The problem can be corrected by updating your system to the following package versions: Ubuntu 12.10: libpam-xdg-support 0.2-0ubuntu1.1 In general, a standard system update will make all the necessary changes.
https://ubuntu.com/security/notices/USN-1766-1
CVE-2013-1052
https://launchpad.net/ubuntu/+source/pam-xdg-support/0.2-0ubuntu1.1
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