cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Curl | Haxx | 7.18.0 (including) | 7.18.0 (including) |
| Curl | Haxx | 7.18.1 (including) | 7.18.1 (including) |
| Curl | Haxx | 7.18.2 (including) | 7.18.2 (including) |
| Curl | Haxx | 7.19.0 (including) | 7.19.0 (including) |
| Curl | Haxx | 7.19.1 (including) | 7.19.1 (including) |
| Curl | Haxx | 7.19.2 (including) | 7.19.2 (including) |
| Curl | Haxx | 7.19.3 (including) | 7.19.3 (including) |
| Curl | Haxx | 7.19.4 (including) | 7.19.4 (including) |
| Curl | Haxx | 7.19.5 (including) | 7.19.5 (including) |
| Curl | Haxx | 7.19.6 (including) | 7.19.6 (including) |
| Curl | Haxx | 7.19.7 (including) | 7.19.7 (including) |
| Curl | Haxx | 7.20.0 (including) | 7.20.0 (including) |
| Curl | Haxx | 7.20.1 (including) | 7.20.1 (including) |
| Curl | Haxx | 7.21.0 (including) | 7.21.0 (including) |
| Curl | Haxx | 7.21.1 (including) | 7.21.1 (including) |
| Curl | Haxx | 7.21.2 (including) | 7.21.2 (including) |
| Curl | Haxx | 7.21.3 (including) | 7.21.3 (including) |
| Curl | Haxx | 7.21.4 (including) | 7.21.4 (including) |
| Curl | Haxx | 7.21.5 (including) | 7.21.5 (including) |
| Curl | Haxx | 7.21.6 (including) | 7.21.6 (including) |
| Curl | Haxx | 7.21.7 (including) | 7.21.7 (including) |
| Curl | Haxx | 7.22.0 (including) | 7.22.0 (including) |
| Curl | Haxx | 7.23.0 (including) | 7.23.0 (including) |
| Curl | Haxx | 7.23.1 (including) | 7.23.1 (including) |
| Curl | Haxx | 7.24.0 (including) | 7.24.0 (including) |
| Curl | Haxx | 7.25.0 (including) | 7.25.0 (including) |
| Curl | Haxx | 7.26.0 (including) | 7.26.0 (including) |
| Curl | Haxx | 7.27.0 (including) | 7.27.0 (including) |
| Curl | Haxx | 7.28.0 (including) | 7.28.0 (including) |
| Curl | Haxx | 7.28.1 (including) | 7.28.1 (including) |
| Curl | Haxx | 7.29.0 (including) | 7.29.0 (including) |
| Curl | Haxx | 7.30.0 (including) | 7.30.0 (including) |
| Curl | Haxx | 7.31.0 (including) | 7.31.0 (including) |
| Curl | Haxx | 7.32.0 (including) | 7.32.0 (including) |