WebCTRL systems that communicate over BACnet inherit the protocol's lack
of network layer authentication. WebCTRL does not implement additional
validation of BACnet traffic so an attacker with network access could
spoof BACnet packets directed at either the WebCTRL server or associated
AutomatedLogic controllers. Spoofed packets may be processed as
legitimate.
Credits
Jonathan Lee, Thuy D. Nguyen, and Neil C. Rowe of the Naval Postgraduate School reported this vulnerability to CISA.
