Book Image

Fuzzing Against the Machine

By : Antonio Nappa, Eduardo Blázquez
Book Image

Fuzzing Against the Machine

By: Antonio Nappa, Eduardo Blázquez

Overview of this book

Emulation and fuzzing are among the many techniques that can be used to improve cybersecurity; however, utilizing these efficiently can be tricky. Fuzzing Against the Machine is your hands-on guide to understanding how these powerful tools and techniques work. Using a variety of real-world use cases and practical examples, this book helps you grasp the fundamental concepts of fuzzing and emulation along with advanced vulnerability research, providing you with the tools and skills needed to find security flaws in your software. The book begins by introducing you to two open source fuzzer engines: QEMU, which allows you to run software for whatever architecture you can think of, and American fuzzy lop (AFL) and its improved version AFL++. You’ll learn to combine these powerful tools to create your own emulation and fuzzing environment and then use it to discover vulnerabilities in various systems, such as iOS, Android, and Samsung's Mobile Baseband software, Shannon. After reading the introductions and setting up your environment, you’ll be able to dive into whichever chapter you want, although the topics gradually become more advanced as the book progresses. By the end of this book, you’ll have gained the skills, knowledge, and practice required to find flaws in any firmware by emulating and fuzzing it with QEMU and several fuzzing engines.
Table of Contents (18 chapters)
Part 1: Foundations
Part 2: Emulation and Fuzzing
Part 3: Advanced Concepts
Chapter 12: Conclusion and Final Remarks

Case Study: OpenWrt System Fuzzing for ARM

In previous chapters, we explored the capabilities of Triforce for fuzzing an OpenWrt system, as demonstrated in Chapter 8. In this chapter, we will take it a step further by applying TriforceAFL to fuzz a system with the ARM architecture. We will learn how to modify the existing project from the previous chapters for this specific architecture, how to run an OpenWrt system with ARM emulation, and the changes required in TriforceAFL files to support this new architecture.

The following topics will be covered in this chapter:

  • Emulating the ARM architecture to run an OpenWrt system
  • Installing TriforceAFL for ARM
  • Running TriforceAFL in OpenWrt for ARM
  • Obtaining a crash

In the next section, we need to download the necessary files to run OpenWrt on the ARM architecture, which is different from the approach used in the previous chapter where we compiled from sources. Additionally, we will download debug files, extract...