Multiple buffer overflows in squidGuard 1.4 allow remote attackers to bypass intended URL blocking via a long URL, related to (1) the relationship between a certain buffer size in squidGuard and a certain buffer size in Squid and (2) a redirect URL that contains information about the originally requested URL.
https://exchange.xforce.ibmcloud.com/vulnerabilities/53922
http://www.vupen.com/english/advisories/2010/1043
http://www.vupen.com/english/advisories/2009/3013
http://www.squidguard.org/Downloads/Patches/1.4/Readme.Patch-20091019
http://www.securityfocus.com/bid/36800
http://www.securityfocus.com/archive/1/507440/100/0/threaded
http://www.debian.org/security/2010/dsa-2040
http://securitytracker.com/id?1023079
http://secunia.com/advisories/39679
http://secunia.com/advisories/37107
http://lists.opensuse.org/opensuse-security-announce/2010-08/msg00001.html