Description
Mozilla Firefox 1.5.0.9 and 2.0.0.1, and SeaMonkey before 1.0.8 allow remote attackers to execute arbitrary code via JavaScript onUnload handlers that modify the structure of a document, wich triggers memory corruption due to the lack of a finalize hook on DOM window objects.
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 4 | devhelp +1 | 0.10-0.7.el4 | RHSA-2007:0077 |
| RHEL 4 | firefox +1 | 1.5.0.10-0.1.el4 | RHSA-2007:0079, RHSA-2007:0078 |
| RHEL 4 | seamonkey +5 | 1.0.8-0.2.el4 | RHSA-2007:0077 |
| RHEL 3 | seamonkey +9 | 1.0.8-0.2.el3 | RHSA-2007:0077 |
| RHEL 2 | seamonkey +9 | 1.0.8-0.2.el2 | RHSA-2007:0077 |
Advisories 3
- RHSA-2007:0078 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0079 Red Hat Security Advisory: Firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2007:0077 Red Hat Security Advisory: seamonkey security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
References
- RHSA-2007:0078 vendor-advisory
- 1017701 vdb-entry
- 24395 third-party-advisory
- 24384 third-party-advisory
- 24457 third-party-advisory
- 24343 third-party-advisory
- HPSBUX02153 vendor-advisory
- 22679 vdb-entry
- ie-mozilla-onunload-dos(32647) vdb-entry
- 20070222 Firefox onUnload + document.write() memory corruption vulnerability (MSIE7 null ptr) mailing-list
- VU#393921 third-party-advisory
- 24650 third-party-advisory
- USN-428-1 vendor-advisory
- 2302 third-party-advisory
- https://issues.rpath.com/browse/RPL-1103
- SUSE-SA:2007:019 vendor-advisory
- SUSE-SA:2007:022 vendor-advisory
- mozilla-onunload-code-execution(32648) vdb-entry
- 32103 vdb-entry
- 20070223 Firefox onUnload + document.write() memory corruption vulnerability (MSIE7 null ptr) mailing-list
- oval:org.mitre.oval:def:11158 vdb-entry signature
- http://www.mozilla.org/security/announce/2007/mfsa2007-08.html
- 24333 third-party-advisory
- MDKSA-2007:050 vendor-advisory
- SSA:2007-066-05 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=371321