Ubuntu alert USN-1950-1 (lightdm)

From:
    	     
 
Marc Deslauriers <marc.deslauriers@canonical.com> 
To:
    	     
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	     
 
[USN-1950-1] Light Display Manager vulnerability 
Date:
    	     
 
Thu, 12 Sep 2013 11:30:28 -0400
Message-ID:
    	     
 
<5231DE14.9050305@canonical.com>
Archive-link:
    	     
 
Article, Thread
              
==========================================================================
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:
  http://www.ubuntu.com/usn/usn-1950-1

  CVE-2013-4331

Package Information:
  https://launchpad.net/ubuntu/+source/lightdm/1.6.0-0ubunt...


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