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)

Disabling unnecessary features

Most ASP.NET Core web application features are useful, but some can be unnecessary or sometimes even harmful. Web developers must consider whether a web server or application functionality needs to be enabled in code. We need to remove some features to keep our ASP.NET Core web applications secure.

In this recipe, we are going to remove the Server HTTP header to prevent web server information disclosure.

Getting ready

We will use the Online Banking app we used in the previous recipe. Using Visual Studio Code, open the sample Online Banking app folder at \Chapter07\unnecessary-features\before\OnlineBankingApp\.

You can perform the steps in this folder to disable unnecessary features in this recipe.

How to do it…

Let's take a look at the steps for this recipe:

  1. From the starting exercise folder, launch Visual Studio Code by typing following command:
    code .
  2. Open Program.cs and notice the value of one of the properties...