Vulnerabilities > CVE-2018-10901
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.
Vulnerable Configurations
Nessus
NASL family Amazon Linux Local Security Checks NASL id ALA_ALAS-2018-1023.NASL description A weakness was found in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 110197 published 2018-05-30 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/110197 title Amazon Linux AMI : kernel (ALAS-2018-1023) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from Amazon Linux AMI Security Advisory ALAS-2018-1023. # include("compat.inc"); if (description) { script_id(110197); script_version("1.7"); script_cvs_date("Date: 2019/07/10 16:04:12"); script_cve_id("CVE-2017-13215", "CVE-2017-16939", "CVE-2018-1000199", "CVE-2018-10675", "CVE-2018-1068", "CVE-2018-1087", "CVE-2018-10901", "CVE-2018-1091", "CVE-2018-1108", "CVE-2018-7995", "CVE-2018-8897"); script_xref(name:"ALAS", value:"2018-1023"); script_name(english:"Amazon Linux AMI : kernel (ALAS-2018-1023)"); script_summary(english:"Checks rpm output for the updated packages"); script_set_attribute( attribute:"synopsis", value:"The remote Amazon Linux AMI host is missing a security update." ); script_set_attribute( attribute:"description", value: "A weakness was found in the Linux kernel's implementation of random seed data. Programs, early in the boot sequence, could use the data allocated for the seed before it was sufficiently generated. (CVE-2018-1108) A flaw was found in the way the Linux kernel handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged system user could use this flaw to crash the system kernel resulting in the denial of service. (CVE-2018-8897) A flaw was found in the Linux kernel's implementation of 32-bit syscall interface for bridging. This allowed a privileged user to arbitrarily write to a limited range of kernel memory. (CVE-2018-1068) The Linux kernel is vulerable to a use-after-free flaw when Transformation User configuration interface(CONFIG_XFRM_USER) compile-time configuration were enabled. This vulnerability occurs while closing a xfrm netlink socket in xfrm_dump_policy_done. A user/process could abuse this flaw to potentially escalate their privileges on a system. (CVE-2017-16939) A flaw was found in the Linux kernel where a crash can be triggered from unprivileged userspace during core dump on a POWER system with a certain configuration. This is due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path leading to a denial of service.(CVE-2018-1091) An address corruption flaw was discovered in the Linux kernel built with hardware breakpoint (CONFIG_HAVE_HW_BREAKPOINT) support. While modifying a h/w breakpoint via 'modify_user_hw_breakpoint' routine, an unprivileged user/process could use this flaw to crash the system kernel resulting in DoS OR to potentially escalate privileges on a the system.(CVE-2018-1000199) A flaw was found in the way the Linux kernel's KVM hypervisor handled exceptions delivered after a stack switch operation via Mov SS or Pop SS instructions. During the stack switch operation, the processor did not deliver interrupts and exceptions, rather they are delivered once the first instruction after the stack switch is executed. An unprivileged KVM guest user could use this flaw to crash the guest or, potentially, escalate their privileges in the guest.(CVE-2018-1087) A flaw was found in the Linux kernel's skcipher component, which affects the skcipher_recvmsg function. Attackers using a specific input can lead to a privilege escalation.(CVE-2017-13215) The do_get_mempolicy() function in mm/mempolicy.c in the Linux kernel allows local users to hit a use-after-free bug via crafted system calls and thus cause a denial of service (DoS) or possibly have unspecified other impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out.(CVE-2018-10675) A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.(CVE-2018-10901) A race condition in the store_int_with_restart() function in arch/x86/kernel/cpu/mcheck/mce.c in the Linux kernel allows local users to cause a denial of service (panic) by leveraging root access to write to the check_interval file in a /sys/devices/system/machinecheck/machinecheck<cpu number> directory. (CVE-2018-7995)" ); script_set_attribute( attribute:"see_also", value:"https://alas.aws.amazon.com/ALAS-2018-1023.html" ); script_set_attribute( attribute:"solution", value: "Run 'yum update kernel' then reboot the instance to update your system." ); 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:H/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:H/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:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'Microsoft Windows POP/MOV SS Local Privilege Elevation Vulnerability'); 