Ubuntu 2826-1: Linux kernel (Trusty HWE) vulnerabilities

    Date03 Dec 2015
    CategoryUbuntu
    32
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2826-1
    December 03, 2015
    
    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
    
    Details:
    
    It was discovered that the SCTP protocol implementation in the Linux kernel
    performed an incorrect sequence of protocol-initialization steps. A local
    attacker could use this to cause a denial of service (system crash).
    (CVE-2015-5283)
    
    Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted
    to garbage collect incompletely instantiated keys. A local unprivileged
    attacker could use this to cause a denial of service (system crash).
    (CVE-2015-7872)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.13.0-71-generic   3.13.0-71.114~precise1
      linux-image-3.13.0-71-generic-lpae  3.13.0-71.114~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. If
    you use linux-restricted-modules, you have to update that package as
    well to get modules which work with the new kernel version. Unless you
    manually uninstalled the standard kernel metapackages (e.g. linux-generic,
    linux-server, linux-powerpc), a standard system upgrade will automatically
    perform this as well.
    
    References:
      http://www.ubuntu.com/usn/usn-2826-1
      CVE-2015-5283, CVE-2015-7872
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-71.114~precise1
    
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