firefox is vulnerable to insecure HTTP headers. The vulnerability exists as a flaw was found in the way Firefox handled pages with multiple Content Security Policy (CSP) headers. This could lead to a cross-site scripting attack if used in conjunction with a website that has a header injection flaw.
lists.opensuse.org/opensuse-security-announce/2012-03/msg00014.html
lists.opensuse.org/opensuse-updates/2012-03/msg00042.html
rhn.redhat.com/errata/RHSA-2012-0387.html
rhn.redhat.com/errata/RHSA-2012-0388.html
secunia.com/advisories/48359
secunia.com/advisories/48402
secunia.com/advisories/48496
secunia.com/advisories/48513
secunia.com/advisories/48553
secunia.com/advisories/48561
secunia.com/advisories/48629
secunia.com/advisories/49055
www.mandriva.com/security/advisories?name=MDVSA-2012:032
www.mozilla.org/security/announce/2012/mfsa2012-15.html
www.mozilla.org/security/known-vulnerabilities/firefoxESR.html
www.securityfocus.com/bid/52463
www.securitytracker.com/id?1026801
www.securitytracker.com/id?1026803
www.securitytracker.com/id?1026804
www.ubuntu.com/usn/USN-1400-1
www.ubuntu.com/usn/USN-1400-2
www.ubuntu.com/usn/USN-1400-3
www.ubuntu.com/usn/USN-1400-4
www.ubuntu.com/usn/USN-1400-5
access.redhat.com/errata/RHSA-2012:0387
access.redhat.com/security/updates/classification/#critical
bugzilla.mozilla.org/show_bug.cgi?id=717511
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14909
rhn.redhat.com/errata/RHEA-2012-0327.html