What is UDS?

• UDS stands for Unified Diagnostics Service

• It is present in all modern cars

• Provides access to the Services offered by ECUs

• It takes place on the top of the CAN protocol

(Layer 4)

• Allows to perform transmissions of up to 256

bytes

• It is just a Transport Protocol

https://media.defcon.org/DEF%20CON%2024/DEF%20CON%2024%20workshops/DEFCON-24-Workshop-Javier-Vazquez-You-CAN-haz-car-Secretz-UPDATED.pdf