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CVE-2015-0205

Published: 8 January 2015

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.

Notes

AuthorNote
mdeslaur
precise isn't actually affected, as the code used to be wrong,
resulting in a no-op, and having the same result as this
security fix. See the following commit:
https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=c2770c0e0e0da5f447227553c248f9a94504ee4e

Priority

Low

Status

Package Release Status
openssl
Launchpad, Ubuntu, Debian
upstream
Released (1.0.1k)
lucid Not vulnerable

precise Not vulnerable

trusty
Released (1.0.1f-1ubuntu2.8)
utopic
Released (1.0.1f-1ubuntu9.1)
Patches:
upstream: https://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=98a0f9660d374f58f79ee0efcc8c1672a805e8e8 (1.0.1)
openssl098
Launchpad, Ubuntu, Debian
upstream Not vulnerable

lucid Does not exist

precise Not vulnerable

trusty Does not exist
(trusty was not-affected)
utopic Not vulnerable