Description
Mozilla Thunderbird before 2.0.0.22 and SeaMonkey before 1.1.17 allow remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a multipart/alternative e-mail message containing a text/enhanced part that triggers access to an incorrect object type.
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 | icedove | 2.0.0.22-0lenny1 | DSA-1830-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | thunderbird | 2.0.0.22-2.el5_3 | RHSA-2009:1126 |
| RHEL 4 | seamonkey +5 | 1.0.9-44.el4_8 | RHSA-2009:1134 |
| RHEL 4 | thunderbird | 1.5.0.12-23.el4 | RHSA-2009:1125 |
| RHEL 3 | seamonkey +9 | 1.0.9-0.39.el3 | RHSA-2009:1134 |
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 4
- RHSA-2009:1134 Red Hat Security Advisory: seamonkey 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
- DSA-1830-1 icedove - 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
- RHSA-2009:1134 vendor-advisory
- SSA:2009-178-01 vendor-advisory
- DSA-1830 vendor-advisory
- 35602 third-party-advisory
- oval:org.mitre.oval:def:9994 vdb-entry signature
- FEDORA-2009-7614 vendor-advisory
- http://www.mozilla.org/security/announce/2009/mfsa2009-33.html
- FEDORA-2009-7567 vendor-advisory
- 35882 third-party-advisory
- mozilla-multipart-alternative-code-exec(51315) vdb-entry
- MDVSA-2009:141 vendor-advisory
- 35561 third-party-advisory
- SSA:2009-176-01 vendor-advisory
- 35461 vdb-entry
- 35633 third-party-advisory
- 1022433 vdb-entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=495057