client_side_request.cc in Squid 3.2.x before 3.2.13 and 3.3.x before 3.3.8 allows remote attackers to cause a denial of service via a crafted port number in a HTTP Host header.
http://www.squid-cache.org/Versions/v3/3.3/changesets/squid-3.3-12591.patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/squid-3.2-11826.patch
http://www.squid-cache.org/Advisories/SQUID-2013_3.txt
http://secunia.com/advisories/54834
http://secunia.com/advisories/54142
http://lists.opensuse.org/opensuse-updates/2013-09/msg00024.html