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

Other API attacks

Finally, let us conclude this chapter with an overview of the catch-all API attacks not covered in one of the broader OWASP API Security Top 10 categories already covered.

API abuse

First, API abuse is considered an API attack that is not reliant on an actual vulnerability in the API itself but rather the abuse of the API, usually by using it in a way in which it was not intended. Typically, this attack vector includes excessive data exfiltration via APIs (think of scraping data from airline booking sites or estate agencies) or via discovering APIs’ underlying websites and using them in ways that are not possible via the website.

Unrestricted access to sensitive business flows

This is a new vulnerability category in the OWASP API Security Top 10 in 2023 that, like API abuse, revolves around using an API (or a collection of APIs) to exploit the underlying business flow it enables. The canonical example is an online booking system whereby an attacker...