Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2017:2327-2
Rating: important
References: #1002573 #1026236 #1027519 #1035231 #1046637 #1049578 #1051787 #1051788 #1051789 #1052686 #1055695
Affected Products:
  • SUSE Linux Enterprise Server 12-SP3

  • An update that solves 6 vulnerabilities and has 5 fixes is now available.

    Description:

    This update for xen fixes several issues.

    These security issues were fixed:

    - CVE-2017-12135: Unbounded recursion in grant table code allowed a
    malicious guest to crash the host or potentially escalate
    privileges/leak information (XSA-226, bsc#1051787).
    - CVE-2017-12137: Incorrectly-aligned updates to pagetables allowed for
    privilege escalation (XSA-227, bsc#1051788).
    - CVE-2017-12136: Race conditions with maptrack free list handling allows
    a malicious guest administrator to crash the host or escalate their
    privilege to that of the host (XSA-228, bsc#1051789).
    - CVE-2017-11434: The dhcp_decode function in slirp/bootp.c allowed local
    guest OS users to cause a denial of service (out-of-bounds read) via a
    crafted DHCP
    options string (bsc#1049578).
    - CVE-2017-10664: qemu-nbd did not ignore SIGPIPE, which allowed remote
    attackers to cause a denial of service (daemon crash) by disconnecting
    during a server-to-client reply attempt (bsc#1046637).
    - CVE-2017-12855: Premature clearing of GTF_writing / GTF_reading lead to
    potentially leaking sensitive information (XSA-230 bsc#1052686.

    These non-security issues were fixed:

    - bsc#1055695: XEN: 11SP4 and 12SP3 HVM guests can not be restored after
    the save using xl stack
    - bsc#1035231: Migration of HVM domU did not use superpages on destination
    dom0
    - bsc#1002573: Optimized LVM functions in block-dmmd block-dmmd

    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 Server 12-SP3:
      zypper in -t patch SUSE-SLE-SERVER-12-SP3-2017-1437=1

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

    Package List:

    • SUSE Linux Enterprise Server 12-SP3 (x86_64):
      • xen-4.9.0_11-3.9.1
      • xen-debugsource-4.9.0_11-3.9.1
      • xen-doc-html-4.9.0_11-3.9.1
      • xen-libs-32bit-4.9.0_11-3.9.1
      • xen-libs-4.9.0_11-3.9.1
      • xen-libs-debuginfo-32bit-4.9.0_11-3.9.1
      • xen-libs-debuginfo-4.9.0_11-3.9.1
      • xen-tools-4.9.0_11-3.9.1
      • xen-tools-debuginfo-4.9.0_11-3.9.1
      • xen-tools-domU-4.9.0_11-3.9.1
      • xen-tools-domU-debuginfo-4.9.0_11-3.9.1

    References: