libzmq (aka) ZeroMQ is vulnerable to man-in-the-middle (MitM) attacks. To accept a connection as client or server, stream_engine.cpp
does not properly validate that the protection mechanism set on the socket matches that of the other party.
lists.opensuse.org/opensuse-updates/2014-11/msg00027.html
lists.opensuse.org/opensuse-updates/2014-11/msg00101.html
seclists.org/oss-sec/2014/q3/754
seclists.org/oss-sec/2014/q3/776
secunia.com/advisories/62262
www.securityfocus.com/bid/70157
bugzilla.redhat.com/show_bug.cgi?id=1147311
exchange.xforce.ibmcloud.com/vulnerabilities/96241
github.com/zeromq/libzmq/issues/1190
github.com/zeromq/libzmq/pull/1188