Description
The asm.js implementation in Mozilla Firefox before 36.0.3, Firefox ESR 31.x before 31.5.2, and SeaMonkey before 2.33.1 does not properly determine the cases in which bounds checking may be safely skipped during JIT compilation and heap access, which allows remote attackers to read or write to unintended memory locations, and consequently execute arbitrary code, via crafted JavaScript.
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 | 31.5.3esr-1~deb7u1 | DSA-3201-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 36.0.4+build1-0ubuntu0.14.04.1 | USN-2538-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 31.5.3-3.el7_1 | RHSA-2015:0718 |
| RHEL 6 | firefox | 31.5.3-1.el6_6 | RHSA-2015:0718 |
| RHEL 5 | firefox | 31.5.3-1.el5_11 | RHSA-2015:0718 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | MozillaFirefox | 31.5.3esr-27.1 | SUSE-SU-2015:0630-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | MozillaFirefox | 31.5.3esr-27.1 | SUSE-SU-2015:0630-1 |
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 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 31.5.3-3.0.1.el7_1 | ELSA-2015-0718 |
Advisories 7
- RHSA-2015:0718 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2538-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3201-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:0630-1 Security update for MozillaFirefox 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-2015-0718 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 24, 2015
References
- 1031958 vdb-entry
- http://www.mozilla.org/security/announce/2015/mfsa2015-29.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1145255
- openSUSE-SU-2015:0636 vendor-advisory
- 73263 vdb-entry
- openSUSE-SU-2015:0567 vendor-advisory
- GLSA-201504-01 vendor-advisory
- RHSA-2015:0718 vendor-advisory
- DSA-3201 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- SUSE-SU-2015:0630 vendor-advisory
- SUSE-SU-2015:0593 vendor-advisory
- USN-2538-1 vendor-advisory