Description
The navigator.sendBeacon implementation in Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 omits the CORS Origin header, which allows remote attackers to bypass intended CORS access-control checks and conduct cross-site request forgery (CSRF) attacks via a crafted web site.
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 | 31.4.0-1~deb7u1 | DSA-3132-1 |
| Debian 7 | iceweasel | 31.4.0esr-1~deb7u1 | DSA-3127-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 35.0+build3-0ubuntu0.14.04.2 | USN-2458-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:31.4.0+build1-0ubuntu0.14.04.1 | USN-2460-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox +2 | 31.4.0-1.el7_0 | RHSA-2015:0046 |
| RHEL 6 | firefox +1 | 31.4.0-1.el6_6 | RHSA-2015:0047, RHSA-2015:0046 |
| RHEL 5 | firefox +1 | 31.4.0-1.el5_11 | RHSA-2015:0047, RHSA-2015:0046 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 31.4.0-1.el5_11 | RHSA-2015:0047 |
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 +2 | 31.4.0-1.0.1.el7_0 | ELSA-2015-0046 |
Advisories 10
- RHSA-2015:0046 Red Hat Security Advisory: firefox security and bug fix update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2015:0047 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- USN-2460-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2458-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3127-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3132-1 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
- ELSA-2015-0046 Critical: firefox security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 14, 2015
References
- RHSA-2015:0046 vendor-advisory
- 62242 third-party-advisory
- 1031533 vdb-entry
- USN-2460-1 vendor-advisory
- 72047 vdb-entry
- openSUSE-SU-2015:0192 vendor-advisory
- 62304 third-party-advisory
- http://linux.oracle.com/errata/ELSA-2015-0047.html
- 62259 third-party-advisory
- 62250 third-party-advisory
- SUSE-SU-2015:0173 vendor-advisory
- 62237 third-party-advisory
- openSUSE-SU-2015:0077 vendor-advisory
- 62418 third-party-advisory
- SUSE-SU-2015:0171 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1080987
- 62316 third-party-advisory
- DSA-3132 vendor-advisory
- 62274 third-party-advisory
- GLSA-201504-01 vendor-advisory
- 62313 third-party-advisory
- RHSA-2015:0047 vendor-advisory
- http://www.mozilla.org/security/announce/2014/mfsa2015-03.html
- 62790 third-party-advisory
- 62293 third-party-advisory
- 62283 third-party-advisory
- firefox-cve20148638-csrf(99958) vdb-entry
- 62446 third-party-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- 62657 third-party-advisory
- 62273 third-party-advisory
- openSUSE-SU-2015:0133 vendor-advisory
- openSUSE-SU-2015:1266 vendor-advisory
- DSA-3127 vendor-advisory
- SUSE-SU-2015:0180 vendor-advisory
- 62315 third-party-advisory
- http://linux.oracle.com/errata/ELSA-2015-0046.html
- 62253 third-party-advisory
- 1031534 vdb-entry