BACnet Stack: Denial of Service (Infinite Loop) in handler_read_property_multiple via malformed RPM requests

BACnet Stack is a BACnet open source protocol stack C library for embedded systems. Prior to versions 1.4.5, 1.5.1, and 1.6.0, a Denial of Service (DoS) vulnerability exists in the BACnet stack's ReadPropertyMultiple (RPM) handler. When processing a malformed RPM request packet that lacks the expected closing tags, the function handler_read_property_multiple enters an infinite loop. This issue has been patched in versions 1.4.5, 1.5.1, and 1.6.0.