CVE-2018-1000027

The Squid Software Foundation Squid HTTP Caching Proxy version prior to
version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP
Response X-Forwarded-For header processing that can result in Denial of
Service to all clients of the proxy. This attack appear to be exploitable
via Remote HTTP server responding with an X-Forwarded-For header to certain
types of HTTP request. This vulnerability appears to have been fixed in
4.0.23 and later.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=888720&gt;