Sql+injection+challenge+5+security+shepherd+new -

Since ""="" is always true, the condition resolves to true for all rows, returning the entire customers table.

: Enforce strict allow-lists for expected data types (e.g., ensuring an ID is always an integer).

: Use a UNION SELECT statement with dummy values to see which columns appear on the screen. Example: 1' UNION SELECT 1,2,3--

The Escaping Challenge in Security Shepherd is not just a fun brainteaser. It teaches a profound lesson about secure development. sql+injection+challenge+5+security+shepherd+new

Using typical sleep-based payloads ( ' WAITFOR DELAY '0:0:5' -- ) yields no delay. This suggests either:

| Challenge | Focus & Key Concepts | | :--- | :--- | | | Classic ' OR '1'='1 authentication bypass. | | SQL Injection 1 | Basic union-based extraction. | | SQL Injection 2 | Advanced union and error-based techniques. | | SQL Injection 3 | Blind SQL injection fundamentals. | | SQL Injection 4 | Escaping filtered quotes via backslashes. | | SQL Injection 5 | Bypassing an escape function (escaping ' to \' ), using the backslash escape sequence \\' . | | SQL Injection 6-7 | Stored procedure and stored injection vectors. |

Submit the extracted secret key via the Shepherd web interface. Since ""="" is always true, the condition resolves

The response header contains a hint: X-Debug-Query: SELECT note FROM notes WHERE user_id = 2 AND note LIKE '%milk%'

: Attempts to dump the entire database content, including the flag. 5. Defense: How to Prevent SQL Injection

The structural vulnerability in this level stems from the developer building database queries dynamically via string concatenation. Instead of treating the coupon code strictly as a data literal, the application engine blends the payload with programmatic SQL syntax. Example: 1' UNION SELECT 1,2,3-- The Escaping Challenge

Rather than using industry-standard parameterized queries, the vulnerable backend employs a function that looks for a single quote ( ' ) and prefixes it with a backslash ( \ ) to negate its SQL functionality. This naive replacement logic looks like this conceptually: Input String: admin' Escaped Output: admin\' Use code with caution.

Why? Because my usual "lazy" habit of firing up SQLMap didn't work. The application had a filter in place that blocked my standard payloads.

The goal is to extract the session key or a specific "secret" (the lesson's result) by manipulating the input field to bypass the intended query logic. Steps to Solve Analyze the Input

couponcode from challenges SQL injection 5 · Issue #323 - GitHub