RealtimeKit (aka rtkit) 0.5 does not properly use D-Bus for communication with a polkit authority, which allows local users to bypass intended access restrictions by leveraging a PolkitUnixProcess PolkitSubject race condition via a (1) setuid process or (2) pkexec process, a related issue to CVE-2013-4288.
https://bugzilla.redhat.com/show_bug.cgi?id=1006677
http://www.openwall.com/lists/oss-security/2013/09/18/6
http://rhn.redhat.com/errata/RHSA-2013-1282.html
http://lists.opensuse.org/opensuse-updates/2013-10/msg00051.html
http://lists.opensuse.org/opensuse-updates/2013-10/msg00022.html