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:amazon:linux:kernel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-i686"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-headers"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-debuginfo"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-devel"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf"); script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf-debuginfo"); script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux"); script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/24"); script_set_attribute(attribute:"patch_publication_date", value:"2019/01/25"); script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/30"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"Amazon Linux Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/AmazonLinux/release"); if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux"); os_ver = pregmatch(pattern: "^AL(A|\d)", string:release); if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux"); os_ver = os_ver[1]; if (os_ver != "A") { if (os_ver == 'A') os_ver = 'AMI'; audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver); } if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (rpm_check(release:"ALA", reference:"kernel-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"kernel-debuginfo-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", cpu:"i686", reference:"kernel-debuginfo-common-i686-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", cpu:"x86_64", reference:"kernel-debuginfo-common-x86_64-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"kernel-devel-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"kernel-headers-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"kernel-tools-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"kernel-tools-debuginfo-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"kernel-tools-devel-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"perf-4.14.42-52.37.amzn1")) flag++; if (rpm_check(release:"ALA", reference:"perf-debuginfo-4.14.42-52.37.amzn1")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get()); else security_hole(0); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-debuginfo / kernel-debuginfo-common-i686 / etc"); }
NASL family NewStart CGSL Local Security Checks NASL id NEWSTART_CGSL_NS-SA-2019-0143_KERNEL.NASL description The remote NewStart CGSL host, running version MAIN 4.05, has kernel packages installed that are affected by multiple vulnerabilities: - A flaw was found in the Linux kernel last seen 2020-03-18 modified 2019-08-12 plugin id 127408 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/127408 title NewStart CGSL MAIN 4.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0143) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from ZTE advisory NS-SA-2019-0143. The text # itself is copyright (C) ZTE, Inc. include('compat.inc'); if (description) { script_id(127408); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/20"); script_cve_id( "CVE-2016-9555", "CVE-2017-5753", "CVE-2017-5754", "CVE-2017-7308", "CVE-2017-8824", "CVE-2017-13166", "CVE-2017-1000112", "CVE-2018-3639", "CVE-2018-3693", "CVE-2018-5390", "CVE-2018-5391", "CVE-2018-10675", "CVE-2018-10901", "CVE-2018-14634" ); script_bugtraq_id( 102371, 102378, 104976, 105407, 106128 ); script_name(english:"NewStart CGSL MAIN 4.05 : kernel Multiple Vulnerabilities (NS-SA-2019-0143)"); script_set_attribute(attribute:"synopsis", value: "The remote machine is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote NewStart CGSL host, running version MAIN 4.05, has kernel packages installed that are affected by multiple vulnerabilities: - A flaw was found in the Linux kernel's implementation of the SCTP protocol. A remote attacker could trigger an out-of-bounds read with an offset of up to 64kB potentially causing the system to crash. (CVE-2016-9555) - An exploitable memory corruption flaw was found in the Linux kernel. The append path can be erroneously switched from UFO to non-UFO in ip_ufo_append_data() when building an UFO packet with MSG_MORE option. If unprivileged user namespaces are available, this flaw can be exploited to gain root privileges. (CVE-2017-1000112) - A bug in the 32-bit compatibility layer of the ioctl handling code of the v4l2 video driver in the Linux kernel has been found. A memory protection mechanism ensuring that user-provided buffers always point to a userspace memory were disabled, allowing destination address to be in a kernel space. This flaw could be exploited by an attacker to overwrite a kernel memory from an unprivileged userspace process, leading to privilege escalation. (CVE-2017-13166) - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5753 triggers the speculative execution by performing a bounds-check bypass. