CVE-2012-2213
** DISPUTED ** Squid 3.1.9 allows remote attackers to bypass the access configuration for the CONNECT method by providing an arbitrary allowed hostname in the Host HTTP header. NOTE: this issue might not be reproducible, because the researcher is unable to provide a squid.conf file for a vulnerable system, and the observed behavior is consistent with a squid.conf file that was (perhaps inadvertently) designed to allow access based on a "req_header Host" acl regex that matches www.uol.com.br.
Date published : 2012-04-28
http://archives.neohapsis.com/archives/bugtraq/2012-04/0117.html
http://archives.neohapsis.com/archives/bugtraq/2012-04/0131.html