CVE-2004-0765 — HIGH severity vulnerability (The cert_TestHostName function in Mozilla before 1.7, Firefo)
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.
| CVE ID | CVE-2004-0765 |
|---|---|
| Severity | HIGH |
| CVSS score | 7.5 |
| CVSS vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| CWE | NVD-CWE-Other |
| Status | Modified |
| Published | 2004-08-18 |
| Last modified | 2026-04-16 |
| Description | 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. |
| Source | NIST National Vulnerability Database |
🔍 Search all vulnerabilities →
$999/mo
Try CVECheck →