The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://www.freebsd.org/cgi/query-pr.cgi?pr=ports/141852 http://www.vuxml.org/freebsd/4d6076fe-ee7a-11de-9cd0-001a926c7637.html

The following package is affected: fuser