Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2016:2100-1
Rating: important
References: #954872 #955399 #957986 #958848 #961600 #963161 #964427 #967630 #973188 #974038 #974912 #975130 #975138 #975907 #976058 #976111 #978164 #978295 #978413 #979035 #979620 #979670 #980716 #980724 #981264 #981276 #982024 #982025 #982026 #982224 #982225 #982286 #982695 #982960 #983973 #983984 #985503 #986586 #988675 #989235 #990843 #990923
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 26 vulnerabilities and has 16 fixes is now available.

    Description:

    This update for xen fixes the several issues.

    These security issues were fixed:
    - CVE-2014-3672: The qemu implementation in libvirt Xen allowed local
    guest OS users to cause a denial of service (host disk consumption) by
    writing to stdout or stderr (bsc#981264).
    - CVE-2016-3158: The xrstor function did not properly handle writes to the
    hardware FSW.ES bit when running on AMD64 processors, which allowed
    local guest OS users to obtain sensitive register content information
    from another guest by leveraging pending exception and mask bits
    (bsc#973188).
    - CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387.c did not
    properly handle writes to the hardware FSW.ES bit when running on AMD64
    processors, which allowed local guest OS users to obtain sensitive
    register content information from another guest by leveraging pending
    exception and mask bits (bsc#973188).
    - CVE-2016-3710: The VGA module improperly performed bounds checking on
    banked access to video memory, which allowed local guest OS
    administrators to execute arbitrary code on the host by changing access
    modes after setting the bank register, aka the "Dark Portal" issue
    (bsc#978164).
    - CVE-2016-3960: Integer overflow in the x86 shadow pagetable code allowed
    local guest OS users to cause a denial of service (host crash) or
    possibly gain privileges by shadowing a superpage mapping (bsc#974038).
    - CVE-2016-4001: Buffer overflow in the stellaris_enet_receive function,
    when the Stellaris ethernet controller is configured to accept large
    packets, allowed remote attackers to cause a denial of service (QEMU
    crash) via a large packet (bsc#975130).
    - CVE-2016-4002: Buffer overflow in the mipsnet_receive function, when the
    guest NIC is configured to accept large packets, allowed remote
    attackers to cause a denial of service (memory corruption and QEMU
    crash) or possibly execute arbitrary code via a packet larger than 1514
    bytes (bsc#975138).
    - CVE-2016-4020: The patch_instruction function did not initialize the
    imm32 variable, which allowed local guest OS administrators to obtain
    sensitive information from host stack memory by accessing the Task
    Priority Register (TPR) (bsc#975907).
    - CVE-2016-4037: The ehci_advance_state function in hw/usb/hcd-ehci.c
    allowed local guest OS administrators to cause a denial of service
    (infinite loop and CPU consumption) via a circular split isochronous
    transfer descriptor (siTD) list (bsc#976111).
    - CVE-2016-4439: The esp_reg_write function in the 53C9X Fast SCSI
    Controller (FSC) support did not properly check command buffer length,
    which allowed local guest OS administrators to cause a denial of service
    (out-of-bounds write and QEMU process crash) or potentially execute
    arbitrary code on the host via unspecified vectors (bsc#980716).
    - CVE-2016-4441: The get_cmd function in the 53C9X Fast SCSI Controller
    (FSC) support did not properly check DMA length, which allowed local
    guest OS administrators to cause a denial of service (out-of-bounds
    write and QEMU process crash) via unspecified vectors, involving an SCSI
    command (bsc#980724).
    - CVE-2016-4453: The vmsvga_fifo_run function allowed local guest OS
    administrators to cause a denial of service (infinite loop and QEMU
    process crash) via a VGA command (bsc#982225).
    - CVE-2016-4454: The vmsvga_fifo_read_raw function allowed local guest OS
    administrators to obtain sensitive host memory information or cause a
    denial of service (QEMU process crash) by changing FIFO registers and
    issuing a VGA command, which triggered an out-of-bounds read
    (bsc#982224).
    - CVE-2016-4952: Out-of-bounds access issue in pvsci_ring_init_msg/data
    routines (bsc#981276).
    - CVE-2016-4962: The libxl device-handling allowed local OS guest
    administrators to cause a denial of service (resource consumption or
    management facility confusion) or gain host OS privileges by
    manipulating information in guest controlled areas of xenstore
    (bsc#979620).
    - CVE-2016-4963: The libxl device-handling allowed local guest OS users
    with access to the driver domain to cause a denial of service
    (management tool confusion) by manipulating information in the backend
    directories in xenstore (bsc#979670).
    - CVE-2016-5105: Stack information leakage while reading configuration
    (bsc#982024).
    - CVE-2016-5106: Out-of-bounds write while setting controller properties
    (bsc#982025).
    - CVE-2016-5107: Out-of-bounds read in megasas_lookup_frame() function
    (bsc#982026).
    - CVE-2016-5126: Heap-based buffer overflow in the iscsi_aio_ioctl
    function allowed local guest OS users to cause a denial of service (QEMU
    process crash) or possibly execute arbitrary code via a crafted iSCSI
    asynchronous I/O ioctl call (bsc#982286).
    - CVE-2016-5238: The get_cmd function in hw/scsi/esp.c might have allowed
    local guest OS administrators to cause a denial of service
    (out-of-bounds write and QEMU process crash) via vectors related to
    reading from the information transfer buffer in non-DMA mode
    (bsc#982960).
    - CVE-2016-5337: The megasas_ctrl_get_info function allowed local guest OS
    administrators to obtain sensitive host memory information via vectors
    related to reading device control information (bsc#983973).
    - CVE-2016-5338: The (1) esp_reg_read and (2) esp_reg_write functions
    allowed local guest OS administrators to cause a denial of service (QEMU
    process crash) or execute arbitrary code on the host via vectors related
    to the information transfer buffer (bsc#983984).
    - CVE-2016-6258: Potential privilege escalation in PV guests (XSA-182)
    (bsc#988675).
    - bsc#978295: x86 software guest page walk PS bit handling flaw (XSA-176)
    - CVE-2016-5403: virtio: unbounded memory allocation on host via guest
    leading to DoS (XSA-184) (bsc#990923)
    - CVE-2016-6351: scsi: esp: OOB write access in esp_do_dma (bsc#990843)

