port Data Samling (MLPDS) CVE-2019-11091: Microarchitectural Data Sampling Uncacheable Memory (MDSUM) This kernel update contains software mitigations for these issues, which also utilize CPU microcode updates shipped in parallel. For more information on this set of information leaks, check out https://www.suse.com/support/kb/doc/?id=7023736 The following security bugs were fixed: CVE-2016-10741: fs/xfs/xfs_aops.c allowed local users to cause a denial of service (system crash) because there is a race condition between direct and memory-mapped I/O (associated with a hole) that is handled with BUG_ON instead of an I/O failure (bnc#1114920 bnc#1124010). CVE-2017-1000407: By flooding the diagnostic port 0x80 an exception can be triggered leading to a kernel panic (bnc#1071021). CVE-2017-16533: The usbhid_parse function in drivers/hid/usbhid/hid-core.c allowed local users to cause a denial of service (out-of-bounds read and system crash) or possibly have unspecified other impact via a crafted USB device (bnc#1066674). CVE-2017-7273: The cp_report_fixup function in drivers/hid/hid-cypress.c allowed physically proximate attackers to cause a denial of service (integer underflow) or possibly have unspecified other impact via a crafted HID report (bnc#1031240). CVE-2017-7472: The KEYS subsystem allowed local users to cause a denial of service (memory consumption) via a series of KEY_REQKEY_DEFL_THREAD_KEYRING keyctl_set_reqkey_keyring calls (bnc#1034862). CVE-2018-14633: A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target last seen 2020-06-01 modified 2020-06-02 plugin id 125283 published 2019-05-20 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/125283 title SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1289-1) (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1731.NASL description The linux update issued as DLA-1731-1 caused a regression in the vmxnet3 (VMware virtual network adapter) driver. This update corrects that regression, and an earlier regression in the CIFS network filesystem implementation introduced in DLA-1422-1. For reference the original advisory text follows. Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks. CVE-2016-10741 A race condition was discovered in XFS that would result in a crash (BUG). A local user permitted to write to an XFS volume could use this for denial of service. CVE-2017-5753 Further instances of code that was vulnerable to Spectre variant 1 (bounds-check bypass) have been mitigated. CVE-2017-13305 A memory over-read was discovered in the keys subsystem last seen 2020-06-01 modified 2020-06-02 plugin id 123420 published 2019-03-28 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/123420 title Debian DLA-1731-2 : linux regression update (Spectre) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0180_KERNEL.NASL description The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has kernel packages installed that are affected by multiple vulnerabilities: - A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest. (CVE-2018-10853) - A flaw was found in the Linux Kernel where an attacker may be able to have an uncontrolled read to kernel- memory from within a vm guest. A race condition between connect() and close() function may allow an attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly intercept or corrupt AF_VSOCK messages destined to other clients. (CVE-2018-14625) - drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows ucma_leave_multicast to access a certain data structure after a cleanup step in ucma_process_join, which allows attackers to cause a denial of service (use-after-free). (CVE-2018-14734) - arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests. (CVE-2018-15594) - A flaw was found in the Linux kernel last seen 2020-05-08 modified 2019-10-15 plugin id 129900 published 2019-10-15 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/129900 title NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel Multiple Vulnerabilities (NS-SA-2019-0180) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-13937-1.NASL description The SUSE Linux Enterprise 12 SP3 kernel was updated to 3.0.101 to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-9516: In hid_debug_events_read of drivers/hid/hid-debug.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 (bnc#1108498). CVE-2018-19407: The vcpu_scan_ioapic function in arch/x86/kvm/x86.c allowed local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where ioapic is uninitialized (bnc#1116841). CVE-2018-19985: The function hso_probe read if_num from the USB device (as an u8) and used it without a length check to index an array, resulting in an OOB memory read in hso_probe or hso_get_config_data that could be used by local attackers (bnc#1120743). CVE-2018-20169: The USB subsystem mishandled size checks during the reading of an extra descriptor, related to __usb_get_extra_descriptor in drivers/usb/core/usb.c (bnc#1119714). CVE-2018-9568: In sk_clone_lock of sock.c, there is a possible memory corruption due to type confusion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1118319). CVE-2018-19824: A local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c (bnc#1118152). CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused (bnc#1113769). CVE-2018-18710: 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 (bnc#1113751). CVE-2018-18386: drivers/tty/n_tty.c allowed local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ (bnc#1094825). CVE-2017-7273: The cp_report_fixup function in drivers/hid/hid-cypress.c allowed physically proximate attackers to cause a denial of service (integer underflow) or possibly have unspecified other impact via a crafted HID report (bnc#1031240). CVE-2017-16533: The usbhid_parse function in drivers/hid/usbhid/hid-core.c allowed local users to cause a denial of service (out-of-bounds read and system crash) or possibly have unspecified other impact via a crafted USB device (bnc#1066674). CVE-2017-1000407: Fixed a denial of service, which was caused by flooding the diagnostic port 0x80 an exception leading to a kernel panic (bnc#1071021). 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 121468 published 2019-01-30 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121468 title SUSE SLES11 Security Update : kernel (SUSE-SU-2019:13937-1) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0253_KERNEL-RT.NASL description The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has kernel-rt packages installed that are affected by multiple vulnerabilities: - A flaw was found in the Linux kernel last seen 2020-05-08 modified 2019-12-31 plugin id 132495 published 2019-12-31 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/132495 title NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0253) NASL family SuSE Local Security Checks NASL id SUSE_SU-2018-4069-1.NASL description The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-19824: A local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c (bnc#1118152). CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removed entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry could remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. (bnc#1113769). CVE-2018-18710: 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 (bnc#1113751). CVE-2018-18445: Faulty computation of numeric bounds in the BPF verifier permitted out-of-bounds memory accesses because adjust_scalar_min_max_vals in kernel/bpf/verifier.c mishandled 32-bit right shifts (bnc#1112372). CVE-2018-18386: drivers/tty/n_tty.c allowed local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ (bnc#1094825). CVE-2017-18224: fs/ocfs2/aops.c omitted use of a semaphore and consequently had a race condition for access to the extent tree during read operations in DIRECT mode, which allowed local users to cause a denial of service (BUG) by modifying a certain e_cpos field (bnc#1084831). CVE-2017-16533: The usbhid_parse function in drivers/hid/usbhid/hid-core.c allowed local users to cause a denial of service (out-of-bounds read and system crash) or possibly have unspecified other impact via a crafted USB device (bnc#1066674). 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 119647 published 2018-12-13 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/119647 title SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:4069-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3832-1.NASL description Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) It was discovered that the BPF verifier in the Linux kernel did not correctly compute numeric bounds in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-18445) Daniel Dadap discovered that the module loading implementation in the Linux kernel did not properly enforce signed module loading when booted with UEFI Secure Boot in some situations. A local privileged attacker could use this to execute untrusted code in the kernel. (CVE-2018-18653) Jann Horn discovered that the Linux kernel mishandles mapping UID or GID ranges inside nested user namespaces in some situations. A local attacker could use this to bypass access controls on resources outside the namespace. (CVE-2018-18955) Philipp Wendler discovered that the overlayfs implementation in the Linux kernel did not properly verify the directory contents permissions from within a unprivileged user namespace. A local attacker could use this to expose sensitive information (protected file names). (CVE-2018-6559). 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 119302 published 2018-11-30 reporter Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119302 title Ubuntu 18.10 : linux-aws vulnerabilities (USN-3832-1) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1522.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 : - drivers/gpu/msm/kgsl.c in the MSM graphics driver (aka GPU driver) for the Linux kernel 3.x, as used in Qualcomm Innovation Center (QuIC) Android contributions for MSM devices and other products, mishandles the KGSL_MEMFLAGS_GPUREADONLY flag, which allows attackers to gain privileges by leveraging accidental read-write mappings, aka Qualcomm internal bug CR988993.(CVE-2016-2067i1/4%0 - Integer overflow in the mem_check_range function in drivers/infiniband/sw/rxe/rxe_mr.c in the Linux kernel before 4.9.10 allows local users to cause a denial of service (memory corruption), obtain sensitive information from kernel memory, or possibly have unspecified other impact via a write or read request involving the last seen 2020-03-19 modified 2019-05-14 plugin id 124975 published 2019-05-14 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/124975 title EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1522) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0222-1.NASL description The SUSE Linux Enterprise 12 SP4 kernel for Azure was updated to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-19407: The vcpu_scan_ioapic function in arch/x86/kvm/x86.c allowed local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where ioapic was uninitialized (bnc#1116841). CVE-2018-16884: NFS41+ shares mounted in different network namespaces at the same time can make bc_svc_process() use wrong back-channel IDs and cause a use-after-free vulnerability. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out (bnc#1119946). CVE-2018-20169: The USB subsystem mishandled size checks during the reading of an extra descriptor, related to __usb_get_extra_descriptor in drivers/usb/core/usb.c (bnc#1119714). CVE-2018-9568: In sk_clone_lock of sock.c, there is a possible memory corruption due to type confusion. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation (bnc#1118319). CVE-2018-16862: A security flaw was found in the way that the cleancache subsystem clears an inode after the final file truncation (removal). The new file created with the same inode may contain leftover pages from cleancache and the old file data instead of the new one (bnc#1117186). CVE-2018-14625: A flaw was found where an attacker may be able to have an uncontrolled read to kernel-memory from within a vm guest. A race condition between connect() and close() function may allow an attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly intercept or corrupt AF_VSOCK messages destined to other clients (bnc#1106615). CVE-2018-19985: The function hso_probe read if_num from the USB device (as an u8) and used it without a length check to index an array, resulting in an OOB memory read in hso_probe or hso_get_config_data that could be used by local attackers (bnc#1120743). CVE-2018-12232: In net/socket.c there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat did not increment the file descriptor reference count, which allowed close to set the socket to NULL during fchownat last seen 2020-03-18 modified 2019-02-04 plugin id 121569 published 2019-02-04 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/121569 title SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0222-1) (Spectre) NASL family SuSE Local Security Checks NASL id OPENSUSE-2018-1427.NASL description The openSUSE Leap 42.3 kernel was updated to 4.4.162 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. (bnc#1113769). - CVE-2018-18710: 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 (bnc#1113751). - CVE-2018-18690: A local attacker able to set attributes on an xfs filesystem could make this filesystem non-operational until the next mount by triggering an unchecked error condition during an xfs attribute change, because xfs_attr_shortform_addname in fs/xfs/libxfs/xfs_attr.c mishandled ATTR_REPLACE operations with conversion of an attr from short to long form (bnc#1105025). - CVE-2018-18386: drivers/tty/n_tty.c allowed local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ (bnc#1094825). - CVE-2018-9516: A lack of certain checks in the hid_debug_events_read() function in the drivers/hid/hid-debug.c file might have resulted in receiving userspace buffer overflow and an out-of-bounds write or to the infinite loop. (bnc#1108498). The following non-security bugs were fixed : - 6lowpan: iphc: reset mac_header after decompress to fix panic (bnc#1012382). - Add azure kernel description. - Add bug reference to patches.suse/x86-entry-64-use-a-per-cpu-trampoline-stack -fix1.patch - Add graphviz to buildreq for image conversion - Add reference to bsc#1104124 to patches.fixes/fs-aio-fix-the-increment-of-aio-nr-and-cou nting-agai.patch - ALSA: hda: Add AZX_DCAPS_PM_RUNTIME for AMD Raven Ridge (bnc#1012382). - ALSA: hda/realtek - Cannot adjust speaker last seen 2020-06-05 modified 2018-11-21 plugin id 119077 published 2018-11-21 reporter This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/119077 title openSUSE Security Update : the Linux Kernel (openSUSE-2018-1427) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1076.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 security flaw was found in the ip_frag_reasm() function in net/ipv4/ip_fragment.c in the Linux kernel which can cause a later system crash in ip_do_fragment(). With certain non-default, but non-rare, configuration of a victim host, an attacker can trigger this crash remotely, thus leading to a remote denial of service.(CVE-2018-14641) - A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a denial of service on the system.(CVE-2018-5391) - The resv_map_release function in mm/hugetlb.c in the Linux kernel, through 4.15.7, allows local users to cause a denial of service (BUG) via a crafted application that makes mmap system calls and has a large pgoff argument to the remap_file_pages system call. (CVE-2018-7740) - A use-after-free vulnerability was found in the way the Linux kernel last seen 2020-05-06 modified 2019-03-08 plugin id 122699 published 2019-03-08 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/122699 title EulerOS 2.0 SP5 : kernel (EulerOS-SA-2019-1076) NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2019-2029.