Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2018:1184-1
Rating: important
References: #1027519 #1072834 #1080634 #1080635 #1080662 #1087251 #1087252 #1089152 #1089635 #1090820 #1090822 #1090823
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 6 vulnerabilities and has 6 fixes is now available.


    This update for xen to version 4.9.2 fixes several issues.

    This feature was added:

    - Added script, udev rule and systemd service to watch for vcpu
    online/offline events in a HVM domU. They are triggered via 'xl vcpu-set
    domU N'

    These security issues were fixed:

    - CVE-2018-8897: Prevent mishandling of debug exceptions on x86 (XSA-260,
    - Handle HPET timers in IO-APIC mode correctly to prevent malicious or
    buggy HVM guests from causing a hypervisor crash or potentially
    privilege escalation/information leaks (XSA-261, bsc#1090822)
    - Prevent unbounded loop, induced by qemu allowing an attacker to
    permanently keep a physical CPU core busy (XSA-262, bsc#1090823)
    - CVE-2018-10472: x86 HVM guest OS users (in certain configurations) were
    able to read arbitrary dom0 files via QMP live insertion of a CDROM, in
    conjunction with specifying the target file as the backing file of a
    snapshot (bsc#1089152).
    - CVE-2018-10471: x86 PV guest OS users were able to cause a denial of
    service (out-of-bounds zero write and hypervisor crash) via unexpected
    INT 80 processing, because of an incorrect fix for CVE-2017-5754
    - CVE-2018-7540: x86 PV guest OS users were able to cause a denial of
    service (host OS CPU hang) via non-preemptable L3/L4 pagetable freeing
    - CVE-2018-7541: Guest OS users were able to cause a denial of service
    (hypervisor crash) or gain privileges by triggering a grant-table
    transition from v2 to v1 (bsc#1080662).
    - CVE-2018-7542: x86 PVH guest OS users were able to cause a denial of
    service (NULL pointer dereference and hypervisor crash) by leveraging
    the mishandling
    of configurations that lack a Local APIC (bsc#1080634).

    These non-security issues were fixed:

    - bsc#1087252: Update built-in defaults for xenstored in stubdom, keep
    default to run xenstored as daemon in dom0
    - bsc#1087251: Preserve xen-syms from xen-dbg.gz to allow processing
    vmcores with crash(1)
    - bsc#1072834: Prevent unchecked MSR access error

    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 Software Development Kit 12-SP3:
      zypper in -t patch SUSE-SLE-SDK-12-SP3-2018-828=1
    • SUSE Linux Enterprise Server 12-SP3:
      zypper in -t patch SUSE-SLE-SERVER-12-SP3-2018-828=1
    • SUSE Linux Enterprise Desktop 12-SP3:
      zypper in -t patch SUSE-SLE-DESKTOP-12-SP3-2018-828=1
    • SUSE CaaS Platform ALL:
      To install this update, use the SUSE CaaS Platform Velum dashboard. It will inform you if it detects new updates and let you then trigger updating of the complete cluster in a controlled way.

    Package List:

    • SUSE Linux Enterprise Software Development Kit 12-SP3 (aarch64 x86_64):
      • xen-debugsource-4.9.2_04-3.29.1
      • xen-devel-4.9.2_04-3.29.1
    • SUSE Linux Enterprise Server 12-SP3 (x86_64):
      • xen-4.9.2_04-3.29.1
      • xen-debugsource-4.9.2_04-3.29.1
      • xen-doc-html-4.9.2_04-3.29.1
      • xen-libs-32bit-4.9.2_04-3.29.1
      • xen-libs-4.9.2_04-3.29.1
      • xen-libs-debuginfo-32bit-4.9.2_04-3.29.1
      • xen-libs-debuginfo-4.9.2_04-3.29.1
      • xen-tools-4.9.2_04-3.29.1
      • xen-tools-debuginfo-4.9.2_04-3.29.1
      • xen-tools-domU-4.9.2_04-3.29.1
      • xen-tools-domU-debuginfo-4.9.2_04-3.29.1
    • SUSE Linux Enterprise Desktop 12-SP3 (x86_64):
      • xen-4.9.2_04-3.29.1
      • xen-debugsource-4.9.2_04-3.29.1
      • xen-libs-32bit-4.9.2_04-3.29.1
      • xen-libs-4.9.2_04-3.29.1
      • xen-libs-debuginfo-32bit-4.9.2_04-3.29.1
      • xen-libs-debuginfo-4.9.2_04-3.29.1
    • SUSE CaaS Platform ALL (x86_64):
      • xen-debugsource-4.9.2_04-3.29.1
      • xen-libs-4.9.2_04-3.29.1
      • xen-libs-debuginfo-4.9.2_04-3.29.1
      • xen-tools-domU-4.9.2_04-3.29.1
      • xen-tools-domU-debuginfo-4.9.2_04-3.29.1