Description
Mozilla Firefox and Thunderbird 1.x before 1.5 and 1.0.x before 1.0.8, Mozilla Suite before 1.7.13, and SeaMonkey before 1.0 returns the Object class prototype instead of the global window object when (1) .valueOf.call or (2) .valueOf.apply are called without any arguments, which allows remote attackers to conduct cross-site scripting (XSS) attacks.
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 14 | thunderbird | 1.5.0.2-1 | — |
| Debian 13 | thunderbird | 1.5.0.2-1 | — |
| Debian 12 | thunderbird | 1.5.0.2-1 | — |
| Debian 3.1 | mozilla | 2:1.7.8-1sarge5 | DSA-1046-1 |
| Debian 3.1 | mozilla-firefox | 1.0.4-2sarge6 | DSA-1044-1 |
| Debian 3.1 | mozilla-thunderbird | 1.0.2-2.sarge1.0.8 | DSA-1051-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | devhelp +1 | 0.9.2-2.4.8 | RHSA-2006:0329 |
| RHEL 4 | firefox +1 | 1.0.8-1.4.1 | RHSA-2006:0330, RHSA-2006:0328 |
Advisories 6
- RHSA-2006:0329 Red Hat Security Advisory: mozilla security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2006:0330 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2006:0328 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1044-1 mozilla-firefox - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1046-1 mozilla - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1051-1 mozilla-thunderbird - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
References
- USN-275-1 vendor-advisory
- RHSA-2006:0330 vendor-advisory
- 19902 third-party-advisory
- USN-276-1 vendor-advisory
- HPSBUX02122 vendor-advisory
- 19941 third-party-advisory
- 19780 third-party-advisory
- RHSA-2006:0328 vendor-advisory
- 19821 third-party-advisory
- GLSA-200604-12 vendor-advisory
- http://www.mozilla.org/security/announce/2006/mfsa2006-19.html
- 21622 third-party-advisory
- 19862 third-party-advisory
- MDKSA-2006:075 vendor-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2006-205.htm
- 19823 third-party-advisory
- DSA-1051 vendor-advisory
- FEDORA-2006-410 vendor-advisory
- USN-271-1 vendor-advisory
- oval:org.mitre.oval:def:1955 vdb-entry signature
- 19714 third-party-advisory
- RHSA-2006:0329 vendor-advisory
- GLSA-200604-18 vendor-advisory
- 19811 third-party-advisory
- 19794 third-party-advisory
- 19746 third-party-advisory
- 21033 third-party-advisory
- 102550 vendor-advisory
- 19696 third-party-advisory
- 19759 third-party-advisory
- SUSE-SA:2006:021 vendor-advisory
- FLSA:189137-2 vendor-advisory
- ADV-2006-1356 vdb-entry
- oval:org.mitre.oval:def:9604 vdb-entry signature
- mozilla-valueof-xss(25820) vdb-entry
- MDKSA-2006:078 vendor-advisory
- 19729 third-party-advisory
- 20051 third-party-advisory
- 19863 third-party-advisory
- FLSA:189137-1 vendor-advisory
- 17516 vdb-entry
- 228526 vendor-advisory
- FEDORA-2006-411 vendor-advisory
- 19852 third-party-advisory
- 19721 third-party-advisory
- SUSE-SA:2006:022 vendor-advisory
- GLSA-200605-09 vendor-advisory
- ADV-2006-3391 vdb-entry
- 19631 third-party-advisory
- 19950 third-party-advisory
- MDKSA-2006:076 vendor-advisory
- DSA-1046 vendor-advisory
- DSA-1044 vendor-advisory