The SSL/TLS server implementation in OpenSSL 0.9.7 before 0.9.7h and 0.9.8 before 0.9.8a, when using the SSL_OP_MSIE_SSLV2_RSA_PADDING option, disables a verification step that is required for preventing protocol version rollback attacks, which allows remote attackers to force a client and server to use a weaker protocol than needed via a man-in-the-middle attack.
Software | From | Fixed in |
---|---|---|
openssl / openssl | 0.9.7 | 0.9.7.x |
openssl / openssl | 0.9.7a | 0.9.7a.x |
openssl / openssl | 0.9.7b | 0.9.7b.x |
openssl / openssl | 0.9.7c | 0.9.7c.x |
openssl / openssl | 0.9.7d | 0.9.7d.x |
openssl / openssl | 0.9.7e | 0.9.7e.x |
openssl / openssl | 0.9.7f | 0.9.7f.x |
openssl / openssl | 0.9.7g | 0.9.7g.x |
openssl / openssl | 0.9.8 | 0.9.8.x |