Description
Mozilla Firefox before 43.0 does not properly store the properties of unboxed objects, which allows remote attackers to execute arbitrary code via crafted JavaScript variable assignments.
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 43.0+build1-0ubuntu0.14.04.1 | USN-2833-1 |
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
- USN-2833-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 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=1216130
- GLSA-201512-10 vendor-advisory
- openSUSE-SU-2015:2353 vendor-advisory
- openSUSE-SU-2016:0308 vendor-advisory
- FEDORA-2015-7ab3d3afcf vendor-advisory
- USN-2833-1 vendor-advisory
- 79280 vdb-entry
- http://www.mozilla.org/security/announce/2015/mfsa2015-135.html
- openSUSE-SU-2016:0307 vendor-advisory
- FEDORA-2015-51b1105902 vendor-advisory
- 1034426 vdb-entry