CVE-2018-1000155

OpenFlow version 1.0 onwards contains a Denial of Service and Improper authorization vulnerability in OpenFlow handshake: The DPID (DataPath IDentifier) in the features_reply message are inherently trusted by the controller. that can result in Denial of Service, Unauthorized Access, Network Instability. This attack appear to be exploitable via Network connectivity: the attacker must first establish a transport connection with the OpenFlow controller and then initiate the OpenFlow handshake.

Mitigation

Enable TLS in OpenFlow plugin. Upstream documentation is a useful resource.
<https://wiki.opendaylight.org/view/OpenDaylight_OpenFlow_Plugin:_TLS_Support&gt;