Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2018:1181-1
Rating: important
References: #1027519 #1035442 #1057493 #1072834 #1083292 #1086107 #1089152 #1089635 #1090820 #1090822 #1090823
Affected Products:
  • SUSE Linux Enterprise Software Development Kit 11-SP4
  • SUSE Linux Enterprise Server 11-SP4
  • SUSE Linux Enterprise Debuginfo 11-SP4

  • An update that solves four vulnerabilities and has 7 fixes is now available.


    This update for xen fixes several issues.

    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-2018-7550: The load_multiboot function allowed local guest OS users
    to execute arbitrary code on the host via a mh_load_end_addr value
    greater than mh_bss_end_addr, which triggers an out-of-bounds read or
    write memory access (bsc#1083292).

    These non-security issues were fixed:

    - bsc#1072834: Prevent unchecked MSR access error
    - bsc#1035442: Increase the value of LIBXL_DESTROY_TIMEOUT from 10 to 100
    seconds, allowing for more domUs to be shutdown in parallel
    - bsc#1057493: Prevent DomU crash

    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 11-SP4:
      zypper in -t patch sdksp4-xen-13593=1
    • SUSE Linux Enterprise Server 11-SP4:
      zypper in -t patch slessp4-xen-13593=1
    • SUSE Linux Enterprise Debuginfo 11-SP4:
      zypper in -t patch dbgsp4-xen-13593=1

    Package List:

    • SUSE Linux Enterprise Software Development Kit 11-SP4 (i586 x86_64):
      • xen-devel-4.4.4_30-61.26.1
    • SUSE Linux Enterprise Server 11-SP4 (i586 x86_64):
      • xen-kmp-default-4.4.4_30_3.0.101_108.38-61.26.1
      • xen-libs-4.4.4_30-61.26.1
      • xen-tools-domU-4.4.4_30-61.26.1
    • SUSE Linux Enterprise Server 11-SP4 (x86_64):
      • xen-4.4.4_30-61.26.1
      • xen-doc-html-4.4.4_30-61.26.1
      • xen-libs-32bit-4.4.4_30-61.26.1
      • xen-tools-4.4.4_30-61.26.1
    • SUSE Linux Enterprise Server 11-SP4 (i586):
      • xen-kmp-pae-4.4.4_30_3.0.101_108.38-61.26.1
    • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):
      • xen-debuginfo-4.4.4_30-61.26.1
      • xen-debugsource-4.4.4_30-61.26.1