A problem exists in the way the remote Squid proxy server handles a
special mkdir-only PUT request, and causes denial of service to the proxy
server.
An attacker may use this flaw to prevent your LAN users from accessing
the web.
Solution: Apply the vendor released patch, for squid it is located here:
www.squid-cache.org. You can also protect yourself by enabling access lists
on your proxy.
*** Note that solely relied on the version number of the remote
*** proxy to issue this warning