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall boundary and read privileged memory by conducting targeted cache side- channel attacks. (CVE-2017-5753) - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5754 relies on the fact that, on impacted microprocessors, during speculative execution of instruction permission faults, exception generation triggered by a faulting access is suppressed until the retirement of the whole instruction block. In a combination with the fact that memory accesses may populate the cache even when the block is being dropped and never committed (executed), an unprivileged local attacker could use this flaw to read privileged (kernel space) memory by conducting targeted cache side-channel attacks. Note: CVE-2017-5754 affects Intel x86-64 microprocessors. AMD x86-64 microprocessors are not affected by this issue. (CVE-2017-5754) - It was found that the packet_set_ring() function of the Linux kernel's networking implementation did not properly validate certain block-size data. A local attacker with CAP_NET_RAW capability could use this flaw to trigger a buffer overflow resulting in a system crash or a privilege escalation. (CVE-2017-7308) - A use-after-free vulnerability was found in DCCP socket code affecting the Linux kernel since 2.6.16. This vulnerability could allow an attacker to their escalate privileges. (CVE-2017-8824) - The do_get_mempolicy() function in mm/mempolicy.c in the Linux kernel allows local users to hit a use-after-free bug via crafted system calls and thus cause a denial of service (DoS) or possibly have unspecified other impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out. (CVE-2018-10675) - A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges. (CVE-2018-10901) - An integer overflow flaw was found in the Linux kernel's create_elf_tables() function. An unprivileged local user with access to SUID (or otherwise privileged) binary could use this flaw to escalate their privileges on the system. (CVE-2018-14634) - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639) - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to influence speculative execution and/or read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3693) - A flaw named SegmentSmack was found in the way the Linux kernel handled specially crafted TCP packets. A remote attacker could use this flaw to trigger time and calculation expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() functions by sending specially modified packets within ongoing TCP sessions which could lead to a CPU saturation and hence a denial of service on the system. Maintaining the denial of service condition requires continuous two-way TCP sessions to a reachable open port, thus the attacks cannot be performed using spoofed IP addresses. (CVE-2018-5390) - 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) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number."); script_set_attribute(attribute:"see_also", value:"http://security.gd-linux.com/notice/NS-SA-2019-0143"); script_set_attribute(attribute:"solution", value: "Upgrade the vulnerable CGSL kernel packages. Note that updated packages may not be available yet. Please contact ZTE for more information."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C"); script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"); script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-9555"); script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available"); script_set_attribute(attribute:"exploit_available", value:"true"); script_set_attribute(attribute:"exploit_framework_core", value:"true"); script_set_attribute(attribute:"exploited_by_malware", value:"true"); script_set_attribute(attribute:"metasploit_name", value:'AF_PACKET packet_set_ring Privilege Escalation'); script_set_attribute(attribute:"exploit_framework_metasploit", value:"true"); script_set_attribute(attribute:"exploit_framework_canvas", value:"true"); script_set_attribute(attribute:"canvas_package", value:'CANVAS'); script_set_attribute(attribute:"vuln_publication_date", value:"2016/11/28"); script_set_attribute(attribute:"patch_publication_date", value:"2019/07/17"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12"); script_set_attribute(attribute:"plugin_type", value:"local"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"NewStart CGSL Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/ZTE-CGSL/release", "Host/ZTE-CGSL/rpm-list", "Host/cpu"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("rpm.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); release = get_kb_item("Host/ZTE-CGSL/release"); if (isnull(release) || release !~ "^CGSL (MAIN|CORE)") audit(AUDIT_OS_NOT, "NewStart Carrier Grade Server Linux"); if (release !