Sylvain Beucler discovered that gforge, a collaborative development tool, is prone to a symlink attack, which allows local users to perform a denial of service attack by overwriting arbitrary files. For the stable distribution , this problem has been fixed in version 4.7~rc2-7lenny3. The oldstable distribution , this problem has been fixed in version 4.5.14-22etch13. For the testing distribution , this problem will be fixed soon. For the unstable distribution , this problem has been fixed in version 4.8.2-1. We recommend that you upgrade your gforge packages.