Description
Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 does not properly parse URLs with leading whitespace or control characters, which might allow remote attackers to misrepresent URLs and simplify phishing 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 4.0 | iceape | 1.0.13~pre080614i-0etch1 | DSA-1697-1 |
| Debian 4.0 | icedove | 1.5.0.13+1.5.0.15b.dfsg1+prepatch080614i-0etch1 | DSA-1696-1 |
| Debian 4.0 | iceweasel | 2.0.0.19-0etch1 | DSA-1707-1 |
| Debian 4.0 | xulrunner | 1.8.0.15~pre080614i-0etch1 | DSA-1704-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | firefox | 3.0.5-1.el5_2 | RHSA-2008:1036 |
| RHEL 5 | nspr +1 | 4.7.3-2.el5 | RHSA-2008:1036 |
| RHEL 5 | nss +3 | 3.12.2.0-2.el5 | RHSA-2008:1036 |
| RHEL 5 | thunderbird | 2.0.0.19-1.el5_2 | RHSA-2009:0002 |
| RHEL 5 | xulrunner +2 | 1.9.0.5-1.el5_2 | RHSA-2008:1036 |
| RHEL 4 | firefox | 3.0.5-1.el4 | RHSA-2008:1036 |
| RHEL 4 | nspr +1 | 4.7.3-1.el4 | RHSA-2008:1036 |
| RHEL 4 | nss +1 | 3.12.2.0-1.el4 | RHSA-2008:1036 |
| RHEL 4 | seamonkey +5 | 1.0.9-32.el4 | RHSA-2008:1037 |
| RHEL 4 | thunderbird | 1.5.0.12-18.el4 | RHSA-2009:0002 |
| RHEL 3 | seamonkey +9 | 1.0.9-0.29.el3 | RHSA-2008:1037 |
| RHEL 2 | seamonkey +9 | 1.0.9-0.25.el2 | RHSA-2008:1037 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 2.0.0.19-1.el5_2 | RHSA-2009:0002 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
Advisories 8
- RHSA-2008:1036 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2009:0002 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2008:1037 Red Hat Security Advisory: seamonkey security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1704-1 xulrunner - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1697-1 iceape - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1707-1 iceweasel - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1696-1 icedove - several vulnerabilities Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- 32882 vdb-entry
- 33408 third-party-advisory
- DSA-1697 vendor-advisory
- mozilla-urlparsing-weak-security(47414) vdb-entry
- oval:org.mitre.oval:def:11040 vdb-entry signature
- 1021426 vdb-entry
- 33205 third-party-advisory
- 33421 third-party-advisory
- RHSA-2008:1036 vendor-advisory
- ADV-2009-0977 vdb-entry
- USN-690-2 vendor-advisory
- http://www.mozilla.org/security/announce/2008/mfsa2008-66.html
- USN-701-1 vendor-advisory
- 33231 third-party-advisory
- MDVSA-2008:245 vendor-advisory
- USN-690-1 vendor-advisory
- MDVSA-2009:012 vendor-advisory
- 33203 third-party-advisory
- 33433 third-party-advisory
- DSA-1707 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=425046
- 33216 third-party-advisory
- 256408 vendor-advisory
- RHSA-2008:1037 vendor-advisory
- DSA-1704 vendor-advisory
- DSA-1696 vendor-advisory
- 33204 third-party-advisory
- USN-701-2 vendor-advisory
- 33184 third-party-advisory
- RHSA-2009:0002 vendor-advisory
- 258748 vendor-advisory
- MDVSA-2008:244 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=460803
- 33415 third-party-advisory
- 33188 third-party-advisory
- 33523 third-party-advisory
- 35080 third-party-advisory
- 33547 third-party-advisory
- 33434 third-party-advisory
- 33189 third-party-advisory
- 34501 third-party-advisory