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 2: Injection Flaws

Injection flaws in code can have the most devastating effects on ASP.NET Core web applications. The lack of validation and sanitization of untrusted input allows this vulnerability to be exploited, leading to the execution of arbitrary OS commands, authentication bypass, unexpected data manipulation, and content. At worse, it can disclose sensitive information and lead to an eventual data breach.

This chapter introduces you to various injection flaws and explains how you can remediate this security defect in code.

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

  • Fixing SQL injection with Entity Framework
  • Fixing SQL injection in ADO.NET
  • Fixing NoSQL injection
  • Fixing command injection
  • Fixing LDAP injection
  • Fixing XPath injection

By the end of this chapter, you will learn how to properly write secure code and remove security bugs that will prevent injection attacks.