Security update for the Linux Kernel (Live Patch 3 for SLE 12 SP3)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 3 for SLE 12 SP3)
Announcement ID: SUSE-SU-2018:2413-1
Rating: important
References: #1096564 #1096679 #1097108 #1099306 #1103203
Affected Products:
  • SUSE Linux Enterprise Live Patching 12-SP3

  • An update that fixes 5 vulnerabilities is now available.

    Description:

    This update for the Linux Kernel 4.4.82-6_9 fixes several issues.

    The following security issues were fixed:

    - CVE-2018-3646: Local attackers in virtualized guest systems could use
    speculative code patterns on hyperthreaded processors to read data
    present in the L1 Datacache used by other hyperthreads on the same CPU
    core, potentially leaking sensitive data, even from other virtual
    machines or the host system (bsc#1099306).
    - CVE-2017-18344: The timer_create syscall implementation in
    kernel/time/posix-timers.c didn't properly validate the
    sigevent->sigev_notify field, which lead to out-of-bounds access in the
    show_timer function (called when /proc/$PID/timers is read). This
    allowed userspace applications to read arbitrary kernel memory (on a
    kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE)
    (bsc#1103203). before 4.14.8
    - CVE-2017-17053: The init_new_context function in
    arch/x86/include/asm/mmu_context.h did not correctly handle errors from
    LDT table allocation when forking a new process, allowing a local
    attacker to achieve a use-after-free or possibly have unspecified other
    impact by running a specially crafted program. This vulnerability only
    affected kernels built with CONFIG_MODIFY_LDT_SYSCALL=y (bsc#1096679).
    - CVE-2017-11600: net/xfrm/xfrm_policy.c did not ensure that the dir value
    of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allowed local
    users to cause a denial of service (out-of-bounds access) or possibly
    have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink
    message (bsc#1096564)
    - CVE-2018-10853: A flaw was found in kvm. In which certain instructions
    such as sgdt/sidt call segmented_write_std didn't propagate access
    correctly. As such, during userspace induced exception, the guest can
    incorrectly assume that the exception happened in the kernel and panic.
    (bsc#1097108).

    Patch Instructions:

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
    Alternatively you can run the command listed for your product:

    • SUSE Linux Enterprise Live Patching 12-SP3:
      zypper in -t patch SUSE-SLE-Live-Patching-12-SP3-2018-1669=1 SUSE-SLE-Live-Patching-12-SP3-2018-1670=1 SUSE-SLE-Live-Patching-12-SP3-2018-1671=1

    Package List:

    • SUSE Linux Enterprise Live Patching 12-SP3 (x86_64):
      • kgraft-patch-4_4_82-6_3-default-11-2.1
      • kgraft-patch-4_4_82-6_3-default-debuginfo-11-2.1
      • kgraft-patch-4_4_82-6_6-default-10-2.1
      • kgraft-patch-4_4_82-6_6-default-debuginfo-10-2.1
      • kgraft-patch-4_4_82-6_9-default-10-2.1
      • kgraft-patch-4_4_82-6_9-default-debuginfo-10-2.1

    References: