Description
Mozilla Firefox 3.0.x before 3.0.18 and 3.5.x before 3.5.8, and SeaMonkey before 2.0.3, does not properly support the application/octet-stream content type as a protection mechanism against execution of web script in certain circumstances involving SVG and the EMBED element, which allows remote attackers to bypass the Same Origin Policy and conduct cross-site scripting (XSS) attacks via an embedded SVG document.
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 | 1.9.0.18-1 | DSA-1999-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | firefox | 3.0.18-1.el5_4 | RHSA-2010:0112 |
| RHEL 5 | xulrunner +2 | 1.9.0.18-1.el5_4 | RHSA-2010:0112 |
| RHEL 4 | firefox | 3.0.18-1.el4 | RHSA-2010:0112 |
Advisories 2
- RHSA-2010:0112 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1999-1 xulrunner - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-895-1 vendor-advisory
- 38847 third-party-advisory
- SUSE-SA:2010:015 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=455472
- MDVSA-2010:042 vendor-advisory
- FEDORA-2010-1936 vendor-advisory
- RHSA-2010:0112 vendor-advisory
- FEDORA-2010-1932 vendor-advisory
- DSA-1999 vendor-advisory
- FEDORA-2010-1727 vendor-advisory
- oval:org.mitre.oval:def:10697 vdb-entry signature
- USN-896-1 vendor-advisory
- ADV-2010-0405 vdb-entry
- 37242 third-party-advisory
- oval:org.mitre.oval:def:8631 vdb-entry signature
- http://www.mozilla.org/security/announce/2010/mfsa2010-05.html
- mozilla-svg-xss(56363) vdb-entry