This script is Copyright (C) 2005-2013 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
The squid patches page notes :
WCCP_I_SEE_YOU messages contain a 'number of caches' field which
should be between 1 and 32. Values outside that range may crash Squid
if WCCP is enabled, and if an attacker can spoof UDP packets with the
WCCP router's IP address.
See also :
Update the affected package.
Risk factor :
Medium / CVSS Base Score : 5.0