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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 0.9 (including) |
| Mozilla | Mozilla | * | 1.7 (including) |
| Thunderbird | Mozilla | * | 0.7 (including) |
| Red Hat Enterprise Linux 2.1 | RedHat | galeon | * |
| Red Hat Enterprise Linux 3 | RedHat | mozilla | * |