Ubuntu 2748-1: Linux kernel vulnerabilities

    Date28 Sep 2015
    CategoryUbuntu
    63
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2748-1
    September 28, 2015
    
    linux 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: Linux kernel
    
    Details:
    
    Benjamin Randazzo discovered an information leak in the md (multiple
    device) driver when the bitmap_info.file is disabled. A local privileged
    attacker could use this to obtain sensitive information from the kernel.
    (CVE-2015-5697)
    
    Marc-André Lureau discovered that the vhost driver did not properly
    release the userspace provided log file descriptor. A privileged attacker
    could use this to cause a denial of service (resource exhaustion).
    (CVE-2015-6252)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.13.0-65-generic   3.13.0-65.105
      linux-image-3.13.0-65-generic-lpae  3.13.0-65.105
      linux-image-3.13.0-65-lowlatency  3.13.0-65.105
      linux-image-3.13.0-65-powerpc-e500  3.13.0-65.105
      linux-image-3.13.0-65-powerpc-e500mc  3.13.0-65.105
      linux-image-3.13.0-65-powerpc-smp  3.13.0-65.105
      linux-image-3.13.0-65-powerpc64-emb  3.13.0-65.105
      linux-image-3.13.0-65-powerpc64-smp  3.13.0-65.105
    
    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-2748-1
      CVE-2015-5697, CVE-2015-6252
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.13.0-65.105
    
    
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