bogopass in bogofilter 0.9.0.4 allows local users to overwrite arbitrary files via a symlink attack on the bogopass temporary file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/10726
http://www.securityfocus.com/bid/6278
http://archives.neohapsis.com/archives/bugtraq/2002-11/0367.html