The remote host is missing an update to gforge announced via advisory DSA 1402-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201402-1

Steve Kemp from the Debian Security Audit project discovered that gforge, a collaborative development tool, used temporary files insecurely which could allow local users to truncate files upon the system with the privileges of the gforge user, or create a denial of service attack. For the stable distribution (etch), this problem has been fixed in version 4.5.14-22etch3. For the old stable distribution (sarge), this problem has been fixed in version 3.1-31sarge4. We recommend that you upgrade your gforge package.