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What is Data Execution Prevention (DEP or W^X)

Chapter 31
Encyclopedia of Criminal Activities and the Deep Web
A paradigm that dictates that memory pages can have either execute or write permission but not both. Data execution prevention prevents self-modifying code and also attacks on the code that runs by itself (by exploiting buffer overflows and similar attack forcing the code to rewrite itself). DEP is a critical feature in almost all modern operating systems.
Published in Chapter:
Game Console Protection and Breaking It
Nezer Jacob Zaidenberg (College of Management, Israel)
Copyright: © 2020 |Pages: 13
DOI: 10.4018/978-1-5225-9715-5.ch031
Abstract
This article surveys protection and attacks on various game consoles. Game consoles are a special kind of embedded system that are used primarily for entertainment. Virtually all game consoles include means for digital rights management (DRM) and virtually all have been attacked. The chapter describes the various motivations behind these attacks, the way the console manufacturer acted, and the way the hacking community reacted. This article is designed based on lectures published by the actual hackers of the machine describing their efforts. The article summarizes the hackers' activities on multiple consoles over the last 20 years and does not focus on specific bug or exploit.
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