Ubuntu 2989-1: Linux kernel vulnerabilities

    Date01 Jun 2016
    CategoryUbuntu
    54
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2989-1
    June 01, 2016
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    Justin Yackoski discovered that the Atheros L2 Ethernet Driver in the Linux
    kernel incorrectly enables scatter/gather I/O. A remote attacker could use
    this to obtain potentially sensitive information from kernel memory.
    (CVE-2016-2117)
    
    Jason A. Donenfeld discovered multiple out-of-bounds reads in the OZMO USB
    over wifi device drivers in the Linux kernel. A remote attacker could use
    this to cause a denial of service (system crash) or obtain potentially
    sensitive information from kernel memory. (CVE-2015-4004)
    
    Andy Lutomirski discovered a race condition in the Linux kernel's
    translation lookaside buffer (TLB) handling of flush events. A local
    attacker could use this to cause a denial of service or possibly leak
    sensitive information. (CVE-2016-2069)
    
    Ralf Spenneberg discovered that the Linux kernel's GTCO digitizer USB
    device driver did not properly validate endpoint descriptors. An attacker
    with physical access could use this to cause a denial of service (system
    crash). (CVE-2016-2187)
    
    Hector Marco and Ismael Ripoll discovered that the Linux kernel would
    improperly disable Address Space Layout Randomization (ASLR) for x86
    processes running in 32 bit mode if stack-consumption resource limits were
    disabled. A local attacker could use this to make it easier to exploit an
    existing vulnerability in a setuid/setgid program. (CVE-2016-3672)
    
    Andrey Konovalov discovered that the CDC Network Control Model USB driver
    in the Linux kernel did not cancel work events queued if a later error
    occurred, resulting in a use-after-free. An attacker with physical access
    could use this to cause a denial of service (system crash). (CVE-2016-3951)
    
    It was discovered that an out-of-bounds write could occur when handling
    incoming packets in the USB/IP implementation in the Linux kernel. A remote
    attacker could use this to cause a denial of service (system crash) or
    possibly execute arbitrary code. (CVE-2016-3955)
    
    Kangjie Lu discovered an information leak in the ANSI/IEEE 802.2 LLC type 2
    Support implementations in the Linux kernel. A local attacker could use
    this to obtain potentially sensitive information from kernel memory.
    (CVE-2016-4485)
    
    Kangjie Lu discovered an information leak in the routing netlink socket
    interface (rtnetlink) implementation in the Linux kernel. A local attacker
    could use this to obtain potentially sensitive information from kernel
    memory. (CVE-2016-4486)
    
    It was discovered that in some situations the Linux kernel did not handle
    propagated mounts correctly. A local unprivileged attacker could use this
    to cause a denial of service (system crash). (CVE-2016-4581)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.13.0-87-generic   3.13.0-87.133
      linux-image-3.13.0-87-generic-lpae  3.13.0-87.133
      linux-image-3.13.0-87-lowlatency  3.13.0-87.133
      linux-image-3.13.0-87-powerpc-e500  3.13.0-87.133
      linux-image-3.13.0-87-powerpc-e500mc  3.13.0-87.133
      linux-image-3.13.0-87-powerpc-smp  3.13.0-87.133
      linux-image-3.13.0-87-powerpc64-emb  3.13.0-87.133
      linux-image-3.13.0-87-powerpc64-smp  3.13.0-87.133
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.
    
    References:
      http://www.ubuntu.com/usn/usn-2989-1
      CVE-2015-4004, CVE-2016-2069, CVE-2016-2117, CVE-2016-2187,
      CVE-2016-3672, CVE-2016-3951, CVE-2016-3955, CVE-2016-4485,
      CVE-2016-4486, CVE-2016-4581
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.13.0-87.133
    
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