The qmailscan plugin for Munin 1.4.5 allows local users to overwrite arbitrary files via a symlink attack on temporary files with predictable names.
https://exchange.xforce.ibmcloud.com/vulnerabilities/74884
https://bugzilla.redhat.com/show_bug.cgi?id=812889
http://www.ubuntu.com/usn/USN-1622-1
http://www.securityfocus.com/bid/53031
http://www.openwall.com/lists/oss-security/2012/04/16/6
http://www.openwall.com/lists/oss-security/2012/04/16/5
http://secunia.com/advisories/51218