Department of Homeland Security issued an alert Tuesday warning that small aircraft are vulnerable to hackers that can gain physical access to a plane. A CAN bus is a piece of hardware used by automobiles and small aircraft that allow microcontrollers and devices to communicate with each other in applications, in the absence of a host computer. CAN bus hacking is behind multiple hacks of cars including researchers Chris Valasek and Charlie Miller s famous hack of a Jeep in 2014. A hacker can easily manipulate aircraft telemetry data, which can result in loss of control of the airplane.
Source: https://threatpost.com/dhs-warning-small-aircraft-hacking/146795/