Description
The startDocumentLoad function in browser/base/content/browser.js in Mozilla Firefox 3.5.x before 3.5.11 and 3.6.x before 3.6.7, and SeaMonkey before 2.0.6, does not properly implement the Same Origin Policy in certain circumstances related to the about:blank document and a document that is currently loading, which allows (1) remote web servers to conduct spoofing attacks via vectors involving a 204 (aka No Content) status code, and allows (2) remote attackers to conduct spoofing attacks via vectors involving a window.stop call.
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 5 | firefox | 3.6.7-2.el5 | RHSA-2010:0547 |
| RHEL 5 | xulrunner +1 | 1.9.2.7-2.el5 | RHSA-2010:0547 |
| RHEL 4 | firefox | 3.6.7-2.el4 | RHSA-2010:0547 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 3
- RHSA-2010:0547 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 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
- 40283 third-party-advisory
- http://www.mozilla.org/security/announce/2010/mfsa2010-45.html
- oval:org.mitre.oval:def:8248 vdb-entry signature
- https://bugzilla.mozilla.org/show_bug.cgi?id=556957
- http://hg.mozilla.org/mozilla-central/rev/cadddabb1178
- http://lcamtuf.blogspot.com/2010/06/yeah-about-that-address-bar-thing.html