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 1: Secure Coding Fundamentals

Understanding secure coding principles is one of the foundations of being a security minded ASP.NET Core developer. Applying these concepts in practice by writing secure code will help your web applications improve their security posture.

This introductory chapter is all about basic secure coding patterns that every ASP.NET Core developer must know. Learning about these defensive techniques will help you mitigate security vulnerabilities in code, and with these recipes, you will be able to understand how to implement proper input validation by using whitelisting, perform input sanitization, and how to escape output and protect data.

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

  • Enabling whitelist input validation using validation attributes
  • Whitelist validation using the FluentValidation library
  • Syntactic and semantic validation
  • Input sanitizing
  • Input sanitization using the HTMLSanitizer library...