The remote host is missing an update to the system as announced in the referenced advisory.
The following package is affected: squid
CVE-2005-0211 Buffer overflow in wccp.c in Squid 2.5 before 2.5.STABLE7 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long WCCP packet, which is processed by a recvfrom function call that uses an incorrect length parameter.
Solution: Update your system with the appropriate patches or software upgrades.