| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | ≤ 0.9 | |
| mozilla | ≤ 1.7 | |
| thunderbird | ≤ 0.7 |
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.
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