CVE-2004-0765
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before...
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.
Exploit likelihood
What each source reports
NVD Score used
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.
- Record
CVE-2004-0765- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Updated
- 2026-11-02
CVE List No score
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.
- Record
CVE-2004-0765- Updated
- 2026-11-02
EUVDEUVD-2004-0763 No score
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.
- Record
EUVD-2004-0763- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-h29q-7v28-gprh No score
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before...
The cert_TestHostName function in Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, only checks the hostname portion of a certificate when the hostname portion of the URI is not a fully qualified domain name (FQDN), which allows remote attackers to spoof trusted certificates.
- Record
GHSA-h29q-7v28-gprh- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2004-0765 is a high vulnerability (CVSS 7.5) in Mozilla Firefox, published August 3, 2004. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.03%, the 63rd percentile. No source names a fixed version.
References
bugzilla.mozilla.org/show_bug.cgi?id=234058
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11162
novell.com/linux/security/advisories/2004_36_mozilla.html
redhat.com/support/errata/RHSA-2004-421.html
exchange.xforce.ibmcloud.com/vulnerabilities/16868
mozilla.org/projects/security/known-vulnerabilities.html
marc.info?l=bugtraq&m=109900315219363&w=2
nvd.nist.gov/vuln/detail/CVE-2004-0765
github.com/advisories/GHSA-h29q-7v28-gprh