Description
Use-after-free vulnerability in the nsHtml5TreeOperation function in xul.dll in Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 allows remote attackers to execute arbitrary code by adding a second root element to an HTML5 document during parsing.
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | icedove | 31.3.0-1~deb7u1 | DSA-3092-1 |
| Debian 7 | iceweasel | 31.3.0esr-1~deb7u1 | DSA-3090-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 34.0+build2-0ubuntu0.14.04.1 | USN-2424-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:31.3.0+build1-0ubuntu0.14.04.1 | USN-2428-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 31.3.0-3.el7_0 | RHSA-2014:1919 |
| RHEL 6 | firefox | 31.3.0-3.el6_6 | RHSA-2014:1919 |
| RHEL 6 | thunderbird | 31.3.0-1.el6_6 | RHSA-2014:1924 |
| RHEL 5 | firefox | 31.3.0-4.el5_11 | RHSA-2014:1919 |
| RHEL 5 | thunderbird | 31.3.0-1.el5_11 | RHSA-2014:1924 |
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 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 31.3.0-4.0.1.el5_11 | ELSA-2014-1919 |
Advisories 10
- RHSA-2014:1924 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2014:1919 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2428-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2424-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3092-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3090-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 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
- ELSA-2014-1919 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Dec 3, 2014
References
- openSUSE-SU-2015:0138 vendor-advisory
- 71398 vdb-entry
- GLSA-201504-01 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1088635
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- DSA-3090 vendor-advisory
- openSUSE-SU-2015:1266 vendor-advisory
- http://www.mozilla.org/security/announce/2014/mfsa2014-87.html
- DSA-3092 vendor-advisory