Multiple Mozilla products contain a flaw that allows a remote cross-site scripting (XSS) attack. This flaw exists because the application does not validate input passed via the displayed url when an attacker exploits a flaw in docshell's page loading which allows for the manipulation of the displayed URL, which may allow for manipulation of the displayed URL. This may allow a user to create a specially crafted URL that would execute arbitrary script code in a user's browser within the trust relationship between their browser and the server.

Upgrade Firefox and Thunderbird to version 12.0 or higher (10.0.4 for ESR) and SeaMonkey to version 2.9 or higher, as they have been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

• Security Tracker: 1026971 1026972 1026973
• CVE ID: 2012-0474 (see also: NVD)
• Secunia Advisory ID: 48897 48932 48944 48952 48972 48995 49047 49055 49061 50747 51766
• Bugtraq ID: 53228
• Vendor Specific News/Changelog Entry: http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00000.html
  http://lists.opensuse.org/opensuse-updates/2012-04/msg00066.html
  http://www.gentoo.org/security/en/glsa/glsa-201301-01.xml
  http://www.mozilla.org/security/announce/2012/mfsa2012-27.html
  http://www.palemoon.org/releasenotes-ng.shtml
  http://www.ubuntu.com/usn/usn-1430-1
  http://www.ubuntu.com/usn/usn-1430-2
  http://www.ubuntu.com/usn/usn-1430-3/
  https://bugzilla.mozilla.org/show_bug.cgi?id=687745 [ Auth Req'd ]
  https://bugzilla.mozilla.org/show_bug.cgi?id=737307 [ Auth Req'd ]
• Vendor Specific Advisory URL: https://blogs.oracle.com/sunsecurity/entry/multiple_vulnerabilities_in_firefox_web1
• RedHat RHSA: RHSA-2012:0515 RHSA-2012:0516

• Jordi Chancel
• Eddy Bordi
• Chris McGowen