Union-Based SQL Injection: Logging in with a Temporary User in OWASP Juice Shop

Union-Based SQL Injection is a technique used to manipulate query results by combining data from multiple sources within a database. This lab focuses on exploiting a login query in the OWASP Juice Shop application to create a temporary user dynamically during query execution. By leveraging this advanced SQL Injection technique, you will bypass the authentication mechanism without leaving any persistent changes in the database.

In this lab, you will craft a UNION SELECT payload to inject a temporary user into the query result. This will allow you to log in with a non-existent account, demonstrating how such vulnerabilities can be exploited in real-world scenarios and emphasizing the importance of securing database queries against injection attacks.

Objectives

Upon completing this lab, you will:

• Understand how Union-Based SQL Injection works to manipulate query results.
• Craft advanced SQL Injection payloads to bypass authentication.
• Learn about the risks associated with improperly validated database queries.

Who is this lab for?

This lab is ideal for:

• Developers looking to understand and prevent SQL Injection vulnerabilities.
• Security Enthusiasts aiming to explore advanced query manipulation techniques.
• IT Professionals learning about secure authentication practices and database query protections.