Ubuntu 3234-2: Linux kernel (Xenial HWE) vulnerabilities

    Date15 Mar 2017
    CategoryUbuntu
    43
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3234-2
    March 15, 2017
    
    linux-lts-xenial vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
    
    Details:
    
    USN-3234-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
    14.04 LTS.
    
    Ralf Spenneberg discovered that the ext4 implementation in the Linux kernel
    did not properly validate meta block groups. An attacker with physical
    access could use this to specially craft an ext4 image that causes a denial
    of service (system crash). (CVE-2016-10208)
    
    It was discovered that the Linux kernel did not clear the setgid bit during
    a setxattr call on a tmpfs filesystem. A local attacker could use this to
    gain elevated group privileges. (CVE-2017-5551)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-4.4.0-67-generic    4.4.0-67.88~14.04.1
      linux-image-4.4.0-67-generic-lpae  4.4.0-67.88~14.04.1
      linux-image-4.4.0-67-lowlatency  4.4.0-67.88~14.04.1
      linux-image-4.4.0-67-powerpc-e500mc  4.4.0-67.88~14.04.1
      linux-image-4.4.0-67-powerpc-smp  4.4.0-67.88~14.04.1
      linux-image-4.4.0-67-powerpc64-emb  4.4.0-67.88~14.04.1
      linux-image-4.4.0-67-powerpc64-smp  4.4.0-67.88~14.04.1
      linux-image-generic-lpae-lts-xenial  4.4.0.67.54
      linux-image-generic-lts-xenial  4.4.0.67.54
      linux-image-lowlatency-lts-xenial  4.4.0.67.54
      linux-image-powerpc-e500mc-lts-xenial  4.4.0.67.54
      linux-image-powerpc-smp-lts-xenial  4.4.0.67.54
      linux-image-powerpc64-emb-lts-xenial  4.4.0.67.54
      linux-image-powerpc64-smp-lts-xenial  4.4.0.67.54
    
    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-3234-2
      http://www.ubuntu.com/usn/usn-3234-1
      CVE-2016-10208, CVE-2017-5551
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-67.88~14.04.1
    
    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":"23","type":"x","order":"1","pct":56.1,"resources":[]},{"id":"88","title":"Should be more technical","votes":"5","type":"x","order":"2","pct":12.2,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"13","type":"x","order":"3","pct":31.71,"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

    Advisories

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