The remote host is missing an update to super announced via advisory DSA 2383-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202383-1

Robert Luberda discovered a buffer overflow in the syslog logging code of Super, a tool to execute scripts (or other commands) as if they were root. The default Debian configuration is not affected. For the oldstable distribution (lenny), this problem has been fixed in version 3.30.0-2+lenny1. Due to a technical limitation in the Debian archive scripts this update cannot be released synchronously with the stable update. It will be available shortly. For the stable distribution (squeeze), this problem has been fixed in version 3.30.0-3+squeeze1. For the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your super packages.