From Day Zero to Zero Day
From Day Zero to Zero Day
By: Eugene Lim | Publisher: No Starch Press | Year: 2025
ISBN: 9781718503946
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Description
Zero days aren’t magic—they’re missed opportunities. From Day Zero to Zero Day teaches you how to find them before anyone else does.
In this hands-on guide, award-winning white-hat hacker Eugene “Spaceraccoon” Lim breaks down the real-world process of vulnerability discovery. You’ll retrace the steps behind past CVEs, analyze open source and embedded targets, and build a repeatable workflow for uncovering critical flaws in code.
Whether you’re new to vulnerability research or sharpening an existing skill set, this book will show you how to think—and work—like a bug hunter.
You’ll learn how to:
- Identify promising targets across codebases, protocols, and file formats.
- Trace code paths with taint analysis and map attack surfaces with precision.
- Reverse engineer binaries using Ghidra, Frida, and angr.
- Apply coverage-guided fuzzing, symbolic execution, and variant analysis.
- Build and validate proof-of-concept exploits to demonstrate real-world impact.
More than a toolkit, this is a window into how top vulnerability researchers approach the work. You’ll gain not just techniques but also the mindset to go deeper, ask better questions, and find what others miss.
If you’re ready to stop reading write-ups and start writing them, From Day Zero to Zero Day is your guide.
Table of contents
Foreword by Jacob Soo, Foreword by Shubham Shah, aka shubsIntroduction
Chapter 0: Day Zero
Chapter 1: Taint Analysis
Chapter 2: Mapping Code to Attack Surface
Chapter 3: Automated Variant Analysis
Chapter 4: Binary Taxonomy
Chapter 5: Source and Sink Discovery
Chapter 6: Hybrid Binary Analysis
Chapter 7: Quick and Dirty Fuzzing
Chapter 8: Coverage-Guided Fuzzing
Chapter 9: Fuzzing Everything
Chapter 10: Beyond Day Zero
About the Author
Eugene Lim (aka “Spaceraccoon”) is a security researcher and white-hat hacker who has reported hundreds of vulnerabilities across enterprise software, hardware, and cloud services. In 2021, he was one of five researchers selected from a pool of over one million for HackerOne’s H1 Elite Hall of Fame. His research has been featured at Black Hat and DEF CON and in WIRED and The Register.