Description
Mozilla Firefox 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 do not properly restrict write access to the window.fullScreen object, which allows remote attackers to spoof the user interface via a crafted web page.
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 | 10.0.3-1.el6_2 | RHSA-2012:0388, RHSA-2012:0387 |
| RHEL 5 | firefox +3 | 10.0.3-1.el5_8 | RHSA-2012:0388, RHSA-2012:0387 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 10.0.3-1.el5_8 | RHSA-2012:0388 |
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-2012:0388 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:0387 Red Hat Security Advisory: firefox security and bug fix 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
- openSUSE-SU-2012:0417 vendor-advisory
- 48402 third-party-advisory
- SUSE-SU-2012:0424 vendor-advisory
- USN-1400-5 vendor-advisory
- 48359 third-party-advisory
- USN-1400-4 vendor-advisory
- 48629 third-party-advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-18.html
- USN-1400-3 vendor-advisory
- RHSA-2012:0387 vendor-advisory
- 48496 third-party-advisory
- oval:org.mitre.oval:def:15114 vdb-entry signature
- 49055 third-party-advisory
- USN-1400-2 vendor-advisory
- MDVSA-2012:032 vendor-advisory
- 1026803 vdb-entry
- 48553 third-party-advisory
- USN-1400-1 vendor-advisory
- 48561 third-party-advisory
- RHSA-2012:0388 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=727303
- 1026801 vdb-entry
- 1026804 vdb-entry
- 48513 third-party-advisory