CVE-2018-1000155: Opennetworking Openflow

Critical severity, CVSS 9.8. EPSS: 1.2% chance of exploitation in the next 30 days.

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.

Affected products

• Opennetworking Openflow: affected versions not specified

Published 2018-05-24. Last modified 2026-06-17.