Description
The certificate-warning functionality in browser/components/certerror/content/aboutCertError.xhtml in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.10 does not properly handle attempted clickjacking of the about:certerror page, which allows man-in-the-middle attackers to trick users into adding an unintended exception via an IFRAME element.
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 |
Advisories 2
- 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
References
- 49977 third-party-advisory
- 49992 third-party-advisory
- 54581 vdb-entry
- RHSA-2012:1088 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=633691
- USN-1509-2 vendor-advisory
- 49979 third-party-advisory
- SUSE-SU-2012:0895 vendor-advisory
- 49965 third-party-advisory
- SUSE-SU-2012:0896 vendor-advisory
- 49994 third-party-advisory
- openSUSE-SU-2012:0899 vendor-advisory
- USN-1509-1 vendor-advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-54.html
- 49993 third-party-advisory
- 84011 vdb-entry
- 49972 third-party-advisory
- oval:org.mitre.oval:def:16783 vdb-entry signature