Bypassing Security Mechanisms

libzmq aka ZeroMQ is vulnerable to bypassing security mechanisms or downgrade attacks. The vulnerability exists because ZMTP V3 protocol handler sends ZMTP v2 or earlier headers...

CVE-2014-9721

libzmq before 4.0.6 and 4.1.x before 4.1.1 allows remote attackers to conduct downgrade attacks and bypass ZMTP v3 protocol security mechanisms via a ZMTP v2 or earlier header...