Ford Focus ECU fuzzing at DEFCON 23 Car Hacking Village

GRIMM demonstrates the use of Intrepid Control Systems' Vehicle Spy software suite to automatically fuzz test the ECU with unpredictable, invalid or randomly-generated test data. To the right, you can see that the gauge cluster and multi-function display isn't quite sure what to do with the data. This kind of testing methodology can help curious tinkerers better understand the data on the CAN Bus and may uncover problems or vulnerabilities within integrated automobile control systems that might rarely if ever manifest themselves during manual testing, observation or reverse-engineering.