Description
Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, Thunderbird before 3.0.11 and 3.1.x before 3.1.7, and SeaMonkey before 2.0.11 do not properly validate downloadable fonts before use within an operating system's font implementation, which allows remote attackers to execute arbitrary code via vectors related to @font-face Cascading Style Sheets (CSS) rules.
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.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox | 3.6.13-2.el6_0 | RHSA-2010:0966 |
| RHEL 6 | thunderbird | 3.1.7-3.el6_0 | RHSA-2010:0969 |
| RHEL 6 | xulrunner +1 | 1.9.2.13-3.el6_0 | RHSA-2010:0966 |
| RHEL 5 | firefox | 3.6.13-2.el5 | RHSA-2010:0966 |
| RHEL 5 | xulrunner +1 | 1.9.2.13-3.el5 | RHSA-2010:0966 |
| RHEL 4 | firefox | 3.6.13-3.el4 | RHSA-2010:0966 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
Advisories 3
- RHSA-2010:0969 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2010:0966 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- SUSE-SA:2011:003 vendor-advisory
- FEDORA-2010-18775 vendor-advisory
- oval:org.mitre.oval:def:12533 vdb-entry signature
- MDVSA-2010:258 vendor-advisory
- MDVSA-2010:251 vendor-advisory
- http://support.avaya.com/css/P8/documents/100124650
- RHSA-2010:0966 vendor-advisory
- 45352 vdb-entry
- USN-1019-1 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=660420
- RHSA-2010:0969 vendor-advisory
- 42818 third-party-advisory
- 1024846 vdb-entry
- http://www.mozilla.org/security/announce/2010/mfsa2010-78.html
- FEDORA-2010-18778 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=527276
- 1024848 vdb-entry
- FEDORA-2010-18920 vendor-advisory
- FEDORA-2010-18777 vendor-advisory
- ADV-2011-0030 vdb-entry
- FEDORA-2010-18890 vendor-advisory
- 42716 third-party-advisory
- USN-1020-1 vendor-advisory
- FEDORA-2010-18773 vendor-advisory