The remote host is missing an update to lyskom-server announced via advisory DSA 318-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20318-1

Calle Dybedahl discovered a bug in lyskom-server which could result in a denial of service where an unauthenticated user could cause the server to become unresponsive as it processes a large query. For the stable distribution (woody) this problem has been fixed in version 2.0.6-1woody1. The old stable distribution (potato) does not contain a lyskom-server package. For the unstable distribution (sid) this problem is fixed in version 2.0.7-2. We recommend that you update your lyskom-server package.