gforge 3.1 and 4.5.14 allows local users to truncate arbitrary files via a symlink attack on temporary files.
https://exchange.xforce.ibmcloud.com/vulnerabilities/38329
http://www.vupen.com/english/advisories/2007/3773
http://www.securityfocus.com/bid/26373
http://www.debian.org/security/2007/dsa-1402
http://secunia.com/advisories/27586