As I'm currently on vacation I don't have the means to study this further, but on the quick lookout I found at least one problem in how this is described. If I

As I'm currently on vacation I don't have the means to study this further, but on the quick lookout I found at least one problem in how this is described. If I understand correctly it alters frames so that the device goes off bus. From their claims this is not detectable with modern tools. If I'm not missing something then I can guarantee you that the dashboard reports errors when a device is off bus. Also at least modern VW and BMW vehicles offer a lot of data (to the diagnostic tool) on the state of the can networks (dropped frames/etc). I'll have to dig deeper, but on the first glance it looks like they found a way to buss off devices, but over-prpmise on the stealthines of the vuln. Edit: typos