ID

VAR-201805-0950

CVE

CVE-2018-8897

TITLE

Hardware debug exception documentation may result in unexpected behavior

DESCRIPTION

A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) was mishandled in the development of some or all operating-system kernels, resulting in unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS, as demonstrated by (for example) privilege escalation in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux kernel crash. The MOV to SS and POP SS instructions inhibit interrupts (including NMIs), data breakpoints, and single step trap exceptions until the instruction boundary following the next instruction (SDM Vol. 3A; section 6.8.3). (The inhibited data breakpoints are those on memory accessed by the MOV to SS or POP to SS instruction itself.) Note that debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF) system flag (SDM Vol. 3A; section 2.3). If the instruction following the MOV to SS or POP to SS instruction is an instruction like SYSCALL, SYSENTER, INT 3, etc. that transfers control to the operating system at CPL < 3, the debug exception is delivered after the transfer to CPL < 3 is complete. OS kernels may not expect this order of events and may therefore experience unexpected behavior when it occurs. In some circumstances, some operating systems or hypervisors may not expect or properly handle an Intel architecture hardware debug exception. Microsoft Windows is prone to a local privilege-escalation vulnerability. An attacker can exploit this issue to execute arbitrary code with elevated privileges. Intel Architecture (processor architecture) is a CPU specification developed by Intel Corporation for its processor. There are security vulnerabilities in the operating systems of multiple vendors. Systems from the following vendors are affected: Apple; DragonFly BSD Project; FreeBSD Project; Linux Kernel; Microsoft; Red Hat; SUSE Linux; Ubuntu; Vmware; Xen. 6.6) - noarch, x86_64 3. Bug Fix(es): * If an NFSv3 client mounted a subdirectory of an exported file system, a directory entry to the mount hosting the export was incorrectly held even after clearing the cache. Consequently, attempts to unmount the subdirectory with the umount command failed with the EBUSY error. With this update, the underlying source code has been fixed, and the unmount operation now succeeds as expected in the described situation. (BZ#1538588) * The kernel build requirements have been updated to the GNU Compiler Collection (GCC) compiler version that has the support for Retpolines. The Retpolines mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. (BZ#1554254) 4. These CVEs are both related to the way that the linux kernel handles certain interrupt and exception instructions. The issue can be triggered by an unprivileged user. The fix for this problem requires modification of the interrupt descriptor tables (IDT), and modification of the interrupt handlers. Livepatch is unable to safely modify these areas, so upgrading to a corrected kernel and rebooting is required to fix the problem. References: CVE-2018-1087, CVE-2018-8897 -- ubuntu-security-announce mailing list ubuntu-security-announce@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce . 6.4) - x86_64 3. (BZ#1554251) 4. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security, bug fix, and enhancement update Advisory ID: RHSA-2018:1318-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1318 Issue date: 2018-05-08 CVE Names: CVE-2017-16939 CVE-2018-1068 CVE-2018-1087 CVE-2018-1091 CVE-2018-8897 CVE-2018-1000199 ===================================================================== 1. Summary: 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - noarch, ppc64le, s390x Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - noarch, ppc64le 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * Kernel: KVM: error in exception handling leads to wrong debug stack value (CVE-2018-1087) * Kernel: error in exception handling leads to DoS (CVE-2018-8897) * Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation (CVE-2017-16939) * kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c (CVE-2018-1068) * kernel: ptrace() incorrect error handling leads to corruption and DoS (CVE-2018-1000199) * kernel: guest kernel crash during core dump on POWER9 host (CVE-2018-1091) 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 