Ubuntu 3126-1: Linux kernel vulnerabilities

    Date 11 Nov 2016
    100
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3126-1
    November 11, 2016
    
    linux 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: Linux kernel
    
    Details:
    
    Ondrej Kozina discovered that the keyring interface in the Linux kernel
    contained a buffer overflow when displaying timeout events via the
    /proc/keys interface. A local attacker could use this to cause a denial of
    service (system crash). (CVE-2016-7042)
    
    Dmitry Vyukov discovered a use-after-free vulnerability during error
    processing in the recvmmsg(2) 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-2016-7117)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.2.0-115-generic   3.2.0-115.157
      linux-image-3.2.0-115-generic-pae  3.2.0-115.157
      linux-image-3.2.0-115-highbank  3.2.0-115.157
      linux-image-3.2.0-115-omap      3.2.0-115.157
      linux-image-3.2.0-115-powerpc-smp  3.2.0-115.157
      linux-image-3.2.0-115-powerpc64-smp  3.2.0-115.157
      linux-image-3.2.0-115-virtual   3.2.0-115.157
      linux-image-generic             3.2.0.115.131
      linux-image-generic-pae         3.2.0.115.131
      linux-image-highbank            3.2.0.115.131
      linux-image-omap                3.2.0.115.131
      linux-image-powerpc             3.2.0.115.131
      linux-image-powerpc-smp         3.2.0.115.131
      linux-image-powerpc64-smp       3.2.0.115.131
      linux-image-virtual             3.2.0.115.131
    
    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:
      https://www.ubuntu.com/usn/usn-3126-1
      CVE-2016-7042, CVE-2016-7117
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157
    

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