The Public Key Pinning (PKP) implementation in Mozilla Firefox before 33.0 skips pinning checks upon an unspecified issuer-verification error, which makes it easier for remote attackers to bypass an intended pinning configuration and spoof a web site via a crafted certificate that leads to presentation of the Untrusted Connection dialog to the user.
| Software | From | Fixed in |
|---|---|---|
| mozilla / firefox | - | 32.0.x |
| mozilla / firefox | 31.0 | 31.0.x |
| mozilla / firefox | 30.0 | 30.0.x |
| mozilla / firefox | 31.1.0 | 31.1.0.x |