Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2018:0438-1
Rating: important
References: #1027519 #1035442 #1051729 #1061081 #1067317 #1068032 #1070158 #1070159 #1070160 #1070163 #1074562 #1076116 #1076180
Affected Products:
  • SUSE Linux Enterprise Software Development Kit 12-SP3
  • SUSE Linux Enterprise Server 12-SP3
  • SUSE Linux Enterprise Desktop 12-SP3
  • SUSE CaaS Platform ALL

  • An update that solves 10 vulnerabilities and has three fixes is now available.

    Description:

    This update for xen fixes several issues.

    These security issues were fixed:

    - CVE-2017-5753, CVE-2017-5715, CVE-2017-5754: Prevent information leaks
    via side effects of speculative execution, aka "Spectre" and "Meltdown"
    attacks (bsc#1074562, bsc#1068032)
    - CVE-2017-15595: x86 PV guest OS users were able to cause a DoS
    (unbounded recursion, stack consumption, and hypervisor crash) or
    possibly gain privileges via crafted page-table stacking (bsc#1061081)
    - CVE-2017-17566: Prevent PV guest OS users to cause a denial of service
    (host OS crash) or gain host OS privileges in shadow mode by mapping a
    certain auxiliary page (bsc#1070158).
    - CVE-2017-17563: Prevent guest OS users to cause a denial of service
    (host OS crash) or gain host OS privileges by leveraging an incorrect
    mask for reference-count overflow checking in shadow mode (bsc#1070159).
    - CVE-2017-17564: Prevent guest OS users to cause a denial of service
    (host OS crash) or gain host OS privileges by leveraging incorrect error
    handling for reference counting in shadow mode (bsc#1070160).
    - CVE-2017-17565: Prevent PV guest OS users to cause a denial of service
    (host OS crash) if shadow mode and log-dirty mode are in place, because
    of an incorrect assertion related to M2P (bsc#1070163).
    - CVE-2018-5683: The vga_draw_text function allowed local OS guest
    privileged users to cause a denial of service (out-of-bounds read and
    QEMU process crash) by leveraging improper memory address validation
    (bsc#1076116).
    - CVE-2017-18030: The cirrus_invalidate_region function allowed local OS
    guest privileged users to cause a denial of service (out-of-bounds array
    access and QEMU process crash) via vectors related to negative pitch
    (bsc#1076180).

    These non-security issues were fixed:

    - bsc#1067317: pass cache=writeback|unsafe|directsync to qemu depending on
    the libxl disk settings
    - bsc#1051729: Prevent invalid symlinks after install of SLES 12 SP2
    - bsc#1035442: Increased the value of LIBXL_DESTROY_TIMEOUT from 10 to 100
    seconds. If many domUs shutdown in parallel the backends couldn't keep up
    - bsc#1027519: Added several upstream patches

    Patch Instructions:

    To install this SUSE Security Update use YaST online_update.
    Alternatively you can run the command listed for your product:

    • SUSE Linux Enterprise Software Development Kit 12-SP3:
      zypper in -t patch SUSE-SLE-SDK-12-SP3-2018-302=1
    • SUSE Linux Enterprise Server 12-SP3:
      zypper in -t patch SUSE-SLE-SERVER-12-SP3-2018-302=1
    • SUSE Linux Enterprise Desktop 12-SP3:
      zypper in -t patch SUSE-SLE-DESKTOP-12-SP3-2018-302=1
    • SUSE CaaS Platform ALL:
      zypper in -t patch SUSE-CAASP-ALL-2018-302=1

    To bring your system up-to-date, use "zypper patch".

    Package List:

    • SUSE Linux Enterprise Software Development Kit 12-SP3 (aarch64 x86_64):
      • xen-debugsource-4.9.1_08-3.26.1
      • xen-devel-4.9.1_08-3.26.1
    • SUSE Linux Enterprise Server 12-SP3 (x86_64):
      • xen-4.9.1_08-3.26.1
      • xen-debugsource-4.9.1_08-3.26.1
      • xen-doc-html-4.9.1_08-3.26.1
      • xen-libs-32bit-4.9.1_08-3.26.1
      • xen-libs-4.9.1_08-3.26.1
      • xen-libs-debuginfo-32bit-4.9.1_08-3.26.1
      • xen-libs-debuginfo-4.9.1_08-3.26.1
      • xen-tools-4.9.1_08-3.26.1
      • xen-tools-debuginfo-4.9.1_08-3.26.1
      • xen-tools-domU-4.9.1_08-3.26.1
      • xen-tools-domU-debuginfo-4.9.1_08-3.26.1
    • SUSE Linux Enterprise Desktop 12-SP3 (x86_64):
      • xen-4.9.1_08-3.26.1
      • xen-debugsource-4.9.1_08-3.26.1
      • xen-libs-32bit-4.9.1_08-3.26.1
      • xen-libs-4.9.1_08-3.26.1
      • xen-libs-debuginfo-32bit-4.9.1_08-3.26.1
      • xen-libs-debuginfo-4.9.1_08-3.26.1
    • SUSE CaaS Platform ALL (x86_64):
      • xen-debugsource-4.9.1_08-3.26.1
      • xen-libs-4.9.1_08-3.26.1
      • xen-libs-debuginfo-4.9.1_08-3.26.1
      • xen-tools-domU-4.9.1_08-3.26.1
      • xen-tools-domU-debuginfo-4.9.1_08-3.26.1

    References: