Symposium sur la sécurité des technologies de l'information et des communications

Conférence francophone sur le thème de la sécurité de l'information.
Elle a eu lieu à Rennes du 3 au 5 juin 2020.

How to design a baseband debuggerDavid Berard, Vincent Fargues

Date : 04 juin 2020 à 10:00 — 30 min.

Modern basebands are an interesting topic for reverse engineers. However, the lack of debugger for these components makes this work harder.

This article presents how a 1-day vulnerability in Samsung Trustzone can be used to rewrite the Shannon baseband memory and install a debugger on a Galaxy S7 phone. The details of the debugger development are explained and a demonstration will be done by using specific breakpoints to extract interesting informations.