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 3: Broken Authentication

Perhaps the most crucial security requirement of all – authentication – is necessary to verify and confirm identity in an ASP.NET web application. Failing to implement strong authentication allows hackers to expose this flaw and exploit it to gain forbidden access.

Weak password policies, missing brute-force attack prevention mechanisms, weakly hashed passwords, and long active sessions are a few root causes of these authentication defects. Proper credential management and session configuration are key in preventing these vulnerabilities in code. This chapter will teach us how to fix these issues.

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

  • Fixing incorrect restrictions of excessive authentication attempts
  • Fixing insufficiently protected credentials
  • Fixing user enumeration
  • Fixing weak password requirements
  • Fixing insufficient session expiration

By the end of this chapter, you will...