CVE-2013-4394

The SetX11Keyboard function in systemd, when PolicyKit Local Authority
(PKLA) is used to change the group permissions on the X Keyboard Extension
(XKB) layouts description, allows local users in the group to modify the
Xorg X11 Server configuration file and possibly gain privileges via vectors
involving “special and control characters.”

Bugs

• <https://bugzilla.redhat.com/show_bug.cgi?id=862324&gt;
• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=725357&gt;