Ubuntu 2978-1: Linux kernel vulnerabilities

    Date16 May 2016
    CategoryUbuntu
    137
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2978-1
    May 16, 2016
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.10
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    David Matlack discovered that the Kernel-based Virtual Machine (KVM)
    implementation in the Linux kernel did not properly restrict variable
    Memory Type Range Registers (MTRR) in KVM guests. A privileged user in a
    guest VM could use this to cause a denial of service (system crash) in the
    host, expose sensitive information from the host, or possibly gain
    administrative privileges in the host. (CVE-2016-3713)
    
    Philip Pettersson discovered that the Linux kernel's ASN.1 DER decoder did
    not properly process certificate files with tags of indefinite length. A
    local unprivileged attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code with administrative
    privileges. (CVE-2016-0758)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.10:
      linux-image-4.2.0-36-generic    4.2.0-36.42
      linux-image-4.2.0-36-generic-lpae  4.2.0-36.42
      linux-image-4.2.0-36-lowlatency  4.2.0-36.42
      linux-image-4.2.0-36-powerpc-e500mc  4.2.0-36.42
      linux-image-4.2.0-36-powerpc-smp  4.2.0-36.42
      linux-image-4.2.0-36-powerpc64-emb  4.2.0-36.42
      linux-image-4.2.0-36-powerpc64-smp  4.2.0-36.42
    
    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-2978-1
      CVE-2016-0758, CVE-2016-3713
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.2.0-36.42
    
    You are not authorised to post comments.

    Comments powered by CComment

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"25","type":"x","order":"1","pct":54.35,"resources":[]},{"id":"88","title":"Should be more technical","votes":"5","type":"x","order":"2","pct":10.87,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"16","type":"x","order":"3","pct":34.78,"resources":[]}]["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"]["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"]350
    bottom200

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.