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.kame.net/dev/cvsweb2.cgi/kame/kame/kame/racoon/isakmp.c.diff?r1=1.180&r2=1.181 http://www.vuxml.org/freebsd/ccd698df-8e20-11d8-90d1-0020ed76ef5a.html

The following package is affected: racoon CVE-2004-0403 Racoon before 20040408a allows remote attackers to cause a denial of service (memory consumption) via an ISAKMP packet with a large length field.