Description
The XBL.__proto__.toString implementation in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 10.x before 10.0.12 and 17.x before 17.0.2, and SeaMonkey before 2.15 makes it easier for remote attackers to bypass the ASLR protection mechanism by calling the toString function of an XBL object.
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 | 10.0.12-1.el6_3 | RHSA-2013:0144 |
| RHEL 6 | thunderbird | 10.0.12-3.el6_3 | RHSA-2013:0145 |
| RHEL 5 | firefox +2 | 10.0.12-1.el5_9 | RHSA-2013:0144 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 10.0.12-3.el5_9 | RHSA-2013:0145 |
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 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 5
- RHSA-2013:0145 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2013:0144 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 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
- SUSE-SU-2013:0048 vendor-advisory
- openSUSE-SU-2013:0131 vendor-advisory
- http://www.mozilla.org/security/announce/2013/mfsa2013-11.html
- RHSA-2013:0145 vendor-advisory
- USN-1681-4 vendor-advisory
- RHSA-2013:0144 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=806031
- SUSE-SU-2013:0049 vendor-advisory
- USN-1681-1 vendor-advisory
- openSUSE-SU-2013:0149 vendor-advisory
- USN-1681-2 vendor-advisory
- oval:org.mitre.oval:def:17109 vdb-entry signature