Sql Injection Challenge 5 Security Shepherd -

The backend code likely uses a function that replaces single quotes ( ' ) with backslash-escaped quotes ( \' ).

Let's go through the actual process of solving Challenge 5 using the double quote injection.

The Security Shepherd, an OWASP flagship project, is a web and mobile application security training platform used worldwide. It presents users with a series of lessons and challenges that mirror common security flaws found in the OWASP Top 10 list, such as Cross-Site Scripting (XSS), Broken Authentication, and, of course, SQL Injection. Sql Injection Challenge 5 Security Shepherd

The core lesson is that simply escaping certain characters is an insufficient defense against SQL injection. The example clearly shows how a developer can escape single quotes but be completely vulnerable to double quotes. A comprehensive, parameterized approach is required.

// Secure Example (Java) String query = "SELECT * FROM users WHERE username = ?"; PreparedStatement pstmt = connection.prepareStatement(query); pstmt.setString(1, username); ResultSet results = pstmt.executeQuery(); Use code with caution. The backend code likely uses a function that

: The application likely uses a basic SQL query to verify coupons, such as: SELECT coupon_code FROM coupons WHERE coupon_code = 'User_Input';

SELECT coupon_code FROM coupons WHERE coupon_code = 'USER_INPUT'; Use code with caution. It presents users with a series of lessons

: The goal is to terminate the string context and inject SQL. You need a payload that executes SQL while respecting the backslash escape and the double quote wrapper.

Payload: