The remote host is missing an update to egroupware announced via advisory DSA 747-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20747-1

A vulernability has been identified in the xmlrpc library included in the egroupware package. This vulnerability could lead to the execution of arbitrary commands on the server running egroupware. The old stable distribution (woody) did not include egroupware. For the current stable distribution (sarge), this problem is fixed in version 1.0.0.007-2.dfsg-2sarge1. For the unstable distribution (sid), this problem is fixed in version 1.0.0.007-3.dfsg-1. We recommend that you upgrade your egroupware package.