Security update for xen

SUSE Security Update: Security update for xen
Announcement ID: SUSE-SU-2016:2725-1
Rating: important
References: #954872 #961600 #963161 #973188 #973631 #974038 #975130 #975138 #976470 #978164 #978295 #978413 #980716 #980724 #981264 #982224 #982225 #982960 #983984 #985503 #988675 #990843 #990923 #995785 #995792
Affected Products:
  • SUSE OpenStack Cloud 5
  • SUSE Manager Proxy 2.1
  • SUSE Manager 2.1
  • SUSE Linux Enterprise Server 11-SP3-LTSS
  • SUSE Linux Enterprise Point of Sale 11-SP3

  • An update that solves 21 vulnerabilities and has four fixes is now available.

    Description:

    This update for xen fixes several issues.

    These security issues were fixed:
    - CVE-2016-7094: Buffer overflow in Xen allowed local x86 HVM guest OS
    administrators on guests running with shadow paging to cause a denial of
    service via a pagetable update (bsc#995792)
    - CVE-2016-7092: The get_page_from_l3e function in arch/x86/mm.c in Xen
    allowed local 32-bit PV guest OS administrators to gain host OS
    privileges via vectors related to L3 recursive pagetables (bsc#995785)
    - CVE-2016-5403: Unbounded memory allocation allowed a guest administrator
    to cause a denial of service of the host (bsc#990923)
    - CVE-2016-6351: The esp_do_dma function in hw/scsi/esp.c, when built with
    ESP/NCR53C9x controller emulation support, allowed local guest OS
    administrators to cause a denial of service (out-of-bounds write and
    QEMU process crash) or execute arbitrary code on the host via vectors
    involving DMA read into ESP command buffer (bsc#990843)
    - CVE-2016-6258: The PV pagetable code in arch/x86/mm.c in Xen allowed
    local 32-bit PV guest OS administrators to gain host OS privileges by
    leveraging fast-paths for updating pagetable entries (bsc#988675)
    - 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-2016-5238: 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-2016-4453: 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-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-2016-4441: 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-2016-4439: 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-2016-3710: 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-2016-4480: The guest_walk_tables function in
    arch/x86/mm/guest_walk.c in Xen did not properly handle the Page Size
    (PS) page table entry bit at the L4 and L3 page table levels, which
    might have allowed local guest OS users to gain privileges via a crafted
    mapping of memory (bsc#978295)
    - 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-2016-3158: 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-2016-4001: 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)

    These non-security issues were fixed:
    - bsc#985503: vif-route broken
    - bsc#978413: PV guest upgrade from sles11sp4 to sles12sp2 alpha3 failed
    on sles11sp4 xen host.
    - bsc#954872: Script block-dmmd not working as expected - libxl: error:
    libxl_dm.c (another modification)
    - bsc#961600: Poor performance when Xen HVM domU configured with max
    memory > current memory
    - bsc#963161: Windows VM getting stuck during load while a VF is assigned
    to it after upgrading to latest maintenance updates
    - bsc#976470: Xend fails to start
    - bsc#973631: AWS EC2 kdump issue

    Patch Instructions:

    To install this SUSE Security Update use YaST online_update.
    Alternatively you can run the command listed for your product:

    • SUSE OpenStack Cloud 5:
      zypper in -t patch sleclo50sp3-xen-12836=1
    • SUSE Manager Proxy 2.1:
      zypper in -t patch slemap21-xen-12836=1
    • SUSE Manager 2.1:
      zypper in -t patch sleman21-xen-12836=1
    • SUSE Linux Enterprise Server 11-SP3-LTSS:
      zypper in -t patch slessp3-xen-12836=1
    • SUSE Linux Enterprise Point of Sale 11-SP3:
      zypper in -t patch sleposp3-xen-12836=1

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

    Package List:

    • SUSE OpenStack Cloud 5 (x86_64):
      • xen-4.2.5_21-27.1
      • xen-doc-html-4.2.5_21-27.1
      • xen-doc-pdf-4.2.5_21-27.1
      • xen-kmp-default-4.2.5_21_3.0.101_0.47.86-27.1
      • xen-libs-32bit-4.2.5_21-27.1
      • xen-libs-4.2.5_21-27.1
      • xen-tools-4.2.5_21-27.1
      • xen-tools-domU-4.2.5_21-27.1
    • SUSE Manager Proxy 2.1 (x86_64):
      • xen-4.2.5_21-27.1
      • xen-doc-html-4.2.5_21-27.1
      • xen-doc-pdf-4.2.5_21-27.1
      • xen-kmp-default-4.2.5_21_3.0.101_0.47.86-27.1
      • xen-libs-32bit-4.2.5_21-27.1
      • xen-libs-4.2.5_21-27.1
      • xen-tools-4.2.5_21-27.1
      • xen-tools-domU-4.2.5_21-27.1
    • SUSE Manager 2.1 (x86_64):
      • xen-4.2.5_21-27.1
      • xen-doc-html-4.2.5_21-27.1
      • xen-doc-pdf-4.2.5_21-27.1
      • xen-kmp-default-4.2.5_21_3.0.101_0.47.86-27.1
      • xen-libs-32bit-4.2.5_21-27.1
      • xen-libs-4.2.5_21-27.1
      • xen-tools-4.2.5_21-27.1
      • xen-tools-domU-4.2.5_21-27.1
    • SUSE Linux Enterprise Server 11-SP3-LTSS (i586 x86_64):
      • xen-kmp-default-4.2.5_21_3.0.101_0.47.86-27.1
      • xen-libs-4.2.5_21-27.1
      • xen-tools-domU-4.2.5_21-27.1
    • SUSE Linux Enterprise Server 11-SP3-LTSS (x86_64):
      • xen-4.2.5_21-27.1
      • xen-doc-html-4.2.5_21-27.1
      • xen-doc-pdf-4.2.5_21-27.1
      • xen-libs-32bit-4.2.5_21-27.1
      • xen-tools-4.2.5_21-27.1
    • SUSE Linux Enterprise Server 11-SP3-LTSS (i586):
      • xen-kmp-pae-4.2.5_21_3.0.101_0.47.86-27.1
    • SUSE Linux Enterprise Point of Sale 11-SP3 (i586):
      • xen-kmp-default-4.2.5_21_3.0.101_0.47.86-27.1
      • xen-kmp-pae-4.2.5_21_3.0.101_0.47.86-27.1
      • xen-libs-4.2.5_21-27.1
      • xen-tools-domU-4.2.5_21-27.1

    References: