Race condition in PolicyKit (aka polkit) allows local users to bypass intended PolicyKit restrictions and gain privileges by starting a setuid or pkexec process before the authorization check is performed, related to (1) the polkit_unix_process_new API function, (2) the dbus API, or (3) the --process (unix-process) option for authorization to pkcheck.
bugzilla.redhat.com/bugzilla/show_bug.cgi?id=1002375
lists.opensuse.org/opensuse-updates/2013-10/msg00004.html
lists.opensuse.org/opensuse-updates/2013-10/msg00005.html
lists.opensuse.org/opensuse-updates/2013-10/msg00062.html
lists.opensuse.org/opensuse-updates/2013-11/msg00000.html
rhn.redhat.com/errata/RHSA-2013-1270.html
rhn.redhat.com/errata/RHSA-2013-1460.html
seclists.org/oss-sec/2013/q3/626
www.openwall.com/lists/oss-security/2013/09/18/4
www.ubuntu.com/usn/USN-1953-1