The ssl_parse_client_key_exchange function in XySSL before 0.9 does not protect against certain Bleichenbacher attacks using chosen ciphertext, which allows remote attackers to recover keys via unspecified vectors.
Xyssl
CVE-2008-7129
XySSL before 0.9 allows remote attackers to cause a denial of service (infinite loop) via an X.509 certificate that does not pass the RSA signature check during verification.