Saturation/Exhaustion of Spacecraft Resources: Avionics Bus Flooding

This technique involves overwhelming the avionics bus by injecting an excessive volume of messages, leading to the saturation or exhaustion of communication resources. An attacker can achieve this by gaining control over an ECU (Electronic Control Unit) or microcontroller with access to the bus (e.g., on the CAN bus). This access may be obtained through exploitation of system vulnerabilities or by physically connecting a compromised device to the bus. By flooding the bus with high-priority messages, the attacker can suppress lower-priority communications, causing delays, denial of service, or complete failure of mission-critical operations.