Re: All cars have split CAN buses
If any carmaker is integrating digital entertainment systems (especially internet-enabled ones) and car controls, I would like to know who that is so I can forever shun them.
It's exactly what Jeep did. The 'infotainment' system needs signals from the CANbus for stuff like switching to the rear camera when reverse gear is engaged, blocking video playback if the handbrake isn't on, etc. The entertainment part was supposed to be firewalled off from the main bus, and only able to receive such data, but the hackers found a bug in the phone system that allowed them to remotely rewrite the firmware in the infotainment system so that it could effectively become a bus master. Job done...
Even a CANbus-USB bridge of the sort described in the article is potentially open to such an attack, if there are bugs in the USB-side firmware.