Summary
The remote host is missing an update to the system as announced in the referenced advisory.
Solution
Update your system with the appropriate patches or software upgrades.
http://www.hornik.sk/SA/SA-20040802.txt
http://secunia.com/advisories/12156
http://www.vuxml.org/freebsd/84ab58cf-e4ac-11d8-9b0a-000347a4fa7d.html
Insight
The following packages are affected:
gnutls
gnutls-devel