Matthieu Bouthors from #IHTeam.net has discovered that squidGuard 1.4 is vulnerable to multiple buffer overflow attacks.
An attacker might for example use a buffer closely to 4096 characters to bring squidGuard into emergency mode and bypass all filter rules.
SquidGuard is an URL filtering software which is often used with squid, the (caching) proxy server. It is licensed under the GPL .
The vulnerability is assigned to CVE-2009-3700.
Update 2020-01-18:
Replaced the original link to ihteam.net website with link to Packet Storm and provided a CVE link.