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) : * Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900) * Kernel: page cache side channel attacks (CVE-2019-5489) * kernel: Buffer overflow in hidp_process_report (CVE-2018-9363) * kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() (CVE-2018-9517) * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) * kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625) * kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ ucma.c (CVE-2018-14734) * kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests (CVE-2018-15594) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459) * kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460) * kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) * kernel: a NULL pointer dereference in drivers/scsi/megaraid/ megaraid_sas_base.c leading to DoS (CVE-2019-11810) * kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833) * kernel: Information exposure in fd_locked_ioctl function in drivers/block/ floppy.c (CVE-2018-7755) * kernel: Memory leak in drivers/net/wireless/ mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of service (CVE-2018-8087) * kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/ hid/hid-debug.c (CVE-2018-9516) * kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053) * kernel: NULL pointer dereference in lookup_slow function (CVE-2018-13093) * kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094) * kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c (CVE-2018-13095) * kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658) * kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885) * Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section. last seen 2020-04-16 modified 2019-09-11 plugin id 128651 published 2019-09-11 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/128651 title CentOS 7 : kernel (CESA-2019:2029) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3871-2.NASL description USN-3871-1 fixed vulnerabilities in the Linux kernel for Ubuntu 18.04 LTS. Unfortunately, that update introduced regressions with docking station displays and mounting ext4 file systems with the meta_bg option enabled. This update fixes the problems. We apologize for the inconvenience. Original advisory details : Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876, CVE-2018-10879) Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877) Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878, CVE-2018-10882) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly ensure that xattr information remained in inode bodies. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10880) Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10883) It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information (host machine kernel memory). (CVE-2018-14625) Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use (nested KVM virtualization is not enabled by default in Ubuntu kernels). A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. (CVE-2018-16882) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) Wei Wu discovered that the KVM implementation in the Linux kernel did not properly ensure that ioapics were initialized. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-19407) It was discovered that the debug interface for the Linux kernel last seen 2020-03-18 modified 2019-02-05 plugin id 121592 published 2019-02-05 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121592 title Ubuntu 18.04 LTS : linux regression (USN-3871-2) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2020-0103.NASL description An update for kernel is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. 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) : * kernel: Use-after-free in __blk_drain_queue() function in block/blk-core.c (CVE-2018-20856) * Kernel: KVM: potential use-after-free via kvm_ioctl_create_device() (CVE-2019-6974) * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * guest softlockup in mem_cgroup_reparent_charges with 800GB guests (BZ# 1770111) * [RHEL7.7] Refined TSC clocksource calibration occasionally fails on some SkyLake-X servers (BZ#1775682) last seen 2020-06-01 modified 2020-06-02 plugin id 132886 published 2020-01-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132886 title RHEL 7 : kernel (RHSA-2020:0103) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2019-2029.