statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session.
kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
www-01.ibm.com/support/docview.wss?uid=swg21995039
www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
www.securityfocus.com/bid/93177
www.securitytracker.com/id/1036885
bto.bluecoat.com/security-advisory/sa132
git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
www.openssl.org/news/secadv/20160926.txt
www.tenable.com/security/tns-2016-16
www.tenable.com/security/tns-2016-20