SSL/TLS DH Certificate Authentication Bypass Vulnerability

CVE-2015-0205 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

The ssl3_get_cert_verify function in s3_srvr.c in OpenSSL 1.0.0 before 1.0.0p and 1.0.1 before 1.0.1k accepts client authentication with a Diffie-Hellman (DH) certificate without requiring a CertificateVerify message, which allows remote attackers to obtain access without knowledge of a private key via crafted TLS Handshake Protocol traffic to a server that recognizes a Certification Authority with DH support.

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