Description
nsHTMLContentSink.cpp in 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 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unknown vectors involving a "particular sequence of HTML tags" that leads to memory corruption.
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
- http://www.mozilla.org/security/announce/2006/mfsa2006-18.html
- USN-275-1 vendor-advisory
- oval:org.mitre.oval:def:11704 vdb-entry signature
- RHSA-2006:0330 vendor-advisory
- SSRT061145 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
- 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
- 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
- 20060417 ZDI-06-009: Mozilla Firefox Tag Parsing Code Execution Vulnerability mailing-list
- 19759 third-party-advisory
- SUSE-SA:2006:021 vendor-advisory
- FLSA:189137-2 vendor-advisory
- ADV-2006-1356 vdb-entry
- mozilla-nshtmlcontentsink-memory-corruption(25819) vdb-entry
- VU#736934 third-party-advisory
- MDKSA-2006:078 vendor-advisory
- 19729 third-party-advisory
- 729 third-party-advisory
- oval:org.mitre.oval:def:1848 vdb-entry signature
- 20051 third-party-advisory
- 19863 third-party-advisory
- TA06-107A 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
- http://www.zerodayinitiative.com/advisories/ZDI-06-009.html
- MDKSA-2006:076 vendor-advisory
- DSA-1046 vendor-advisory
- DSA-1044 vendor-advisory