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) : * Kernel: vhost_net: infinite loop while receiving packets leads to DoS (CVE-2019-3900) * Kernel: page cache side channel attacks (CVE-2019-5489) * kernel: Buffer overflow in hidp_process_report (CVE-2018-9363) * kernel: l2tp: Race condition between pppol2tp_session_create() and l2tp_eth_create() (CVE-2018-9517) * kernel: kvm: guest userspace to guest kernel write (CVE-2018-10853) * kernel: use-after-free Read in vhost_transport_send_pkt (CVE-2018-14625) * kernel: use-after-free in ucma_leave_multicast in drivers/infiniband/core/ ucma.c (CVE-2018-14734) * kernel: Mishandling of indirect calls weakens Spectre mitigation for paravirtual guests (CVE-2018-15594) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: Heap address information leak while using L2CAP_GET_CONF_OPT (CVE-2019-3459) * kernel: Heap address information leak while using L2CAP_PARSE_CONF_RSP (CVE-2019-3460) * kernel: denial of service vector through vfio DMA mappings (CVE-2019-3882) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) * kernel: a NULL pointer dereference in drivers/scsi/megaraid/ megaraid_sas_base.c leading to DoS (CVE-2019-11810) * kernel: fs/ext4/extents.c leads to information disclosure (CVE-2019-11833) * kernel: Information exposure in fd_locked_ioctl function in drivers/block/ floppy.c (CVE-2018-7755) * kernel: Memory leak in drivers/net/wireless/ mac80211_hwsim.c:hwsim_new_radio_nl() can lead to potential denial of service (CVE-2018-8087) * kernel: HID: debug: Buffer overflow in hid_debug_events_read() in drivers/ hid/hid-debug.c (CVE-2018-9516) * kernel: Integer overflow in the alarm_timer_nsleep function (CVE-2018-13053) * kernel: NULL pointer dereference in lookup_slow function (CVE-2018-13093) * kernel: NULL pointer dereference in xfs_da_shrink_inode function (CVE-2018-13094) * kernel: NULL pointer dereference in fs/xfs/libxfs/xfs_inode_buf.c (CVE-2018-13095) * kernel: Information leak in cdrom_ioctl_drive_status (CVE-2018-16658) * kernel: out-of-bound read in memcpy_fromiovecend() (CVE-2018-16885) * Kernel: KVM: leak of uninitialized stack contents to guest (CVE-2019-7222) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes : For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section. last seen 2020-04-16 modified 2019-08-12 plugin id 127650 published 2019-08-12 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/127650 title RHEL 7 : kernel (RHSA-2019:2029) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1512.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 : - In the Linux kernel through 4.14.13, the rds_message_alloc_sgs() function does not validate a value that is used during DMA page allocation, leading to a heap-based out-of-bounds write (related to the rds_rdma_extra_size() function in last seen 2020-06-01 modified 2020-06-02 plugin id 124834 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/124834 title EulerOS Virtualization 3.0.1.0 : kernel (EulerOS-SA-2019-1512) NASL family SuSE Local Security Checks NASL id OPENSUSE-2019-974.NASL description The openSUSE Leap 15.0 kernel was updated to 4.12.14-lp150.12.28.1 to receive various security and bugfixes. The following security bugs were fixed : - CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. (bnc#1113769). The following non-security bugs were fixed : - ACPI / LPSS: Add alternative ACPI HIDs for Cherry Trail DMA controllers (bsc#1051510). - ACPI / platform: Add SMB0001 HID to forbidden_id_list (bsc#1051510). - ACPI / watchdog: Prefer iTCO_wdt always when WDAT table uses RTC SRAM (bsc#1051510). - ACPI/APEI: Handle GSIV and GPIO notification types (bsc#1115567). - ACPI/IORT: Fix iort_get_platform_device_domain() uninitialized pointer value (bsc#1051510). - ACPICA: Tables: Add WSMT support (bsc#1089350). - ALSA: ac97: Fix incorrect bit shift at AC97-SPSA control write (bsc#1051510). - ALSA: ca0106: Disable IZD on SB0570 DAC to fix audio pops (bsc#1051510). - ALSA: control: Fix race between adding and removing a user element (bsc#1051510). - ALSA: hda/ca0132 - Call pci_iounmap() instead of iounmap() (bsc#1051510). - ALSA: hda/realtek - Add GPIO data update helper (bsc#1051510). - ALSA: hda/realtek - Add auto-mute quirk for HP Spectre x360 laptop (bsc#1051510). - ALSA: hda/realtek - Allow skipping spec->init_amp detection (bsc#1051510). - ALSA: hda/realtek - Fix HP Headset Mic can last seen 2020-06-01 modified 2020-06-02 plugin id 123397 published 2019-03-27 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123397 title openSUSE Security Update : the Linux Kernel (openSUSE-2019-974) NASL family SuSE Local Security Checks NASL id SUSE_SU-2019-0095-1.NASL description The SUSE Linux Enterprise 12 SP3 Azure kernel was updated to 4.4.162 to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-18281: The mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. (bnc#1113769). CVE-2018-18710: 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 (bnc#1113751). CVE-2018-18690: A local attacker able to set attributes on an xfs filesystem could make this filesystem non-operational until the next mount by triggering an unchecked error condition during an xfs attribute change, because xfs_attr_shortform_addname in fs/xfs/libxfs/xfs_attr.c mishandled ATTR_REPLACE operations with conversion of an attr from short to long form (bnc#1105025). CVE-2018-18386: drivers/tty/n_tty.c allowed local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ (bnc#1094825). CVE-2018-9516: In hid_debug_events_read of drivers/hid/hid-debug.