Sometimes the WAF or input filter blocks SELECT , SUBSTRING , or spaces. Use:
This article explores the intricacies of this specific challenge, providing a step-by-step walkthrough, explaining the underlying vulnerability, and outlining the key security takeaways for building more robust applications.
: The injection forces the query to return a "true" result for the coupon check, applying a massive discount (often reducing the price to $0 or $1) and allowing you to complete the order and receive your result key . Summary Table Expected Response 1 Enter ' OR '1'='1 Likely fails (escaped to \' ) 2 Enter " OR "1"="1 Succeeds (if double quotes aren't escaped) 3 Submit Order Order completes and displays the result key Sql Injection Challenge 5 Security Shepherd
Before we dissect the challenge, it is important to understand the training environment. OWASP Security Shepherd is a web application security training platform that covers the OWASP Top 10 vulnerabilities, including SQL injection, cross-site scripting (XSS), and broken authentication. The platform is structured through a series of lessons and challenges, guiding users from basic concepts to advanced exploitation techniques. The "SQL Injection Escaping Challenge" is one of the core modules that forces students to think beyond standard attack payloads and understand the mechanics of data sanitization.
While this appears safe to a novice developer, it neglects a foundational rule of parsing logic: The Character Collision Sometimes the WAF or input filter blocks SELECT
: Alternatively, depending on the environment build, it relies on context layout tracking (such as utilizing valid database characters to bypass logic gates, or forcing syntax errors that leak information via error-based injection).
Assuming the challenge requires a properly formatted input to bypass the input validation—a common feature in this scenario—here is how to approach it. Step 1: Discover Valid Input Format Summary Table Expected Response 1 Enter ' OR
According to community discussions about this challenge, the goal often involves retrieving a hidden couponcode value, sometimes with a troll parameter associated with it.
Input: ' OR '1'='1
To move forward in your learning journey:
--dump : Instructs the tool to automatically find the vulnerable parameter, determine the injection type (Boolean/Time-blind), extract the table schemas, and dump the flag data onto your terminal. How to Fix the Defect: Secure Coding Remediation