OpenSSL released security advisory [1] which fixes the below issue: An OpenSSL server will accept a DH certificate for client authentication without the certificate verify message. This effectively allows a client to authenticate without the use of a private key. This only affects servers which trust a client certificate authority which issues certificates containing DH keys: these are extremely rare and hardly ever encountered. [1]: https://www.openssl.org/news/secadv_20150108.txt
Upstream commit that looks to fix the problem: https://github.com/openssl/openssl/commit/1421e0c584ae9120ca1b88098f13d6d2e90b83a3 External References: https://www.openssl.org/news/secadv_20150108.txt
Created openssl tracking bugs for this issue: Affects: fedora-all [bug 1181013]
openssl-1.0.1k-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
Statement: This issue does not affect the version of openssl and openssl097a as shipped with Red Hat Enterprise Linux 5. This issue does not affect the version of openssl098e as shipped with Red Hat Enterprise Linux 6 and 7.
openssl-1.0.1e-41.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Via RHSA-2015:0066 https://rhn.redhat.com/errata/RHSA-2015-0066.html