In March 2020, Google patched a critical vulnerability affecting many MediaTek based devices. This vulnerability had been known by MediaTek since April 2019, and later exploited in the wild! In this post, we give some details about this vulnerability and see how we can use it to achieve kernel memory reads and writes.

Third part of a blog post series about our approach to reverse engineer a Philips TriMedia based IP camera.

In this second blog post of our series on Samsung's TrustZone, we present the various tools that we have developed during our research to help us reverse engineer and exploit Trusted Applications as well as Secure Drivers.

In this first article of a series of three, we will give a tour of the different components of Samsung's TrustZone, explain how they work and how they interact with each other.

Analysis of Tencent Legu: a packer for Android applications.

Qualcomm is the market-dominant hardware vendor for non-Apple smartphones. Considering the [SoCs] they produce are predominant, it has become increasingly interesting to reverse-engineer and take over their boot chain in order to get a hold onto the highest-privileged components while they are executing. Ultimately, the objective is to be able to experiment with closed-source and/or undocumented components such as hardware registers or Trusted Execution Environment Software.

This blog post presents a comparison between various disassembled binary exporters.

Broadcom is one of the major vendors of wireless devices worldwide. Since these chips are so widespread they constitute a high value target to attackers and any vulnerability found in them should be considered to pose high risk. In this blog post I provide an account of my internship at Quarkslab which included obtaining, reversing and fuzzing the firmware, and finding a few new vulnerabilities.

This blog post is about techniques to disable Android runtime restrictions