https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7219335/
how CAN bus works: https://payatu.com/blog/kartheek.lade/automotive-security-pa...
i’m aware that on this case there was something even dumber, an unsecured api endpoint, but as far as i know, if you’ve managed to reach the system you can do anything with any other connected device. there should not be a way to be able to do whatever you want just because you have access to the network.
[0] - https://www.techrepublic.com/resource-library/whitepapers/tc...
iow, it's not a "radio channels" company.
When you look at the physical layer it's just a 1.5 mbit data stream carrying whatever you want, pointed at most of North America. Over time some of that bandwidth was carved out for data services at the expense of audio quality.
For example, legislators and regulators allowed this kind of laxity to be commercially advantageous.
Voters allowed legislators and regulators to ignore the issue.
To some extent, parents failed to instill in their children the civic virtue of voting wisely.
Etc.