For Challenge 5, the magic number is often or 4 columns.
Submit a normal alphanumeric string. Note how fast the page loads.
Security Shepherd environments use descriptive tables like users or flags . To extract the characters of a table name one by one, use the SUBSTRING() or MID() function combined with ASCII() values to avoid quote filtering.
To prevent this injection:
When this payload is processed by the flawed sanitization filter, the application alters the structural context of the query string:
admin' AND ASCII(SUBSTRING((SELECT table_name FROM information_schema.tables WHERE table_schema=database() LIMIT 0,1),1,1)) = 117 -- -
We cannot perform a UNION attack without knowing how many columns the original query retrieves. We can find this using the ORDER BY technique. Sql Injection Challenge 5 Security Shepherd
The challenge page displays an input field, typically used for a VIP Coupon Code check or similar database queries. The backend database query looks similar to this:
In this module, you are presented with a "VIP Coupon Check" input field. The backend is designed to verify if a coupon code exists in a database and, if valid, display the discount amount and the associated item name.
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In OWASP Security Shepherd Challenge 5, the user is presented with an input field—typically a verification form or a VIP Check module. The application’s business logic requires a valid coupon to complete a checkout process without being charged. The Flawed Backend Architecture
: Submit the payload. If successful, the query will return all rows (e.g., all coupons or user data), revealing the result key or a "VIP Coupon Code". Information Security Stack Exchange Tool-Based Solution (sqlmap)
We need to know the table where user data is stored. In MySQL (which Shepherd typically uses), this data is in information_schema.tables . For Challenge 5, the magic number is often or 4 columns