Description
The js_watch_set function in js/src/jsdbgapi.cpp in the JavaScript engine in Mozilla Firefox before 3.0.12 allows remote attackers to cause a denial of service (assertion failure and application exit) or possibly execute arbitrary code via a crafted .js file, related to a "memory safety bug." NOTE: this was originally reported as affecting versions before 3.0.13.
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 5.0 | xulrunner | 1.9.0.13-0lenny1 | DSA-1873-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | firefox | 3.0.12-1.el5_3 | RHSA-2009:1162 |
| RHEL 5 | xulrunner +2 | 1.9.0.12-1.el5_3 | RHSA-2009:1162 |
| RHEL 4 | firefox | 3.0.12-1.el4 | RHSA-2009:1162 |
Advisories 2
- RHSA-2009:1162 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1873-1 xulrunner - spoofing vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- ADV-2009-2142 vdb-entry
- http://www.mozilla.org/security/announce/2009/mfsa2009-45.html
- 266148 vendor-advisory
- FEDORA-2009-8288 vendor-advisory
- 36126 third-party-advisory
- FEDORA-2009-8279 vendor-advisory
- 35927 vdb-entry
- oval:org.mitre.oval:def:9806 vdb-entry signature
- https://bugzilla.mozilla.org/show_bug.cgi?id=501270