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. (bnc#1108498). CVE-2018-14633: A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack-based buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target last seen 2020-03-18 modified 2019-01-16 plugin id 121208 published 2019-01-16 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/121208 title SUSE SLES12 Security Update : kernel (SUSE-SU-2019:0095-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3871-3.NASL description Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876, CVE-2018-10879) Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877) Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878, CVE-2018-10882) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly ensure that xattr information remained in inode bodies. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10880) Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10883) It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information (host machine kernel memory). (CVE-2018-14625) Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use (nested KVM virtualization is not enabled by default in Ubuntu kernels). A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. (CVE-2018-16882) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) Wei Wu discovered that the KVM implementation in the Linux kernel did not properly ensure that ioapics were initialized. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-19407) It was discovered that the debug interface for the Linux kernel last seen 2020-03-18 modified 2019-02-05 plugin id 121593 published 2019-02-05 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121593 title Ubuntu 18.04 LTS : linux-aws, linux-gcp, linux-kvm, linux-oem, linux-raspi2 vulnerabilities (USN-3871-3) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0183_KERNEL-RT.NASL description The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has kernel-rt packages installed that are affected by multiple vulnerabilities: - A flaw was found in the way Linux kernel KVM hypervisor before 4.18 emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest. (CVE-2018-10853) - A flaw was found in the Linux Kernel where an attacker may be able to have an uncontrolled read to kernel- memory from within a vm guest. A race condition between connect() and close() function may allow an attacker using the AF_VSOCK protocol to gather a 4 byte information leak or possibly intercept or corrupt AF_VSOCK messages destined to other clients. (CVE-2018-14625) - drivers/infiniband/core/ucma.c in the Linux kernel through 4.17.11 allows ucma_leave_multicast to access a certain data structure after a cleanup step in ucma_process_join, which allows attackers to cause a denial of service (use-after-free). (CVE-2018-14734) - arch/x86/kernel/paravirt.c in the Linux kernel before 4.18.1 mishandles certain indirect calls, which makes it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests. (CVE-2018-15594) - A flaw was found in the Linux kernel last seen 2020-05-08 modified 2019-10-15 plugin id 129920 published 2019-10-15 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/129920 title NewStart CGSL CORE 5.04 / MAIN 5.04 : kernel-rt Multiple Vulnerabilities (NS-SA-2019-0183) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2020-0100.NASL description An update for kernel-rt is now available for Red Hat Enterprise MRG 2. 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) : * kernel: Use-after-free in __blk_drain_queue() function in block/blk-core.c (CVE-2018-20856) * kernel: TLB flush happens too late on mremap (CVE-2018-18281) * kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping (CVE-2019-11599) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es) : * update the MRG 2.5.z 3.10 realtime-kernel sources (BZ#1779367) last seen 2020-06-01 modified 2020-06-02 plugin id 132947 published 2020-01-16 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132947 title RHEL 6 : kernel-rt (RHSA-2020:0100) NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0247_KERNEL.NASL description The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has kernel packages installed that are affected by multiple vulnerabilities: - A flaw was found in the Linux kernel last seen 2020-05-08 modified 2019-12-31 plugin id 132474 published 2019-12-31 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/132474 title NewStart CGSL CORE 5.05 / MAIN 5.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0247) NASL family Huawei Local Security Checks NASL id EULEROS_SA-2019-1108.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 flaw was discovered in the Linux kernel last seen 2020-05-06 modified 2019-03-26 plugin id 123121 published 2019-03-26 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/123121 title EulerOS 2.0 SP3 : kernel (EulerOS-SA-2019-1108) NASL family SuSE Local Security Checks NASL id SUSE_SU-2018-3746-1.NASL description The SUSE Linux Enterprise 11 SP4 kernel was updated to 3.0.101-108.81 to receive various security and bugfixes. The following security bugs were fixed : CVE-2018-18281: An issue was discovered in the Linux kernel, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused (bnc#1113769). CVE-2018-18710: An issue was discovered in the Linux kernel, 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 (bnc#1113751). CVE-2018-18386: drivers/tty/n_tty.c in the Linux kernel allowed local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ (bnc#1094825). CVE-2017-7273: The cp_report_fixup function in drivers/hid/hid-cypress.c