Anonymous ID: 258363 July 11, 2021, 10:50 p.m. No.14104992   🗄️.is đź”—kun

>>14104975

https://techcrunch.com/2020/08/06/security-bugs-mercedes-benz-hack/

 

By tampering with the TCU’s file system, the researchers got access to a root shell — a way to run commands with the highest level of access to the vehicle’s internals. With root shell access, the researchers could remotely open the car’s doors.

 

The TCU file system also stores the car’s secrets, like passwords and certificates, which protect the vehicle from being accessed or modified without proper authorization. But the researchers were able to extract the passwords of several certificates for several different regions, including Europe and China. By obtaining the vehicle’s certificates and their passwords, the researchers could gain deep access to the vehicle’s internal network. The car’s certificate for the China region had a weak password, Yan said, making it easier to hijack a vulnerable car in the country.

 

Yan said the goal was to get access to the car’s back end, the core of the vehicle’s internal network. As long as the car’s back-end services can be accessed externally, the car is at risk of attacks, the researchers said.

 

The way the researchers did this was by tearing down the vehicle’s embedded SIM card, which allows the car to talk to the cell networks. A security feature meant the researchers couldn’t plug the SIM into a router without freezing access to the cell network. The researchers modified their router to spoof the vehicle, effectively making the cell network think it was the car.

 

With the vehicle’s firmware dumped, the networking protocols understood and its certificates obtained and cracked, the researchers say they could remotely control an affected vehicle.