Andy Lutomirski for reporting CVE-2018-1087 and CVE-2018-1000199 and Nick Peterson (Everdox Tech LLC) and Andy Lutomirski for reporting CVE-2018-8897. Bug Fix(es): These updated kernel packages include also numerous bug fixes. Space precludes documenting all of these bug fixes in this advisory. See the bug fix descriptions in the related Knowledge Article: https://access.redhat.com/articles/3431641 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1517220 - CVE-2017-16939 Kernel: ipsec: xfrm: use-after-free leading to potential privilege escalation 1552048 - CVE-2018-1068 kernel: Out-of-bounds write via userland offsets in ebt_entry struct in netfilter/ebtables.c 1558149 - CVE-2018-1091 kernel: guest kernel crash during core dump on POWER9 host 1566837 - CVE-2018-1087 Kernel: KVM: error in exception handling leads to wrong debug stack value 1567074 - CVE-2018-8897 Kernel: error in exception handling leads to DoS 1568477 - CVE-2018-1000199 kernel: ptrace() incorrect error handling leads to corruption and DoS 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: kernel-3.10.0-862.2.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-862.2.3.el7.noarch.rpm kernel-doc-3.10.0-862.2.3.el7.noarch.rpm x86_64: kernel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-headers-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-862.2.3.el7.x86_64.rpm perf-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: kernel-3.10.0-862.2.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-862.2.3.el7.noarch.rpm kernel-doc-3.10.0-862.2.3.el7.noarch.rpm x86_64: kernel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-headers-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-862.2.3.el7.x86_64.rpm perf-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: kernel-3.10.0-862.2.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-862.2.3.el7.noarch.rpm kernel-doc-3.10.0-862.2.3.el7.noarch.rpm ppc64: kernel-3.10.0-862.2.3.el7.ppc64.rpm kernel-bootwrapper-3.10.0-862.2.3.el7.ppc64.rpm kernel-debug-3.10.0-862.2.3.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm kernel-debug-devel-3.10.0-862.2.3.el7.ppc64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-862.2.3.el7.ppc64.rpm kernel-devel-3.10.0-862.2.3.el7.ppc64.rpm kernel-headers-3.10.0-862.2.3.el7.ppc64.rpm kernel-tools-3.10.0-862.2.3.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm kernel-tools-libs-3.10.0-862.2.3.el7.ppc64.rpm perf-3.10.0-862.2.3.el7.ppc64.rpm perf-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm python-perf-3.10.0-862.2.3.el7.ppc64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm ppc64le: kernel-3.10.0-862.2.3.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debug-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-862.2.3.el7.ppc64le.rpm kernel-devel-3.10.0-862.2.3.el7.ppc64le.rpm kernel-headers-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-libs-3.10.0-862.2.3.el7.ppc64le.rpm perf-3.10.0-862.2.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm python-perf-3.10.0-862.2.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm s390x: kernel-3.10.0-862.2.3.el7.s390x.rpm kernel-debug-3.10.0-862.2.3.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.s390x.rpm kernel-debug-devel-3.10.0-862.2.3.el7.s390x.rpm kernel-debuginfo-3.10.0-862.2.3.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-862.2.3.el7.s390x.rpm kernel-devel-3.10.0-862.2.3.el7.s390x.rpm kernel-headers-3.10.0-862.2.3.el7.s390x.rpm kernel-kdump-3.10.0-862.2.3.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-862.2.3.el7.s390x.rpm kernel-kdump-devel-3.10.0-862.2.3.el7.s390x.rpm perf-3.10.0-862.2.3.el7.s390x.rpm perf-debuginfo-3.10.0-862.2.3.el7.s390x.rpm python-perf-3.10.0-862.2.3.el7.s390x.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.s390x.rpm x86_64: kernel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-headers-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-862.2.3.el7.x86_64.rpm perf-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7): noarch: kernel-abi-whitelists-3.10.0-862.2.3.el7.noarch.rpm kernel-doc-3.10.0-862.2.3.el7.noarch.rpm ppc64le: kernel-3.10.0-862.2.3.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debug-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-862.2.3.el7.ppc64le.rpm kernel-devel-3.10.0-862.2.3.el7.ppc64le.rpm kernel-headers-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-libs-3.10.0-862.2.3.el7.ppc64le.rpm perf-3.10.0-862.2.