Injection Challenge 5 Security Shepherd | Sql

admin' AND ASCII(SUBSTRING((SELECT table_name FROM information_schema.tables WHERE table_schema=database() LIMIT 0,1),1,1)) = 117 -- -

// Secure code architecture using Prepared Statements String query = "SELECT * FROM coupons WHERE code = ?"; try (PreparedStatement pstmt = connection.prepareStatement(query)) // The driver automatically types and handles data bounds safely pstmt.setString(1, userInputCode); try (ResultSet results = pstmt.executeQuery()) while (results.next()) // Process retrieved coupon information securely catch (SQLException e) // Professional error handling that hides backend architecture details Use code with caution.

Security Shepherd SQL Injection Challenge 5 bridges the gap between basic authentication bypass and full data exfiltration. It teaches the attacker to:

SELECT * FROM customers WHERE customerId="[USER INPUT]"

If the query returns a row, login succeeds; otherwise, it fails. No error is shown — only “Login success” or “Login failed”. Sql Injection Challenge 5 Security Shepherd

String query = "SELECT * FROM users WHERE username = ?"; PreparedStatement pstmt = connection.prepareStatement(query); pstmt.setString(1, userInput); // Safe parameterization ResultSet resultSet = pstmt.executeQuery(); Use code with caution. 2. Implement the Principle of Least Privilege

to complete a purchase without being charged, which ultimately reveals the result key. Exploitation Steps Identify the Filter : Standard payloads like ' OR 1=1;--

SELECT * FROM users WHERE username = '[input_user]' AND password = '[input_pass]'

Once executed, the application displays the valid VIP database record or immediately generates the gamified solution key on your screen. Remediation Strategies for Developers No error is shown — only “Login success”

: Once logged in or authorized, use the revealed VIP Coupon Code in the "Troll" purchase screen. Ensure the troll amount is set to is greater than or equal to 1

Below is a comprehensive guide to understanding, exploiting, and remediating the SQL Injection Challenge 5 in OWASP Security Shepherd. Understanding the Vulnerability: Blind Time-Based SQLi

SQL Injection Challenge 5: Security Shepherd Walkthrough The (SQLi C5) in OWASP Security Shepherd is a practical lesson in identifying and exploiting poorly sanitized database queries. This specific level, titled "VIP Coupon Check," tasks users with bypassing a coupon validation system to retrieve sensitive data or flags. Challenge Overview

The application will execute the query. Instead of showing the search results for the original query, it will inject the result of our second query. The password (or flag) for the Admin user will appear in the spot where the username or other data is usually displayed on the webpage. Implement the Principle of Least Privilege to complete

For blind or time-based challenges, automation with sqlmap is very efficient and can help you understand the process.

The Java source code for this challenge reveals how the query is constructed:

While tools like sqlmap can automate many aspects of SQL injection, they are not a substitute for understanding. This challenge, as noted by various security practitioners, can be solved by crafting a specific, manual payload. This process hones manual testing abilities, which are often crucial when dealing with custom filtering or application-specific logic that automated tools may miss.