Description
Use-after-free vulnerability in Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMonkey before 2.7 might allow remote attackers to execute arbitrary code via vectors related to incorrect AttributeChildRemoved notifications that affect access to removed nsDOMAttribute child nodes.
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 | 3.6.26-1.el6_2 | RHSA-2012:0079 |
| RHEL 6 | thunderbird | 3.1.18-1.el6_2 | RHSA-2012:0080 |
| RHEL 6 | xulrunner +1 | 1.9.2.26-1.el6_2 | RHSA-2012:0079 |
| RHEL 5 | firefox | 3.6.26-1.el5_7 | RHSA-2012:0079 |
| RHEL 5 | xulrunner +1 | 1.9.2.26-1.el5_7 | RHSA-2012:0079 |
| RHEL 4 | firefox | 3.6.26-2.el4 | RHSA-2012:0079 |
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 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Metasploit 1 module
-
Firefox 8/9 AttributeChildRemoved() Use-After-Free
exploit/windows/browser/mozilla_attribchildremoved
Exploit-DB 1
- Mozilla Firefox 8/9 - 'AttributeChildRemoved()' Use-After-Free (Metasploit) EDB-18870 · remote · May 13, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 5
- RHSA-2012:0079 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:0080 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
- https://bugzilla.mozilla.org/show_bug.cgi?id=708198
- http://www.mozilla.org/security/announce/2012/mfsa2012-04.html
- SUSE-SU-2012:0198 vendor-advisory
- MDVSA-2012:013 vendor-advisory
- SUSE-SU-2012:0221 vendor-advisory
- oval:org.mitre.oval:def:14697 vdb-entry signature
- openSUSE-SU-2012:0234 vendor-advisory