Description
The Web Worker functionality in Mozilla Firefox 3.0.x before 3.0.18 and 3.5.x before 3.5.8, and SeaMonkey before 2.0.3, does not properly handle array data types for posted messages, which allows remote attackers to cause a denial of service (heap memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | firefox | 3.0.18-1.el5_4 | RHSA-2010:0112 |
| RHEL 5 | xulrunner +2 | 1.9.0.18-1.el5_4 | RHSA-2010:0112 |
| RHEL 4 | firefox | 3.0.18-1.el4 | RHSA-2010:0112 |
Advisories 1
- RHSA-2010:0112 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- USN-895-1 vendor-advisory
- mozilla-webworkers-code-execution(56360) vdb-entry
- 38847 third-party-advisory
- SUSE-SA:2010:015 vendor-advisory
- MDVSA-2010:042 vendor-advisory
- FEDORA-2010-1936 vendor-advisory
- RHSA-2010:0112 vendor-advisory
- FEDORA-2010-1932 vendor-advisory
- oval:org.mitre.oval:def:8465 vdb-entry signature
- DSA-1999 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=534051
- FEDORA-2010-1727 vendor-advisory
- http://www.mozilla.org/security/announce/2010/mfsa2010-02.html
- USN-896-1 vendor-advisory
- ADV-2010-0405 vdb-entry
- 37242 third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=533000
- oval:org.mitre.oval:def:11166 vdb-entry signature
- https://bugzilla.mozilla.org/show_bug.cgi?id=531222
- http://www.zerodayinitiative.com/advisories/ZDI-10-046
- 20100402 ZDI-10-046: Mozilla Firefox Web Worker Array Remote Code Execution Vulnerability mailing-list