The remote host is missing an update to squid announced via advisory USN-724-1. Joshua Morin, Mikko Varpiola and Jukka Taimisto discovered that Squid did not properly validate the HTTP version when processing requests. A remote attacker could exploit this to cause a denial of service (assertion failure).

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.10: squid 2.7.STABLE3-1ubuntu2.1 In general, a standard system upgrade is sufficient to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-724-1