Description
The IsCSSWordSpacingSpace function in Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey before 2.13 allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds read) via unspecified vectors.
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 | 10.0.8-1.el6_3 | RHSA-2012:1351, RHSA-2012:1350 |
| RHEL 5 | firefox +3 | 10.0.8-1.el5_8 | RHSA-2012:1351, RHSA-2012:1350 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 10.0.8-1.el5_8 | RHSA-2012:1351 |
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-2012:1351 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2012:1350 Red Hat Security Advisory: firefox security and bug fix 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-2024:14572-1 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
- 50904 third-party-advisory
- 50984 third-party-advisory
- 50935 third-party-advisory
- 50856 third-party-advisory
- 50892 third-party-advisory
- RHSA-2012:1351 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=765621
- 50936 third-party-advisory
- oval:org.mitre.oval:def:16808 vdb-entry signature
- 55318 third-party-advisory
- 56136 vdb-entry
- SUSE-SU-2012:1351 vendor-advisory
- firefox-iscsswordspacingspace-code-exec(79156) vdb-entry
- MDVSA-2012:163 vendor-advisory
- USN-1611-1 vendor-advisory
- http://www.mozilla.org/security/announce/2012/mfsa2012-85.html