Integer underflow in the EVP_DecodeUpdate function in crypto/evp/encode.c in the base64-decoding implementation in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via crafted base64 data that triggers a buffer overflow.
https://www.openssl.org/news/secadv_20150319.txt
https://support.citrix.com/article/CTX216642
https://security.gentoo.org/glsa/201503-11
https://kc.mcafee.com/corporate/index?page=content&id=SB10110
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://bugzilla.redhat.com/show_bug.cgi?id=1202395
https://bto.bluecoat.com/security-advisory/sa92
https://access.redhat.com/articles/1384453
http://www.ubuntu.com/usn/USN-2537-1
http://www.securitytracker.com/id/1031929
http://www.securityfocus.com/bid/73228
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/cpujan2016-2367955.html
http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.fortiguard.com/advisory/2015-03-24-openssl-vulnerabilities-march-2015
http://www.debian.org/security/2015/dsa-3197
http://rhn.redhat.com/errata/RHSA-2015-0800.html
http://rhn.redhat.com/errata/RHSA-2015-0752.html
http://rhn.redhat.com/errata/RHSA-2015-0716.html
http://rhn.redhat.com/errata/RHSA-2015-0715.html
http://marc.info/?l=bugtraq&m=144050297101809&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=143213830203296&w=2
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00027.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152844.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152734.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152733.html
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10680