The remote host is missing an update to spip announced via advisory DSA 2229-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202229-1

A vulnerability has been found in SPIP, a website engine for publishing, which allows a malicious registered author to disconnect the website from its database, resulting in denial of service. The oldstable distribution (lenny) doesn't include spip. For the stable distribution (squeeze), this problem has been fixed in version 2.1.1-3squeeze1. The unstable distribution (sid) will be fixed soon. We recommend that you upgrade your spip packages.