Ubuntu 2870-1: Linux kernel vulnerability

    Date19 Jan 2016
    CategoryUbuntu
    25
    Posted ByLinuxSecurity Advisories
    The system could be made to crash or run programs as an administrator.
    ==========================================================================
    Ubuntu Security Notice USN-2870-1
    January 19, 2016
    
    linux vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    The system could be made to crash or run programs as an administrator.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    Yevgeny Pats discovered that the session keyring implementation in the
    Linux kernel did not properly reference count when joining an existing
    session keyring. A local attacker could use this to cause a denial of
    service (system crash) or possibly execute arbitrary code with
    administrative privileges.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.13.0-76-generic   3.13.0-76.120
      linux-image-3.13.0-76-generic-lpae  3.13.0-76.120
      linux-image-3.13.0-76-lowlatency  3.13.0-76.120
      linux-image-3.13.0-76-powerpc-e500  3.13.0-76.120
      linux-image-3.13.0-76-powerpc-e500mc  3.13.0-76.120
      linux-image-3.13.0-76-powerpc-smp  3.13.0-76.120
      linux-image-3.13.0-76-powerpc64-emb  3.13.0-76.120
      linux-image-3.13.0-76-powerpc64-smp  3.13.0-76.120
    
    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-2870-1
      CVE-2016-0728
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.13.0-76.120
    
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