Description
Mozilla Firefox before 3.6 Beta 3 does not properly handle overlong UTF-8 encoding, which makes it easier for remote attackers to bypass cross-site scripting (XSS) protection mechanisms via a crafted string, a different vulnerability than CVE-2010-1210.
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 5 | devhelp +1 | 0.12-21.el5 | RHSA-2010:0501 |
| RHEL 5 | esc | 1.1.0-12.el5 | RHSA-2010:0501 |
| RHEL 5 | firefox | 3.6.4-8.el5 | RHSA-2010:0501 |
| RHEL 5 | gnome-python2-extras +4 | 2.14.2-7.el5 | RHSA-2010:0501 |
| RHEL 5 | totem +2 | 2.16.7-7.el5 | RHSA-2010:0501 |
| RHEL 5 | xulrunner +1 | 1.9.2.4-10.el5 | RHSA-2010:0501 |
| RHEL 5 | yelp | 2.16.0-26.el5 | RHSA-2010:0501 |
| RHEL 4 | firefox | 3.6.4-8.el4 | RHSA-2010:0500 |
Advisories 2
- RHSA-2010:0501 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2010:0500 Red Hat Security Advisory: firefox security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 28, 2026