Book Image

ASP.NET Core 5 Secure Coding Cookbook

By : Roman Canlas
Book Image

ASP.NET Core 5 Secure Coding Cookbook

By: Roman Canlas

Overview of this book

ASP.NET Core developers are often presented with security test results showing the vulnerabilities found in their web apps. While the report may provide some high-level fix suggestions, it does not specify the exact steps that you need to take to resolve or fix weaknesses discovered by these tests. In ASP.NET Secure Coding Cookbook, you’ll start by learning the fundamental concepts of secure coding and then gradually progress to identifying common web app vulnerabilities in code. As you progress, you’ll cover recipes for fixing security misconfigurations in ASP.NET Core web apps. The book further demonstrates how you can resolve different types of Cross-Site Scripting. A dedicated section also takes you through fixing miscellaneous vulnerabilities that are no longer in the OWASP Top 10 list. This book features a recipe-style format, with each recipe containing sample unsecure code that presents the problem and corresponding solutions to eliminate the security bug. You’ll be able to follow along with each step of the exercise and use the accompanying sample ASP.NET Core solution to practice writing secure code. By the end of this book, you’ll be able to identify unsecure code causing different security flaws in ASP.NET Core web apps and you’ll have gained hands-on experience in removing vulnerabilities and security defects from your code.
Table of Contents (15 chapters)

Chapter 6: Broken Access Control

Authorization is just as significant and essential as authentication. It defines what an authenticated user can perform and execute, and resources and web pages need to have defined privileges to limit unauthorized access. Permission bypass and missing or improper access controls are some of the broken access control vulnerabilities discovered in an ASP.NET Core web application.

In this chapter, we're going to cover the following recipes:

  • Fixing insecure direct object references (IDOR)
  • Fixing improper authorization
  • Fixing missing access control
  • Fixing open redirect vulnerabilities

By the end of this chapter, you will have learned how to use the built-in authorization mechanism in ASP.NET Core. You will properly implement role-based authorization to prevent unauthorized access to resources in your web application. Also, you will see how to utilize safer redirection methods to prevent open redirection attacks.