Description
Heap-based buffer overflow in the nsHTMLReflowState::CalculateHypotheticalBox function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code by resizing a window displaying absolutely positioned and relatively positioned elements in nested columns.
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 +2 | 10.0.5-1.el6_2 | RHSA-2012:0710 |
| RHEL 6 | thunderbird | 10.0.5-2.el6_2 | RHSA-2012:0715 |
| RHEL 5 | firefox +2 | 10.0.5-1.el5_8 | RHSA-2012:0710 |
| RHEL 5 | thunderbird | 10.0.5-2.el5_8 | RHSA-2012:0715 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 10.0.5-2.el5_8 | RHSA-2012:0715 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
Advisories 4
- RHSA-2012:0715 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:0710 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
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- MDVSA-2012:088 vendor-advisory
- RHSA-2012:0710 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=750066
- oval:org.mitre.oval:def:16985 vdb-entry signature
- http://www.mozilla.org/security/announce/2012/mfsa2012-40.html
- SUSE-SU-2012:0746 vendor-advisory
- openSUSE-SU-2012:0760 vendor-advisory
- RHSA-2012:0715 vendor-advisory