xferfaxstats in HylaFax 4.2.1 and earlier allows local users to overwrite arbitrary files via a symlink attack on the xferfax$$ temporary file.
http://www.securityfocus.com/bid/14907
http://www.mandriva.com/security/advisories?name=MDKSA-2005:177
http://www.gentoo.org/security/en/glsa/glsa-200509-21.xml
http://www.debian.org/security/2005/dsa-865
http://secunia.com/advisories/17187
http://secunia.com/advisories/17107
http://secunia.com/advisories/17022