Ubuntu 2178-1: Linux kernel vulnerabilities

    Date26 Apr 2014
    CategoryUbuntu
    27
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2178-1
    April 26, 2014
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.10
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    A flaw was discovered in the Kernel Virtual Machine (KVM) subsystem of the
    Linux kernel. A guest OS user could exploit this flaw to execute arbitrary
    code on the host OS. (CVE-2014-0049)
    
    Al Viro discovered an error in how CIFS in the Linux kernel handles
    uncached write operations. An unprivileged local user could exploit this
    flaw to cause a denial of service (system crash), obtain sensitive
    information from kernel memory, or possibly gain privileges.
    (CVE-2014-0069)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.10:
      linux-image-3.5.0-49-generic    3.5.0-49.73
      linux-image-3.5.0-49-highbank   3.5.0-49.73
      linux-image-3.5.0-49-omap       3.5.0-49.73
      linux-image-3.5.0-49-powerpc-smp  3.5.0-49.73
      linux-image-3.5.0-49-powerpc64-smp  3.5.0-49.73
    
    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-2178-1
      CVE-2014-0049, CVE-2014-0069
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.5.0-49.73
    
    
    
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