Ubuntu 1950-1: Light Display Manager vulnerability

    Date12 Sep 2013
    91
    Posted ByLinuxSecurity Advisories
    Light Display Manager could be made to expose sensitive information.
    ==========================================================================
    Ubuntu Security Notice USN-1950-1
    September 12, 2013
    
    lightdm vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 13.04
    
    Summary:
    
    Light Display Manager could be made to expose sensitive information.
    
    Software Description:
    - lightdm: Display Manager
    
    Details:
    
    It was discovered that Light Display Manager created .Xauthority files with
    incorrect permissions. A local attacker could use this flaw to bypass
    access restrictions.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 13.04:
      lightdm                         1.6.0-0ubuntu3.1
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://www.ubuntu.com/usn/usn-1950-1
      CVE-2013-4331
    
    Package Information:
      https://launchpad.net/ubuntu/+source/lightdm/1.6.0-0ubuntu3.1
    
    
    

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