Description
Buffer overflow in the JavaScript engine in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, and SeaMonkey before 2.0.12, might allow remote attackers to execute arbitrary code via vectors involving non-local JavaScript variables, aka an "upvarMap" issue.
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 6.0 | iceape | 2.0.11-3 | DSA-2180-1 |
| Debian 6.0 | icedove | 3.0.11-1+squeeze1 | DSA-2187-1 |
| Debian 6.0 | iceweasel | 3.5.16-5 | DSA-2186-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox | 3.6.14-4.el6_0 | RHSA-2011:0310 |
| RHEL 6 | xulrunner +1 | 1.9.2.14-3.el6_0 | RHSA-2011:0310 |
| RHEL 5 | firefox | 3.6.14-4.el5_6 | RHSA-2011:0310 |
| RHEL 5 | xulrunner +1 | 1.9.2.14-4.el5_6 | RHSA-2011:0310 |
| RHEL 4 | firefox | 3.6.14-4.el4 | RHSA-2011:0310 |
Advisories 4
- RHSA-2011:0310 Red Hat Security Advisory: firefox security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- DSA-2180-1 iceape - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2186-1 iceweasel - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2187-1 icedove - several Debian Security (DSA / DLA) · Mar 9, 2026