[Vox_Leone]

>>Spoofing a CAN or ARINC429 bus requires physical access. At that point an attacker has access to the physical systems of the plane, at which point the plane is compromised anyway.

I gather a perp only has to access the right piece of equipment in any phase of the logistics.

These buses are employed mostly in the avionics industry, but they are also utilized in ground vehicles, weapons systems, and other commercial and military equipment industries.[1]

[1] https://www.logic-fruit.com/glossary/arinc-429-guide/

[numpad0]

That sounds like saying that one could potentially launch a nuke by walking into an operational nuclear submarine and pressing buttons in the right order.