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)

Fixing disabled security features

Adding layers of defense and protection helps an ASP.NET Core web application from getting exploited. Web application servers have built-in security features such as security headers configured to be sent as a part of the HTTP response back to the client, instructing browsers to enable the security mechanism. Not all of these security headers are turned on or added by default, so enabling it in code is left in the web developers' hands.

In this recipe, we are going to add the missing HTTP security headers to enable protection in our sample Online Banking app.

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\disabled-security-features\before\OnlineBankingApp\.

You can perform the steps in this folder to fix the missing security features in this recipe.

How to do it…

Let's take a look at the steps for this...