    These non-security issues were fixed:
    - bsc#954872: Script block-dmmd not working as expected - libxl: error:
    libxl_dm.c
    - bsc#957986: Indirect descriptors are not compatible with Amazon block
    backend
    - bsc#958848: HVM guest crash at
    /usr/src/packages/BUILD/xen-4.4.2-testing/obj/default/balloon/balloon.c:407

    - bsc#961600: Poor performance when Xen HVM domU configured with max
    memory greater than current memory
    - bsc#963161: Windows VM getting stuck during load while a VF is assigned
    to it after upgrading to latest maintenance updates
    - bsc#964427: Discarding device blocks: failed - Input/output error
    - bsc#976058: Xen error running simple HVM guest (Post Alpha 2 xen+qemu)
    - bsc#982695: qemu fails to boot HVM guest from xvda
    - bsc#986586: Out of memory (oom) during boot on "modprobe xenblk" (non
    xen kernel)
    - bsc#967630: Discrepancy in reported memory size with correction XSA-153
    for xend. Additional memory adjustment made.
    - bsc#974912: Persistent performance drop after live-migration using xend
    tool stack
    - bsc#979035: Restore xm migrate fixes for bsc#955399/ bsc#955399
    - bsc#989235: xen dom0 xm create command only searched /etc/xen instead of
    /etc/xen/vm
    - Live Migration SLES 11 SP3 to SP4 on AMD: "xc: error: Couldn't set
    extended vcpu0 info"
    - bsc#985503: Fixed vif-route
    - bsc#978413: PV guest upgrade from SLES11 SP4 to SLES 12 SP2 alpha3 failed

    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 11-SP4:
      zypper in -t patch sdksp4-xen-12702=1
    • SUSE Linux Enterprise Server 11-SP4:
      zypper in -t patch slessp4-xen-12702=1
    • SUSE Linux Enterprise Debuginfo 11-SP4:
      zypper in -t patch dbgsp4-xen-12702=1

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

    Package List:

    • SUSE Linux Enterprise Software Development Kit 11-SP4 (i586 x86_64):
      • xen-devel-4.4.4_07-37.1
    • SUSE Linux Enterprise Server 11-SP4 (i586 x86_64):
      • xen-kmp-default-4.4.4_07_3.0.101_77-37.1
      • xen-libs-4.4.4_07-37.1
      • xen-tools-domU-4.4.4_07-37.1
    • SUSE Linux Enterprise Server 11-SP4 (x86_64):
      • xen-4.4.4_07-37.1
      • xen-doc-html-4.4.4_07-37.1
      • xen-libs-32bit-4.4.4_07-37.1
      • xen-tools-4.4.4_07-37.1
    • SUSE Linux Enterprise Server 11-SP4 (i586):
      • xen-kmp-pae-4.4.4_07_3.0.101_77-37.1
    • SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):
      • xen-debuginfo-4.4.4_07-37.1
      • xen-debugsource-4.4.4_07-37.1

    References: