Sql Injection Challenge 5 Security Shepherd Info

To solve this challenge, you need to use double quotes to break the SQL string since single quotes are being neutralized:

Payload:

: 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)

Observing that -- is not filtered in this challenge, but OR / AND are. We need a tautology without those words. Sql Injection Challenge 5 Security Shepherd

admin' AND ASCII(SUBSTRING((SELECT secret_flag FROM flags LIMIT 0,1),1,1)) > 64 -- -

By utilizing greater-than ( > ) or less-than ( < ) operators rather than absolute equals ( = ), you can perform a . This drastically cuts down the number of HTTP requests required to find the correct ASCII value of each character in the flag. Automation: Speeding Up the Process with SQLMap

Now, modify the password parameter. Change it to " OR ""=" . Your request body should look like this: To solve this challenge, you need to use

The goal is to bypass the coupon verification system. Usually, this module asks you to enter a "VIP Coupon Code" to get a reward (the result key). The application is vulnerable because it does not properly sanitize the input used in the database query. Step-by-Step Write-up

Inputting a random string or a single character yields an empty result set or an error message stating that no entries were found. This confirms that the search functionality maps directly back to database records.

: 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 We need a tautology without those words

Validate all user input against a whitelist of allowed characters. For a username field, you might restrict input to alphanumeric characters only. However, input validation is not a complete solution and should be used as a defense-in-depth measure, not a primary defense.

To solve the challenge, you must break out of the string boundary using a quote character and inject a logical condition that forces the query to evaluate as true. 1. Probing the Target

marks a step up in difficulty from the previous challenges. While earlier challenges often rely on obvious error messages or simple authentication bypasses, Challenge 5 typically requires a deeper understanding of how data is retrieved and displayed to the user. This article breaks down the analysis, the theory, and the solution for this specific challenge.