Description
Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 do not properly handle duplicate values in X-Frame-Options headers, which makes it easier for remote attackers to conduct clickjacking attacks via a FRAME element referencing a web site that produces these duplicate values.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox +3 | 10.0.6-1.el6_3 | RHSA-2012:1089, RHSA-2012:1088 |
| RHEL 5 | firefox +1 | 10.0.6-1.el5_8 | RHSA-2012:1089, RHSA-2012:1088 |
| RHEL 5 | xulrunner +1 | 10.0.6-2.el5_8 | RHSA-2012:1088 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 10.0.6-1.el5_8 | RHSA-2012:1089 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 5
- RHSA-2012:1088 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:1089 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- 49977 third-party-advisory
- 49992 third-party-advisory
- 54584 vdb-entry
- 1027256 vdb-entry
- RHSA-2012:1088 vendor-advisory
- USN-1509-2 vendor-advisory
- 1027258 vdb-entry
- 49979 third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=761655
- SUSE-SU-2012:0895 vendor-advisory
- USN-1510-1 vendor-advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-51.html
- 49965 third-party-advisory
- 1027257 vdb-entry
- openSUSE-SU-2012:0917 vendor-advisory
- SUSE-SU-2012:0896 vendor-advisory
- 49994 third-party-advisory
- openSUSE-SU-2012:0899 vendor-advisory
- 49968 third-party-advisory
- USN-1509-1 vendor-advisory
- 84003 vdb-entry
- 49993 third-party-advisory
- 49972 third-party-advisory
- oval:org.mitre.oval:def:16993 vdb-entry signature