gksu-polkit-0.0.3-6.fc18 was reported as fixing the issue in CVE-2012-5617 but the patch was improperly applied and it did not fixed the security issue.

gksu-polkit: permissive PolicyKit policy configuration file allows privilege escalation

In gksu-polkit before 0.0.3, the source file for xauth may contain arbitrary commands that may allow an attacker to overtake an administrator X11 session.