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://archives.neohapsis.com/archives/fulldisclosure/2005-08/0688.html http://www.vuxml.org/freebsd/f66e011d-13ff-11da-af41-0004614cc33d.html
Insight
The following package is affected: elm