CVE-2012-1961

Name of the Vulnerable Software and Affected Versions Mozilla Firefox versions 4.x through 13.0 Firefox ESR versions 10.x before 10.0.6 Thunderbird versions 5.0 through 13.0 Thunderbird ESR versions 10.x before 10.0.6 SeaMonkey versions prior to 2.11

Description The issue arises from the improper handling of duplicate values in X-Frame-Options headers, making it easier for remote attackers to conduct clickjacking attacks via a FRAME element referencing a web site that produces these duplicate values.

Recommendations For Mozilla Firefox versions 4.x through 13.0, update to a version after 13.0. For Firefox ESR versions 10.x before 10.0.6, update to version 10.0.6 or later. For Thunderbird versions 5.0 through 13.0, update to a version after 13.0. For Thunderbird ESR versions 10.x before 10.0.6, update to version 10.0.6 or later. For SeaMonkey versions prior to 2.11, update to version 2.11 or later.