Description
The Alarm API in Mozilla Firefox before 33.0 and Firefox ESR 31.x before 31.2 does not properly restrict toJSON calls, which allows remote attackers to bypass the Same Origin Policy via crafted API calls that access sensitive information within the JSON data of an alarm.
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 | iceweasel | 31.2.0esr-2~deb7u1 | DSA-3050-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 33.0+build2-0ubuntu0.14.04.1 | USN-2372-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 31.2.0-3.el7_0 | RHSA-2014:1635 |
| RHEL 7 | xulrunner +1 | 31.2.0-1.el7_0 | RHSA-2014:1635 |
| RHEL 6 | firefox | 31.2.0-3.el6_6 | RHSA-2014:1635 |
| RHEL 5 | firefox | 31.2.0-3.el5_11 | RHSA-2014:1635 |
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 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 31.2.0-3.0.1.el7_0 | ELSA-2014-1635 |
| Oracle Linux 7 | xulrunner +1 | 31.2.0-1.0.1.el7_0 | ELSA-2014-1635 |
Advisories 6
- RHSA-2014:1635 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2372-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3050-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 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-2014-1635 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 15, 2014
References
- openSUSE-SU-2014:1344 vendor-advisory
- FEDORA-2014-13042 vendor-advisory
- 1031028 vdb-entry
- openSUSE-SU-2014:1345 vendor-advisory
- http://www.mozilla.org/security/announce/2014/mfsa2014-82.html
- 70424 vdb-entry
- https://advisories.mageia.org/MGASA-2014-0421.html
- GLSA-201504-01 vendor-advisory
- RHSA-2014:1635 vendor-advisory
- FEDORA-2014-14084 vendor-advisory
- USN-2372-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- 62022 third-party-advisory
- 1031030 vdb-entry
- 62023 third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1015540
- DSA-3050 vendor-advisory
- 61854 third-party-advisory