Description
The JavaScript engine in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via vectors related to (1) js_LeaveSharpObject, (2) ParseXMLSource, and (3) a certain assertion in jsinterp.c; and other 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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 5.0 | xulrunner | 1.9.0.11-0lenny1 | DSA-1820-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | firefox | 3.0.11-2.el5_3 | RHSA-2009:1095 |
| RHEL 5 | thunderbird | 2.0.0.22-2.el5_3 | RHSA-2009:1126 |
| RHEL 5 | xulrunner +2 | 1.9.0.11-3.el5_3 | RHSA-2009:1095 |
| RHEL 4 | firefox | 3.0.11-4.el4 | RHSA-2009:1095 |
| RHEL 4 | seamonkey +5 | 1.0.9-43.el4_8 | RHSA-2009:1096 |
| RHEL 4 | thunderbird | 1.5.0.12-23.el4 | RHSA-2009:1125 |
| RHEL 3 | seamonkey +9 | 1.0.9-0.38.el3 | RHSA-2009:1096 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 2.0.0.22-2.el5_3 | RHSA-2009:1126 |
Advisories 5
- RHSA-2009:1095 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2009:1125 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2009:1096 Red Hat Security Advisory: seamonkey security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1820-1 xulrunner - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2009:1126 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=427196
- 265068 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=503570
- ADV-2009-1572 vdb-entry
- RHSA-2009:1096 vendor-advisory
- 1020800 vendor-advisory
- SSA:2009-178-01 vendor-advisory
- 35536 third-party-advisory
- 35602 third-party-advisory
- RHSA-2009:1125 vendor-advisory
- 35326 vdb-entry
- 35372 vdb-entry
- 55152 vdb-entry
- 35440 third-party-advisory
- FEDORA-2009-6411 vendor-advisory
- USN-782-1 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=426520
- 35428 third-party-advisory
- 35431 third-party-advisory
- 35331 third-party-advisory
- 35468 third-party-advisory
- ADV-2009-2152 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=487204
- 35439 third-party-advisory
- 55153 vdb-entry
- FEDORA-2009-6366 vendor-advisory
- MDVSA-2009:141 vendor-advisory
- 35415 third-party-advisory
- RHSA-2009:1095 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=369696
- oval:org.mitre.oval:def:11487 vdb-entry signature
- 1022376 vdb-entry
- 55154 vdb-entry
- SSA:2009-167-01 vendor-advisory
- 35561 third-party-advisory
- http://www.mozilla.org/security/announce/2009/mfsa2009-24.html
- SSA:2009-176-01 vendor-advisory
- DSA-1820 vendor-advisory
- RHSA-2009:1126 vendor-advisory
- 1022397 vdb-entry