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OpenSSL DH client certificates accepted without verification [Server] (CVE-2015-0205)

Severity CVSS Published Added Modified
5 (AV:N/AC:L/Au:N/C:N/I:P/A:N) January 09, 2015 January 09, 2015 January 04, 2017

Description

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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References

Solution

http-openssl-1_0_0-upgrade-1_0_0_p

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