~ "CGSL MAIN 4.05") audit(AUDIT_OS_NOT, 'NewStart CGSL MAIN 4.05'); if (!get_kb_item("Host/ZTE-CGSL/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "NewStart Carrier Grade Server Linux", cpu); flag = 0; pkgs = { "CGSL MAIN 4.05": [ "kernel-2.6.32-642.13.1.el6.cgsl7763", "kernel-abi-whitelists-2.6.32-642.13.1.el6.cgsl7763", "kernel-debug-2.6.32-642.13.1.el6.cgsl7763", "kernel-debug-debuginfo-2.6.32-642.13.1.el6.cgsl7763", "kernel-debug-devel-2.6.32-642.13.1.el6.cgsl7763", "kernel-debuginfo-2.6.32-642.13.1.el6.cgsl7763", "kernel-debuginfo-common-x86_64-2.6.32-642.13.1.el6.cgsl7763", "kernel-devel-2.6.32-642.13.1.el6.cgsl7763", "kernel-doc-2.6.32-642.13.1.el6.cgsl7763", "kernel-firmware-2.6.32-642.13.1.el6.cgsl7763", "kernel-headers-2.6.32-642.13.1.el6.cgsl7763", "perf-2.6.32-642.13.1.el6.cgsl7763", "perf-debuginfo-2.6.32-642.13.1.el6.cgsl7763", "python-perf-2.6.32-642.13.1.el6.cgsl7763", "python-perf-debuginfo-2.6.32-642.13.1.el6.cgsl7763" ] }; pkg_list = pkgs[release]; foreach (pkg in pkg_list) if (rpm_check(release:"ZTE " + release, reference:pkg)) flag++; if (flag) { security_report_v4( port : 0, severity : SECURITY_HOLE, extra : rpm_report_get() ); exit(0); } else { tested = pkg_tests_get(); if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested); else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel"); }
NASL family CentOS Local Security Checks NASL id CENTOS_RHSA-2018-2390.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of 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. [Updated 16th August 2018] The original errata text was missing reference to CVE-2018-5390 fix. We have updated the errata text to correct this issue. No changes have been made to the packages. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor last seen 2020-06-01 modified 2020-06-02 plugin id 111704 published 2018-08-15 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/111704 title CentOS 6 : kernel (CESA-2018:2390) (Foreshadow) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-2393.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6.5 Advanced Update Support. 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) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Vegard Nossum (Oracle Corporation) for reporting CVE-2018-10901. last seen 2020-06-01 modified 2020-06-02 plugin id 111734 published 2018-08-15 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/111734 title RHEL 6 : kernel (RHSA-2018:2393) (Foreshadow) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-2390.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of 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. [Updated 16th August 2018] The original errata text was missing reference to CVE-2018-5390 fix. We have updated the errata text to correct this issue. No changes have been made to the packages. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor last seen 2020-06-01 modified 2020-06-02 plugin id 111731 published 2018-08-15 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/111731 title RHEL 6 : kernel (RHSA-2018:2390) (Foreshadow) NASL family Scientific Linux Local Security Checks NASL id SL_20180814_KERNEL_ON_SL6_X.NASL description Security Fix(es) : - Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor last seen 2020-03-18 modified 2018-08-16 plugin id 111777 published 2018-08-16 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/111777 title Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (20180814) (Foreshadow) NASL family Junos Local Security Checks NASL id JUNIPER_SPACE_JSA10917_184R1.NASL description According to its self-reported version number, the remote Junos Space version is 18.4.x prior to 18.4R1. It is, therefore, affected by multiple vulnerabilities : - An integer overflow issue exists in procps-ng. This is related to CVE-2018-1124. (CVE-2018-1126) - A directory traversal issue exits in reposync, a part of yum-utils.tory configuration files. If an attacker controls a repository, they may be able to copy files outside of the destination directory on the targeted system via path traversal. (CVE-2018-10897) - An integer overflow flaw was found in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 121068 published 2019-01-10 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/121068 title Juniper Junos Space 18.4.x < 18.4R1 Multiple Vulnerabilities (JSA10917) NASL family Virtuozzo Local Security Checks NASL id VIRTUOZZO_VZA-2018-055.NASL description According to the versions of the cpupools / cpupools-features / etc packages installed, the Virtuozzo installation on the remote host is affected by the following vulnerabilities : - Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. - An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor last seen 2020-06-01 modified 2020-06-02 plugin id 112018 published 2018-08-20 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/112018 title Virtuozzo 6 : cpupools / cpupools-features / etc (VZA-2018-055) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-2394.