Security update for the Linux Kernel (Live Patch 1 for SLE 15)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 1 for SLE 15)
Announcement ID: SUSE-SU-2018:2472-1
Rating: important
References: #1097108 #1099306 #1102682 #1103203
Affected Products:
  • SUSE Linux Enterprise Module for Live Patching 15

  • An update that fixes four vulnerabilities is now available.

    Description:

    This update for the Linux Kernel 4.12.14-25_3 fixes several issues.

    The following security issues were fixed:

    - CVE-2018-5390: Linux kernel versions 4.9+ can be forced to make very
    expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue()
    for every incoming packet which can lead to a denial of service
    (bsc#1102682).
    - 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-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 Module for Live Patching 15:
      zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2018-1737=1

    Package List:

    • SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64):
      • kernel-livepatch-4_12_14-25_3-default-2-2.1
      • kernel-livepatch-4_12_14-25_3-default-debuginfo-2-2.1

    References: