Description
Mozilla Firefox 1.5, Netscape 8.0.4 and 7.2, and K-Meleon before 0.9.12 allows remote attackers to cause a denial of service (CPU consumption and delayed application startup) via a web site with a large title, which is recorded in history.dat but not processed efficiently during startup. NOTE: despite initial reports, the Mozilla vendor does not believe that this issue can be used to trigger a crash or buffer overflow in Firefox. Also, it has been independently reported that Netscape 8.1 does not have this issue.
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 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 | firefox | 1.0.7-1.4.3 | RHSA-2006:0200 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Exploit-DB 1
- Mozilla Firefox 0.x/1.x - Large History File Buffer Overflow EDB-26762 · dos · Dec 8, 2005 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 4
- RHSA-2006:0200 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
- MDKSA-2006:036 vendor-advisory
- USN-275-1 vendor-advisory
- 19902 third-party-advisory
- 21533 vdb-entry
- MDKSA-2006:037 vendor-advisory
- 17944 third-party-advisory
- HPSBUX02122 vendor-advisory
- 19941 third-party-advisory
- 17946 third-party-advisory
- 20051208 Re: re: Firefox 1.5 buffer overflow (poc) mailing-list
- FEDORA-2006-075 vendor-advisory
- GLSA-200604-12 vendor-advisory
- 21622 third-party-advisory
- 19862 third-party-advisory
- 19230 third-party-advisory
- 18704 third-party-advisory
- http://www.networksecurity.fi/advisories/netscape-history.html
- http://support.avaya.com/elmodocs2/security/ASA-2006-205.htm
- DSA-1051 vendor-advisory
- 18709 third-party-advisory
- USN-271-1 vendor-advisory
- 18705 third-party-advisory
- GLSA-200604-18 vendor-advisory
- 16476 vdb-entry
- ADV-2006-0413 vdb-entry
- http://www.mozilla.org/security/announce/mfsa2006-03.html
- 1015328 vdb-entry
- 19746 third-party-advisory
- 21033 third-party-advisory
- 18700 third-party-advisory
- 102550 vendor-advisory
- 19759 third-party-advisory
- RHSA-2006:0200 vendor-advisory
- 18706 third-party-advisory
- 17934 third-party-advisory
- 15773 vdb-entry
- FEDORA-2006-076 vendor-advisory
- http://www.mozilla.org/security/history-title.html
- RHSA-2006:0199 vendor-advisory
- 19863 third-party-advisory
- FLSA-2006:180036-2 vendor-advisory
- oval:org.mitre.oval:def:11382 vdb-entry signature
- 18708 third-party-advisory
- ADV-2005-2805 vdb-entry
- FLSA:180036-1 vendor-advisory
- oval:org.mitre.oval:def:1619 vdb-entry signature
- 20051208 re: Firefox 1.5 buffer overflow (poc) mailing-list
- 228526 vendor-advisory
- 19852 third-party-advisory
- ADV-2006-3391 vdb-entry
- DSA-1046 vendor-advisory
- DSA-1044 vendor-advisory