in the Linux kernel 4.x allowed physically proximate attackers to cause a denial of service (integer underflow) or possibly have unspecified other impact via a crafted HID report (bnc#1031240). CVE-2017-16533: The usbhid_parse function in drivers/hid/usbhid/hid-core.c in the Linux kernel allowed local users to cause a denial of service (out-of-bounds read and system crash) or possibly have unspecified other impact via a crafted USB device (bnc#1066674). CVE-2017-1000407: An denial of service issue was discovered in the Linux kernel, by flooding the diagnostic port 0x80 an exception can be triggered leading to a kernel panic (bnc#1071021). CVE-2018-9516: An issue was discovered in the Linux kernel, the copy_to_user() inside the HID code does not correctly check the length before executing (bsc#1108498). CVE-2018-14633: A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target last seen 2020-06-01 modified 2020-06-02 plugin id 118952 published 2018-11-14 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/118952 title SUSE SLES11 Security Update : kernel (SUSE-SU-2018:3746-1) NASL family Ubuntu Local Security Checks NASL id UBUNTU_USN-3871-5.NASL description Wen Xu discovered that a use-after-free vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10876, CVE-2018-10879) Wen Xu discovered that a buffer overflow existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10877) Wen Xu discovered that an out-of-bounds write vulnerability existed in the ext4 filesystem implementation in the Linux kernel. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-10878, CVE-2018-10882) Wen Xu discovered that the ext4 filesystem implementation in the Linux kernel did not properly ensure that xattr information remained in inode bodies. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10880) Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service (system crash). (CVE-2018-10883) It was discovered that a race condition existed in the vsock address family implementation of the Linux kernel that could lead to a use-after-free condition. A local attacker in a guest virtual machine could use this to expose sensitive information (host machine kernel memory). (CVE-2018-14625) Cfir Cohen discovered that a use-after-free vulnerability existed in the KVM implementation of the Linux kernel, when handling interrupts in environments where nested virtualization is in use (nested KVM virtualization is not enabled by default in Ubuntu kernels). A local attacker in a guest VM could possibly use this to gain administrative privileges in a host machine. (CVE-2018-16882) Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. (CVE-2018-17972) Jann Horn discovered that the mremap() system call in the Linux kernel did not properly flush the TLB when completing, potentially leaving access to a physical page after it has been released to the page allocator. A local attacker could use this to cause a denial of service (system crash), expose sensitive information, or possibly execute arbitrary code. (CVE-2018-18281) Wei Wu discovered that the KVM implementation in the Linux kernel did not properly ensure that ioapics were initialized. A local attacker could use this to cause a denial of service (system crash). (CVE-2018-19407) It was discovered that the debug interface for the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 122052 published 2019-02-08 reporter Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/122052 title Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : linux-azure vulnerabilities (USN-3871-5)
Packetstorm
| data source | https://packetstormsecurity.com/files/download/150001/GS20181029202705.txt |
| id | PACKETSTORM:150001 |
| last seen | 2018-10-30 |
| published | 2018-10-29 |
| reporter | Jann Horn |
| source | https://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html |
| title | Linux mremap() TLB Flush Too Late |
Redhat
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| rpms |
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References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=eb66ae030829605d61fbef1909ce310e29f78821
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.135
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.16
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.78
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1695
- http://www.openwall.com/lists/oss-security/2018/10/29/5
- http://packetstormsecurity.com/files/150001/Linux-mremap-TLB-Flush-Too-Late.html
- http://www.securityfocus.com/bid/105761
- https://usn.ubuntu.com/3832-1/
- https://usn.ubuntu.com/3835-1/
- http://www.securityfocus.com/bid/106503
- https://usn.ubuntu.com/3871-1/
- https://usn.ubuntu.com/3880-2/
- https://usn.ubuntu.com/3871-4/
- https://usn.ubuntu.com/3871-3/
- https://usn.ubuntu.com/3880-1/
- https://usn.ubuntu.com/3871-5/
- https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://access.redhat.com/errata/RHSA-2019:0831
- https://access.redhat.com/errata/RHSA-2019:2043
- https://access.redhat.com/errata/RHSA-2019:2029
- https://access.redhat.com/errata/RHSA-2020:0036
- https://access.redhat.com/errata/RHSA-2020:0100
- https://access.redhat.com/errata/RHSA-2020:0103
- https://access.redhat.com/errata/RHSA-2020:0179