Description
Mozilla Firefox before 3.0.12 and 3.5 before 3.5.1 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via vectors involving a Flash object, a slow script dialog, and the unloading of the Flash plugin, which triggers attempted use of a deleted object.
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 | 1.9.0.12-0lenny1 | DSA-1840-1 |
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-1840-1 xulrunner - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- FEDORA-2009-7961 vendor-advisory
- 36145 third-party-advisory
- 35944 third-party-advisory
- 266148 vendor-advisory
- oval:org.mitre.oval:def:10473 vdb-entry signature
- SUSE-SA:2009:039 vendor-advisory
- RHSA-2009:1162 vendor-advisory
- 35758 vdb-entry
- http://www.mozilla.org/security/announce/2009/mfsa2009-35.html
- 36005 third-party-advisory
- SUSE-SA:2009:042 vendor-advisory
- 35914 third-party-advisory
- ADV-2009-1972 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=493601