The web interface for CUPS before 1.3.10 does not validate the HTTP Host header in a client request, which makes it easier for remote attackers to conduct DNS rebinding attacks.
http://bugs.gentoo.org/show_bug.cgi?id=263070
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
http://secunia.com/advisories/35074
http://security.gentoo.org/glsa/glsa-200904-20.xml
http://support.apple.com/kb/HT3549
http://wiki.rpath.com/Advisories:rPSA-2009-0061
http://www.cups.org/articles.php?L582
http://www.cups.org/str.php?L3118
http://www.securityfocus.com/archive/1/502750/100/0/threaded
http://www.securityfocus.com/bid/34665
http://www.us-cert.gov/cas/techalerts/TA09-133A.html