The remote host is missing an update to squid announced via advisory DSA 651-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20651-1

Several vulnerabilities have been discovered in Squid, the internet object cache, the popular WWW proxy cache. The Common Vulnerabilities and Exposures Project identifies the following vulnerabilities: CVE-2005-0094 infamous41md discovered a buffer overflow in the parser for Gopher responses which will lead to memory corruption and usually crash Squid. CVE-2005-0095 infamous41md discovered an integer overflow in the receiver of WCCP (Web Cache Communication Protocol) messages. An attacker could send a specially crafted UDP datagram that will cause Squid to crash. For the stable distribution (woody) these problems have been fixed in version 2.4.6-2woody5. For the unstable distribution (sid) these problems have been fixed in version 2.5.7-4. We recommend that you upgrade your squid package.