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm python-perf-3.10.0-862.2.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm s390x: kernel-3.10.0-862.2.3.el7.s390x.rpm kernel-debug-3.10.0-862.2.3.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.s390x.rpm kernel-debug-devel-3.10.0-862.2.3.el7.s390x.rpm kernel-debuginfo-3.10.0-862.2.3.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-862.2.3.el7.s390x.rpm kernel-devel-3.10.0-862.2.3.el7.s390x.rpm kernel-headers-3.10.0-862.2.3.el7.s390x.rpm kernel-kdump-3.10.0-862.2.3.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-862.2.3.el7.s390x.rpm kernel-kdump-devel-3.10.0-862.2.3.el7.s390x.rpm perf-3.10.0-862.2.3.el7.s390x.rpm perf-debuginfo-3.10.0-862.2.3.el7.s390x.rpm python-perf-3.10.0-862.2.3.el7.s390x.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.s390x.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: kernel-debug-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-862.2.3.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.ppc64.rpm perf-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debug-devel-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7): noarch: kernel-doc-3.10.0-862.2.3.el7.noarch.rpm ppc64le: kernel-debug-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debug-devel-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.ppc64le.rpm perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.ppc64le.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: kernel-3.10.0-862.2.3.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-862.2.3.el7.noarch.rpm kernel-doc-3.10.0-862.2.3.el7.noarch.rpm x86_64: kernel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debug-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-devel-3.10.0-862.2.3.el7.x86_64.rpm kernel-headers-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-3.10.0-862.2.3.el7.x86_64.rpm perf-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: kernel-debug-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-862.2.3.el7.x86_64.rpm perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm python-perf-debuginfo-3.10.0-862.2.3.el7.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2017-16939 https://access.redhat.com/security/cve/CVE-2018-1068 https://access.redhat.com/security/cve/CVE-2018-1087 https://access.redhat.com/security/cve/CVE-2018-1091 https://access.redhat.com/security/cve/CVE-2018-8897 https://access.redhat.com/security/cve/CVE-2018-1000199 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/3431641 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFa8evCXlSAg2UNWIIRArfVAJkBoBiLSeqFIz+baibVTReRFZDjygCff6YB NvzATG53DXsBLux92Ow7M4o= =Sknh -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . ========================================================================== Ubuntu Security Notice USN-3641-2 May 08, 2018 linux, linux-lts-trusty vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 ESM Summary: Several security issues were fixed in the Linux kernel. This update provides the corresponding updates for Ubuntu 12.04 ESM. A local attacker could use this to cause a denial of service (system crash). This issue only affected the amd64 architecture. A local attacker in a KVM virtual machine could use this to cause a denial of service (guest VM crash) or possibly escalate privileges inside of the virtual machine. This issue only affected the i386 and amd64 architectures. (CVE-2018-1087) Andy Lutomirski discovered that the Linux kernel did not properly perform error handling on virtualized debug registers. (CVE-2018-1000199) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-147-generic 3.13.0-147.196~precise1 linux-image-3.13.0-147-generic-lpae 3.13.0-147.196~precise1 linux-image-3.2.0-134-generic 3.2.0-134.180 linux-image-3.2.0-134-generic-pae 3.2.0-134.180 linux-image-3.2.0-134-highbank 3.2.0-134.180 linux-image-3.2.0-134-omap 3.2.0-134.180 linux-image-3.2.0-134-powerpc-smp 3.2.0-134.180 linux-image-3.2.0-134-powerpc64-smp 3.2.0-134.180 linux-image-3.2.0-134-virtual 3.2.0-134.180 linux-image-generic 3.2.0.134.149 linux-image-generic-lpae-lts-trusty 3.13.0.147.138 linux-image-generic-lts-trusty 3.13.0.147.138 linux-image-generic-pae 3.2.0.134.149 linux-image-highbank 