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6.4 Advanced Update Support. 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) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor last seen 2020-06-01 modified 2020-06-02 plugin id 111735 published 2018-08-15 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/111735 title RHEL 6 : kernel (RHSA-2018:2394) (Foreshadow) (Spectre) NASL family Amazon Linux Local Security Checks NASL id AL2_ALAS-2018-994.NASL description Race condition in the store_int_with_restart() function in cpu/mcheck/mce.c : A race condition in the store_int_with_restart() function in arch/x86/kernel/cpu/mcheck/mce.c in the Linux kernel allows local users to cause a denial of service (panic) by leveraging root access to write to the check_interval file in a /sys/devices/system/machinecheck/machinecheck<cpu number> directory. (CVE-2018-7995) Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c : A flaw was found in the Linux kernel last seen 2020-06-01 modified 2020-06-02 plugin id 109177 published 2018-04-20 reporter This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/109177 title Amazon Linux 2 : kernel (ALAS-2018-994) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-2391.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. 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) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Vegard Nossum (Oracle Corporation) for reporting CVE-2018-10901. last seen 2020-06-01 modified 2020-06-02 plugin id 111732 published 2018-08-15 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/111732 title RHEL 6 : kernel (RHSA-2018:2391) (Foreshadow) NASL family Oracle Linux Local Security Checks NASL id ORACLELINUX_ELSA-2018-2390.NASL description From Red Hat Security Advisory 2018:2390 : An update for kernel is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of 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. [Updated 16th August 2018] The original errata text was missing reference to CVE-2018-5390 fix. We have updated the errata text to correct this issue. No changes have been made to the packages. The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions past bounds check. The flaw relies on the presence of a precisely-defined instruction sequence in the privileged code and the fact that memory writes occur to an address which depends on the untrusted value. Such writes cause an update into the microprocessor last seen 2020-06-01 modified 2020-06-02 plugin id 111724 published 2018-08-15 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/111724 title Oracle Linux 6 : kernel (ELSA-2018-2390) (Foreshadow) NASL family Red Hat Local Security Checks NASL id REDHAT-RHSA-2018-2392.NASL description An update for kernel is now available for Red Hat Enterprise Linux 6.6 Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco Extended Update Support. 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) : * Modern operating systems implement virtualization of physical memory to efficiently use available system resources and provide inter-domain protection through access control and isolation. The L1TF issue was found in the way the x86 microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimisation) in combination with handling of page-faults caused by terminated virtual to physical address resolving process. As a result, an unprivileged attacker could use this flaw to read privileged memory of the kernel or other processes and/or cross guest/host boundaries to read host memory by conducting targeted cache side-channel attacks. (CVE-2018-3620, CVE-2018-3646) * kernel: kvm: vmx: host GDT limit corruption (CVE-2018-10901) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting CVE-2018-3620 and CVE-2018-3646 and Vegard Nossum (Oracle Corporation) for reporting CVE-2018-10901. last seen 2020-06-01 modified 2020-06-02 plugin id 111733 published 2018-08-15 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/111733 title RHEL 6 : kernel (RHSA-2018:2392) (Foreshadow)
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References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3444d7da1839b851eefedd372978d8a982316c36
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10901
- http://www.securityfocus.com/bid/104905
- https://access.redhat.com/errata/RHSA-2018:2394
- https://access.redhat.com/errata/RHSA-2018:2393
- https://access.redhat.com/errata/RHSA-2018:2392
- https://access.redhat.com/errata/RHSA-2018:2391
- https://access.redhat.com/errata/RHSA-2018:2390
- https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/security-alerts/cpujul2020.html