Ubuntu 2929-2: Linux kernel (Trusty HWE) vulnerabilities

    Date14 Mar 2016
    CategoryUbuntu
    29
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2929-2
    March 14, 2016
    
    linux-lts-trusty vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise
    
    Details:
    
    Ben Hawkes discovered that the Linux netfilter implementation did not
    correctly perform validation when handling IPT_SO_SET_REPLACE events. A
    local unprivileged attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code with administrative
    privileges. (CVE-2016-3134)
    
    It was discovered that the Linux kernel did not properly enforce rlimits
    for file descriptors sent over UNIX domain sockets. A local attacker could
    use this to cause a denial of service. (CVE-2013-4312)
    
    Ralf Spenneberg discovered that the USB driver for Clie devices in the
    Linux kernel did not properly sanity check the endpoints reported by the
    device. An attacker with physical access could cause a denial of service
    (system crash). (CVE-2015-7566)
    
    Ralf Spenneberg discovered that the usbvision driver in the Linux kernel
    did not properly sanity check the interfaces and endpoints reported by the
    device. An attacker with physical access could cause a denial of service
    (system crash). (CVE-2015-7833)
    
    It was discovered that a race condition existed in the ioctl handler for
    the TTY driver in the Linux kernel. A local attacker could use this to
    cause a denial of service (system crash) or expose sensitive information.
    (CVE-2016-0723)
    
    Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly
    performed a double-free. A local attacker with physical access could use
    this to cause a denial of service (system crash) or possibly execute
    arbitrary code with administrative privileges. (CVE-2016-2384)
    
    Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA)
    framework did not verify that a FIFO was attached to a client before
    attempting to clear it. A local attacker could use this to cause a denial
    of service (system crash). (CVE-2016-2543)
    
    Dmitry Vyukov discovered that a race condition existed in the Advanced
    Linux Sound Architecture (ALSA) framework between timer setup and closing
    of the client, resulting in a use-after-free. A local attacker could use
    this to cause a denial of service. (CVE-2016-2544)
    
    Dmitry Vyukov discovered a race condition in the timer handling
    implementation of the Advanced Linux Sound Architecture (ALSA) framework,
    resulting in a use-after-free. A local attacker could use this to cause a
    denial of service (system crash). (CVE-2016-2545)
    
    Dmitry Vyukov discovered race conditions in the Advanced Linux Sound
    Architecture (ALSA) framework's timer ioctls leading to a use-after-free. A
    local attacker could use this to cause a denial of service (system crash)
    or possibly execute arbitrary code. (CVE-2016-2546)
    
    Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA)
    framework's handling of high resolution timers did not properly manage its
    data structures. A local attacker could use this to cause a denial of
    service (system hang or crash) or possibly execute arbitrary code.
    (CVE-2016-2547, CVE-2016-2548)
    
    Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA)
    framework's handling of high resolution timers could lead to a deadlock
    condition. A local attacker could use this to cause a denial of service
    (system hang). (CVE-2016-2549)
    
    Ralf Spenneberg discovered that the USB driver for Treo devices in the
    Linux kernel did not properly sanity check the endpoints reported by the
    device. An attacker with physical access could cause a denial of service
    (system crash). (CVE-2016-2782)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.13.0-83-generic   3.13.0-83.127~precise1
      linux-image-3.13.0-83-generic-lpae  3.13.0-83.127~precise1
    
    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-2929-2
      http://www.ubuntu.com/usn/usn-2929-1
      CVE-2013-4312, CVE-2015-7566, CVE-2015-7833, CVE-2016-0723,
      CVE-2016-2384, CVE-2016-2543, CVE-2016-2544, CVE-2016-2545,
      CVE-2016-2546, CVE-2016-2547, CVE-2016-2548, CVE-2016-2549,
      CVE-2016-2782, CVE-2016-3134
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-83.127~precise1
    
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