OpenSSL is vulnerable to protection mechanism bypass. This is because OpenSSL accepts several variations of certificate signature algorithms and signature encodings. It doesn’t then enforce a match between the signature algorithm between the signed and unsigned portions of the certificate. This only affects custom applications which rely on the uniqueness of the fingerprint.
kb.juniper.net/InfoCenter/index?page=content&id=JSA10679
lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
lists.fedoraproject.org/pipermail/package-announce/2015-January/148363.html
lists.opensuse.org/opensuse-security-announce/2015-01/msg00021.html
lists.opensuse.org/opensuse-security-announce/2015-03/msg00027.html
lists.opensuse.org/opensuse-security-announce/2015-05/msg00026.html
lists.opensuse.org/opensuse-security-announce/2015-07/msg00037.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00011.html
marc.info/?l=bugtraq&m=142496179803395&w=2
marc.info/?l=bugtraq&m=142496289803847&w=2
marc.info/?l=bugtraq&m=142720981827617&w=2
marc.info/?l=bugtraq&m=142721102728110&w=2
marc.info/?l=bugtraq&m=142895206924048&w=2
marc.info/?l=bugtraq&m=143748090628601&w=2
marc.info/?l=bugtraq&m=144050155601375&w=2
marc.info/?l=bugtraq&m=144050205101530&w=2
marc.info/?l=bugtraq&m=144050254401665&w=2
marc.info/?l=bugtraq&m=144050297101809&w=2
rhn.redhat.com/errata/RHSA-2015-0066.html
rhn.redhat.com/errata/RHSA-2015-0800.html
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150310-ssl
www.debian.org/security/2015/dsa-3125
www.mandriva.com/security/advisories?name=MDVSA-2015:019
www.mandriva.com/security/advisories?name=MDVSA-2015:062
www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
www.securityfocus.com/bid/71935
www.securitytracker.com/id/1033378
bto.bluecoat.com/security-advisory/sa88
github.com/openssl/openssl/commit/684400ce192dac51df3d3e92b61830a6ef90be3e
github.com/openssl/openssl/commit/cb62ab4b17818fe66d2fed0a7fe71969131c811b
kc.mcafee.com/corporate/index?page=content&id=SB10102
kc.mcafee.com/corporate/index?page=content&id=SB10108
support.apple.com/HT204659
support.citrix.com/article/CTX216642
www.openssl.org/news/secadv/20150108.txt
www.openssl.org/news/secadv_20150108.txt