Description
Use-after-free vulnerability in the nsHostResolver::ConditionallyRefreshRecord function in libxul.so in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via vectors related to host resolution.
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 | 24.5.0-1~deb7u1 | DSA-2924-1 |
| Debian 7 | iceweasel | 24.5.0esr-1~deb7u1 | DSA-2918-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 29.0+build1-0ubuntu0.14.04.2 | USN-2185-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:24.5.0+build1-0ubuntu0.14.04.1 | USN-2189-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox +1 | 24.5.0-1.el6_5 | RHSA-2014:0449, RHSA-2014:0448 |
| RHEL 5 | firefox +1 | 24.5.0-1.el5_10 | RHSA-2014:0449, RHSA-2014:0448 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 24.5.0-1.el5_10 | RHSA-2014:0449 |
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 9
- RHSA-2014:0448 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2014:0449 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2189-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2185-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-2918-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2924-1 icedove - 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
References
- RHSA-2014:0448 vendor-advisory
- http://www.mozilla.org/security/announce/2014/mfsa2014-46.html
- FEDORA-2014-5833 vendor-advisory
- openSUSE-SU-2014:0602 vendor-advisory
- openSUSE-SU-2014:0599 vendor-advisory
- openSUSE-SU-2014:0629 vendor-advisory
- SUSE-SU-2014:0727 vendor-advisory
- GLSA-201504-01 vendor-advisory
- 1030165 vdb-entry
- 59866 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- openSUSE-SU-2014:0640 vendor-advisory
- USN-2189-1 vendor-advisory
- RHSA-2014:0449 vendor-advisory
- SUSE-SU-2014:0665 vendor-advisory
- DSA-2918 vendor-advisory
- DSA-2924 vendor-advisory
- USN-2185-1 vendor-advisory
- 67130 vdb-entry
- 1030164 vdb-entry
- 1030163 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=966006
- FEDORA-2014-5829 vendor-advisory