Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2016:3156-1
Rating: important
References: #1000106 #1003030 #1003032 #1004016 #1005004 #1005005 #1007157 #1007160 #1009100 #1009103 #1009104 #1009107 #1009109 #1009111 #1011652 #953518
Affected Products:
  • SUSE Linux Enterprise Server for SAP 12
  • SUSE Linux Enterprise Server 12-LTSS

  • An update that fixes 16 vulnerabilities is now available.

    Description:


    This update for xen fixes several issues.

    These security issues were fixed:

    - CVE-2016-9637: ioport array overflow allowing a malicious guest
    administrator can escalate their privilege to that of the host
    (bsc#1011652)
    - CVE-2016-9386: x86 null segments were not always treated as unusable
    allowing an unprivileged guest user program to elevate its privilege to
    that of the guest operating system. Exploit of this vulnerability is
    easy on Intel and more complicated on AMD (bsc#1009100)
    - CVE-2016-9382: x86 task switch to VM86 mode was mis-handled, allowing a
    unprivileged guest process to escalate its privilege to that of the
    guest operating system on AMD hardware. On Intel hardware a malicious
    unprivileged guest process can crash the guest (bsc#1009103)
    - CVE-2016-9385: x86 segment base write emulation lacked canonical address
    checks, allowing a malicious guest administrator to crash the host
    (bsc#1009104)
    - CVE-2016-9383: The x86 64-bit bit test instruction emulation was broken,
    allowing a guest to modify arbitrary memory leading to arbitray code
    execution (bsc#1009107)
    - CVE-2016-9381: Improper processing of shared rings allowing guest
    administrators take over the qemu process, elevating their privilege to
    that of the qemu process (bsc#1009109)
    - CVE-2016-9380: Delimiter injection vulnerabilities in pygrub allowed
    guest administrators to obtain the contents of sensitive host files or
    delete the files (bsc#1009111)
    - CVE-2016-9379: Delimiter injection vulnerabilities in pygrub allowed
    guest administrators to obtain the contents of sensitive host files or
    delete the files (bsc#1009111)
    - CVE-2016-7777: Xen did not properly honor CR0.TS and CR0.EM, which
    allowed local x86 HVM guest OS users to read or modify FPU, MMX, or XMM
    register state information belonging to arbitrary tasks on the guest by
    modifying an instruction while the hypervisor is preparing to emulate it
    (bsc#1000106)
    - CVE-2016-8910: The rtl8139_cplus_transmit function in hw/net/rtl8139.c
    allowed local guest OS administrators to cause a denial of service
    (infinite loop and CPU consumption) by leveraging failure to limit the
    ring descriptor count (bsc#1007157)
    - CVE-2016-8909: The intel_hda_xfer function in hw/audio/intel-hda.c
    allowed local guest OS administrators to cause a denial of service
    (infinite loop and CPU consumption) via an entry with the same value for
    buffer length and pointer position (bsc#1007160)
    - CVE-2016-8667: The rc4030_write function in hw/dma/rc4030.c in allowed
    local guest OS administrators to cause a denial of service
    (divide-by-zero error and QEMU process crash) via a large interval timer
    reload value (bsc#1005004)
    - CVE-2016-8669: The serial_update_parameters function in hw/char/serial.c
    allowed local guest OS administrators to cause a denial of service
    (divide-by-zero error and QEMU process crash) via vectors involving a
    value of divider greater than baud base (bsc#1005005)
    - CVE-2016-8576: The xhci_ring_fetch function in hw/usb/hcd-xhci.c allowed
    local guest OS administrators to cause a denial of service (infinite
    loop and QEMU process crash) by leveraging failure to limit the number
    of link Transfer Request Blocks (TRB) to process (bsc#1004016)
    - CVE-2016-7908: The mcf_fec_do_tx function in hw/net/mcf_fec.c did not
    properly limit the buffer descriptor count when transmitting packets,
    which allowed local guest OS administrators to cause a denial of service
    (infinite loop and QEMU process crash) via vectors involving a buffer
    descriptor with a length of 0 and crafted values in bd.flags
    (bsc#1003030)
    - CVE-2016-7909: The pcnet_rdra_addr function in hw/net/pcnet.c allowed
    local guest OS administrators to cause a denial of service (infinite
    loop and QEMU process crash) by setting the (1) receive or (2) transmit
    descriptor ring length to 0 (bsc#1003032)

    These non-security issues were fixed:

    - bsc#953518: Unplug also SCSI disks in qemu-xen-traditional for upstream
    unplug protocol
    - bsc#953518: Unplug also SCSI disks in qemu-xen

    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 for SAP 12:
      zypper in -t patch SUSE-SLE-SAP-12-2016-1825=1
    • SUSE Linux Enterprise Server 12-LTSS:
      zypper in -t patch SUSE-SLE-SERVER-12-2016-1825=1

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

    Package List:

    • SUSE Linux Enterprise Server for SAP 12 (x86_64):
      • xen-4.4.4_05-22.25.1
      • xen-debugsource-4.4.4_05-22.25.1
      • xen-doc-html-4.4.4_05-22.25.1
      • xen-kmp-default-4.4.4_05_k3.12.60_52.57-22.25.1
      • xen-kmp-default-debuginfo-4.4.4_05_k3.12.60_52.57-22.25.1
      • xen-libs-32bit-4.4.4_05-22.25.1
      • xen-libs-4.4.4_05-22.25.1
      • xen-libs-debuginfo-32bit-4.4.4_05-22.25.1
      • xen-libs-debuginfo-4.4.4_05-22.25.1
      • xen-tools-4.4.4_05-22.25.1
      • xen-tools-debuginfo-4.4.4_05-22.25.1
      • xen-tools-domU-4.4.4_05-22.25.1
      • xen-tools-domU-debuginfo-4.4.4_05-22.25.1
    • SUSE Linux Enterprise Server 12-LTSS (x86_64):
      • xen-4.4.4_05-22.25.1
      • xen-debugsource-4.4.4_05-22.25.1
      • xen-doc-html-4.4.4_05-22.25.1
      • xen-kmp-default-4.4.4_05_k3.12.60_52.57-22.25.1
      • xen-kmp-default-debuginfo-4.4.4_05_k3.12.60_52.57-22.25.1
      • xen-libs-32bit-4.4.4_05-22.25.1
      • xen-libs-4.4.4_05-22.25.1
      • xen-libs-debuginfo-32bit-4.4.4_05-22.25.1
      • xen-libs-debuginfo-4.4.4_05-22.25.1
      • xen-tools-4.4.4_05-22.25.1
      • xen-tools-debuginfo-4.4.4_05-22.25.1
      • xen-tools-domU-4.4.4_05-22.25.1
      • xen-tools-domU-debuginfo-4.4.4_05-22.25.1

    References: