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In a lot of cases there are multiple CAN or similar buses, like one for engine components, one for accessories, one for emissions (OBD2), etc. There definitely
by tdicola 12y ago
In a lot of cases there are multiple CAN or similar buses, like one for engine components, one for accessories, one for emissions (OBD2), etc. There definitely are valid concerns with malicious attacks, but they can be mitigated a bit by separating devices to different buses.
- emcrazyone 12y agoSee my response above. There is a firewall. I won't divulge too many details other than what anyone can learn by simply disassembling a SYNC module but will say all software for SYNC must be signed and approved by Ford. The SYNC module has two CPUs. The Freescale iMX handles all the graphics and I think it was a V850 from Renesance that handles all vehicle bus communication. Between these two CPUs there is a firewall which restricts what the graphics processor (iMX) can & can't get out on the CAN bus. The communication is essentially proxied; 3rd party software doesn't have a direct connection to any vehicle network. And the concern is precisely as you said. They don't want 3rd party software setting off air bags as the inside joke always was.