The ssl3_get_key_exchange function in s3_clnt.c in OpenSSL before 0.9.8zd, 1.0.0 before 1.0.0p, and 1.0.1 before 1.0.1k allows remote SSL servers to conduct ECDHE-to-ECDH downgrade attacks and trigger a loss of forward secrecy by omitting the ServerKeyExchange message.
https://www.openssl.org/news/secadv_20150108.txt
https://support.citrix.com/article/CTX216642
https://support.apple.com/HT204659
https://kc.mcafee.com/corporate/index?page=content&id=SB10108
https://kc.mcafee.com/corporate/index?page=content&id=SB10102
https://github.com/openssl/openssl/commit/b15f8769644b00ef7283521593360b7b2135cb63
https://bto.bluecoat.com/security-advisory/sa88
http://www.securitytracker.com/id/1033378
http://www.securityfocus.com/bid/71942
http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
http://www.mandriva.com/security/advisories?name=MDVSA-2015:062
http://www.mandriva.com/security/advisories?name=MDVSA-2015:019
http://www.debian.org/security/2015/dsa-3125
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150310-ssl
http://rhn.redhat.com/errata/RHSA-2015-0066.html
http://marc.info/?l=bugtraq&m=144050297101809&w=2
http://marc.info/?l=bugtraq&m=144050254401665&w=2
http://marc.info/?l=bugtraq&m=144050205101530&w=2
http://marc.info/?l=bugtraq&m=144050155601375&w=2
http://marc.info/?l=bugtraq&m=143748090628601&w=2
http://marc.info/?l=bugtraq&m=142895206924048&w=2
http://marc.info/?l=bugtraq&m=142721102728110&w=2
http://marc.info/?l=bugtraq&m=142720981827617&w=2
http://marc.info/?l=bugtraq&m=142496289803847&w=2
http://marc.info/?l=bugtraq&m=142496179803395&w=2
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00026.html
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00027.html
http://lists.opensuse.org/opensuse-security-announce/2015-01/msg00021.html
http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10679