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.squid-cache.org/Advisories/SQUID-2009_1.txt http://secunia.com/advisories/33731/ http://www.vuxml.org/freebsd/9c2460a4-f6b1-11dd-94d9-0030843d3802.html

The following package is affected: squid CVE-2009-0478 Squid 2.7 to 2.7.STABLE5, 3.0 to 3.0.STABLE12, and 3.1 to 3.1.0.4 allows remote attackers to cause a denial of service via an HTTP request with an invalid version number, which triggers a reachable assertion in (1) HttpMsg.c and (2) HttpStatusLine.c.