3.2.0.134.149 linux-image-omap 3.2.0.134.149 linux-image-powerpc 3.2.0.134.149 linux-image-powerpc-smp 3.2.0.134.149 linux-image-powerpc64-smp 3.2.0.134.149 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-18:06.debugreg Security Advisory The FreeBSD Project Topic: Mishandling of x86 debug exceptions Category: core Module: kernel Announced: 2018-05-08 Credits: Nick Peterson, Everdox Tech LLC https://www.linkedin.com/in/everdox Andy Lutomirski Affects: All supported versions of FreeBSD. Corrected: 2018-05-08 17:03:33 UTC (stable/11, 11.2-PRERELEASE) 2018-05-08 17:12:10 UTC (releng/11.1, 11.1-RELEASE-p10) 2018-05-08 17:05:39 UTC (stable/10, 10.4-STABLE) 2018-05-08 17:12:10 UTC (releng/10.4, 10.4-RELEASE-p9) CVE Name: CVE-2018-8897 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>. Background On x86 architecture systems, the stack is represented by the combination of a stack segment and a stack pointer, which must remain in sync for proper operation. Instructions related to manipulating the stack segment have special handling to facilitate consistency with changes to the stack pointer. II. If that instruction is a system call or similar instruction that transfers control to the operating system, the debug exception will be handled in the kernel context instead of the user context. III. Impact An authenticated local attacker may be able to read sensitive data in kernel memory, control low-level operating system functions, or may panic the system. IV. Workaround No workaround is available. V. Solution Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date, using either a binary or source code patch, and then reboot. 1) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the i386 or amd64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install And reboot. 2) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 11.1] # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.11.1.patch # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.11.1.patch.asc # gpg --verify debugreg.11.1.patch.asc [FreeBSD 10.4] # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.10.4.patch # fetch https://security.FreeBSD.org/patches/SA-18:06/debugreg.10.4.patch.asc # gpg --verify debugreg.10.4.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile and install your kernel as described in <URL:https://www.FreeBSD.org/handbook/kernelconfig.html> and reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/10/ r333370 releng/10.4/ r333371 stable/11/ r333369 releng/11.1/ r333371 - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. 6.7) - i386, ppc64, s390x, x86_64 3. (BZ#1554253) 4. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. CVE-2018-1087 Andy Lutomirski discovered that the KVM implementation did not properly handle #DB exceptions while deferred by MOV SS/POP SS, allowing an unprivileged KVM guest user to crash the guest or potentially escalate their privileges. For the oldstable distribution (jessie), these problems have been fixed in version 3.16.56-1+deb8u1. This update includes various fixes for regressions from 3.16.56-1 as released in DSA-4187-1 (Cf. For the stable distribution (stretch), these problems have been fixed in version 4.9.88-1+deb9u1. The fix for CVE-2018-1108 applied in DSA-4188-1 is temporarily reverted due to various regression, cf. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAlryHFFfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0SMQA/9HoJDt2OdyqqtfNUuWfP3sgGV1QVjIJnF39unKRdIaGw9m0RHQUu1G3rC cgxcYcpQ0h10Yy5KVh4APqt55K7aVWVQT6xB0yx2VddMEwwl3rp2r/eL7EtoOkQT zZW5JponzlEAjC9uGk7CouA7z/qFtd5awufFhAjMF5eL4ZQ6pG8wWEbae6DbU9nz c7F+okC4hL6yPuWVEWzTRUFK1W0hs2N+VQgHV/afZaMAAooeZJDJeq1Hn/PVYvwJ IHSOs01+kn0OUFHkVRA7kVdFAYUJlfhsDcXd9nB/lkxhc/HNI1g/dK76mRxjsiMo pJlkPbEmZlOtmNG7vogxEp72ab24j2CITIHiID7ftZH5R/I2CSxp2dIzRVKdmP6P tsfh/KcpUMNwwiPiGed1DMCjtsHOodBOkLtVsoHHJVMZg2xqfCrlqNRUn9o+0DcR gO7HBsWG9K1qvSBWuRtQLT8QP00P3dSdhHmfWyfN8eJxTot+WJuMF/o+jbF6GGrZ lPmzWqg4oL7jvQO8nlEkatjIFejEg0jmt+rCXyEbK8Uc9xjJk35GKIZne5X09BFe 36zY7HbMlPvLP/VHSb6fcPBpQo/HuG0/htAB1HpWS1fPrth1J76g2EmwFSG5Lo51 IRxTXP4UZuOL1sJHQ80220tThKs2dk1Yy77dKk8qQiQ2nC2JgNs= =CskH -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

Design Error

EXPLOIT AVAILABILITY

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2024-12-20T21:24:00.524000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE