expn in the am-utils and net-fs packages for Gentoo, rPath Linux, and other distributions, allows local users to overwrite arbitrary files via a symlink attack on the expn[PID] temporary file. NOTE: this is the same issue as CVE-2003-0308.1.
https://www.redhat.com/archives/fedora-package-announce/2009-January/msg00273.html
https://issues.rpath.com/browse/RPL-2255
http://www.securityfocus.com/bid/28044
http://www.securityfocus.com/archive/1/488931/100/0/threaded
http://www.gentoo.org/security/en/glsa/glsa-200804-09.xml
http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0088
http://secunia.com/advisories/33400
http://secunia.com/advisories/29694