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.time-travellers.org/oftpd/oftpd-dos.html http://www.vuxml.org/freebsd/290d81b9-80f1-11d8-9645-0020ed76ef5a.html

The following package is affected: oftpd CVE-2004-0376 oftpd 0.3.6 and earlier allows remote attackers to cause a denial of service (crash) via a PORT command with a large value.