Book Image

Defending APIs

By : Colin Domoney
Book Image

Defending APIs

By: Colin Domoney

Overview of this book

Along with the exponential growth of API adoption comes a rise in security concerns about their implementation and inherent vulnerabilities. For those seeking comprehensive insights into building, deploying, and managing APIs as the first line of cyber defense, this book offers invaluable guidance. Written by a seasoned DevSecOps expert, Defending APIs addresses the imperative task of API security with innovative approaches and techniques designed to combat API-specific safety challenges. The initial chapters are dedicated to API building blocks, hacking APIs by exploiting vulnerabilities, and case studies of recent breaches, while the subsequent sections of the book focus on building the skills necessary for securing APIs in real-world scenarios. Guided by clear step-by-step instructions, you’ll explore offensive techniques for testing vulnerabilities, attacking, and exploiting APIs. Transitioning to defensive techniques, the book equips you with effective methods to guard against common attacks. There are plenty of case studies peppered throughout the book to help you apply the techniques you’re learning in practice, complemented by in-depth insights and a wealth of best practices for building better APIs from the ground up. By the end of this book, you’ll have the expertise to develop secure APIs and test them against various cyber threats targeting APIs.
Table of Contents (19 chapters)
1
Part 1: Foundations of API Security
6
Part 2: Attacking APIs
10
Part 3: Defending APIs

Data attacks

Data attacks (covered in Chapter 3, Understanding Common API Vulnerabilities) are one of the most common attack vectors for an attacker since, inevitably, the data is most valuable on the black market. While data attacks are most commonly read attacks (mapping to the API3:2019 — Excessive data exposure category section), the write attack (mapping to API6:2019 — Mass assignment) can be damaging to an API since this can be used to modify permissions and confidential data of users. Let us look at both types of data attacks.

Excessive information exposure

The numerous API breach examples covered in Chapter 4, Investigating Recent Breaches, have one thing in common: they all involve excessive information exposure. APIs can expose excessive information in several ways, and as an attacker, you need to know where to look for it.

The most obvious place is in the response itself — always make sure you are looking at the API responses either in your...