Insecure usage of chown for temporary file allows to change ownersip of arbitrary file.
CVE:
CVE-2007-3103 (The init.d script for the X.Org X11 xfs font server on Red Hat Enterprise Linux (RHEL) 4 and 5 before 20070712, and Fedora Core 6, might allow local users to change the permissions of arbitrary files via a symlink attack on the /tmp/.font-unix temporary file.)