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://sourceforge.net/forum/forum.php?forum_id=967583 http://www.vuxml.org/freebsd/70372cda-6771-11de-883a-00e0815b8da8.html
Insight
The following package is affected: nfsen
