This is the writeup if you want details, certainly I'm no expert on this particular hack: http://illmatics.com/Remote%20Car%20Hacking.pdf
What I'm saying is that Tesla seems to have learned from that experience and gone with a very different architecture where vehicle commands simply aren't accessible to the public-facing computer, from which motor/brake/steering control systems only get general direction (e.g. waypoints).
That's not saying it can't have a hole. But they don't seem to have made the kind of messup that would permit an attack like the Jeep hack.
Maybe. From a few decades in the industry in and around security, I have no faith in assuming that a serious vulnerability triggers any kind of change in the culture that led to it.
Remember Cisco and curl? https://news.ycombinator.com/item?id=19507225
Hopefully. Remember this vulnerability:
https://www.csoonline.com/article/2951746/hackers-remotely-t...
The initial intrusion was through the infotainment system but from there they moved to the more critical systems.