Wired: Car Hack Technique Uses Dealerships to Spread Malware

"...security consultant Craig Smith presented a tool designed to find security vulnerabilities in equipment that's used by mechanics and dealerships to update car software and run vehicle diagnostics, and sold by companies like Snap-On and Bosch. Smith’s invention, built with around $20 of hardware and free software that he’s released on GitHub, is designed to seek out—and hopefully help fix—bugs in those dealership tools that could transform them into a devious method of hacking thousands of vehicles."

https://www.wired.com/2015/10/car-hacking-tool-turns-repair-shops-malware-brothels/