Description
The jar: URI implementation in Mozilla Firefox before 3.0.9, Thunderbird, and SeaMonkey does not follow the Content-Disposition header of the inner URI, which allows remote attackers to conduct cross-site scripting (XSS) attacks and possibly other attacks via an uploaded .jar file with a "Content-Disposition: attachment" designation.
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 | 1.9.0.9-0lenny2 | DSA-1797-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | firefox | 3.0.9-1.el5 | RHSA-2009:0436 |
| RHEL 5 | thunderbird | 2.0.0.22-2.el5_3 | RHSA-2009:1126 |
| RHEL 5 | xulrunner +2 | 1.9.0.9-1.el5 | RHSA-2009:0436 |
| RHEL 4 | firefox | 3.0.9-1.el4 | RHSA-2009:0436 |
| RHEL 4 | seamonkey +5 | 1.0.9-41.el4 | RHSA-2009:0437 |
| RHEL 4 | thunderbird | 1.5.0.12-23.el4 | RHSA-2009:1125 |
| RHEL 3 | seamonkey +9 | 1.0.9-0.37.el3 | RHSA-2009:0437 |
| RHEL 2 | seamonkey +9 | 1.0.9-0.33.el2 | RHSA-2009:0437 |
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 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 7
- RHSA-2009:0436 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-2009:0437 Red Hat Security Advisory: seamonkey security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1797-1 xulrunner - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2009:1126 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- MDVSA-2009:111 vendor-advisory
- oval:org.mitre.oval:def:6021 vdb-entry signature
- FEDORA-2009-3875 vendor-advisory
- 34894 third-party-advisory
- oval:org.mitre.oval:def:6710 vdb-entry signature
- ADV-2009-1125 vdb-entry
- oval:org.mitre.oval:def:10150 vdb-entry signature
- 34758 third-party-advisory
- 35536 third-party-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=474536
- RHSA-2009:1125 vendor-advisory
- http://www.mozilla.org/security/announce/2009/mfsa2009-16.html
- 34844 third-party-advisory
- USN-782-1 vendor-advisory
- 35065 third-party-advisory
- 1022095 vdb-entry
- USN-764-1 vendor-advisory
- MDVSA-2009:141 vendor-advisory
- SUSE-SR:2009:010 vendor-advisory
- oval:org.mitre.oval:def:6194 vdb-entry signature
- 35042 third-party-advisory
- 34656 vdb-entry
- 34843 third-party-advisory
- DSA-1797 vendor-advisory
- RHSA-2009:0437 vendor-advisory
- RHSA-2009:0436 vendor-advisory
- RHSA-2009:1126 vendor-advisory
- 34780 third-party-advisory
- 264308 vendor-advisory
- oval:org.mitre.oval:def:6312 vdb-entry signature