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

Understanding API attackers and their methods

In this opening section, we will examine the different methods a would-be attacker can employ to exploit an API, including passive and active traffic interception; finding API keys; fuzzing APIs for endpoints, their methods, and associated passwords; and cracking JSON Web Tokens (JWTs).

Using an appropriate combination of these methods will allow an attacker to launch a successful discovery phase on an API from where further specific attacks can be launched.

Interacting with APIs

APIs are, by their nature, headless; in other words, they do not expose a user interface that can be used to exercise their functionality. An attacker has many methods to interact with an API to discover and exploit weaknesses. Usually, the first step will be to passively examine API traffic using an intercepting proxy (such as Burp Suite) or with an API testing tool such as Postman. The attacker’s goal at this stage is to understand how the API...