The remote host is missing an update to super announced via advisory DSA 522-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20522-1

Max Vozeler discovered a format string vulnerability in super, a program to allow specified users to execute commands with root privileges. This vulnerability could potentially be exploited by a local user to execute arbitrary code with root privileges. For the current stable distribution (woody), this problem has been fixed in version 3.16.1-1.2. For the unstable distribution (sid), this problem will has been fixed in version 3.23.0-1. We recommend that you update your super package.