Description
The Style Inspector in Mozilla Firefox before 17.0 and Firefox ESR 10.x before 10.0.11 does not properly restrict the context of HTML markup and Cascading Style Sheets (CSS) token sequences, which allows user-assisted remote attackers to execute arbitrary JavaScript code with chrome privileges via a crafted stylesheet.
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 +2 | 10.0.11-1.el6_3 | RHSA-2012:1482 |
| RHEL 5 | firefox +2 | 10.0.11-1.el5_8 | RHSA-2012:1482 |
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-2012:1482 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
- USN-1638-3 vendor-advisory
- USN-1638-2 vendor-advisory
- firefox-style-inspector-priv-esc(80182) vdb-entry
- openSUSE-SU-2012:1586 vendor-advisory
- openSUSE-SU-2013:0175 vendor-advisory
- 56646 vdb-entry
- http://www.palemoon.org/releasenotes-ng.shtml
- RHSA-2012:1482 vendor-advisory
- 51434 third-party-advisory
- openSUSE-SU-2012:1583 vendor-advisory
- 51439 third-party-advisory
- oval:org.mitre.oval:def:16833 vdb-entry signature
- USN-1638-1 vendor-advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-104.html
- SUSE-SU-2012:1592 vendor-advisory
- 51359 third-party-advisory
- MDVSA-2012:173 vendor-advisory
- 51369 third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=796866