In OWASP Security Shepherd, SQL Injection Challenge 5 (SQL Injection Five) involves exploiting an injection vulnerability in a "Search" or "Profile" feature where the application improperly filters input. Unlike earlier levels, this challenge often requires using a UNION-based attack or leveraging OR logic to bypass authentication or extract hidden data. Challenge Summary Vulnerability Type: SQL Injection (In-band/UNION-based).
Goal: Extract a hidden key (Flag) from the database or bypass a specific filter.
Target Input: A text field, typically for a "Guest Name" or "Employee Search." Technical Walkthrough 1. Identify the Entry Point Submit a single quote (') into the input field.
Expected Result: A database error or a change in the page's output confirms the parameter is vulnerable.
Observation: If the application returns "No results," the query may be breaking due to the unclosed quote. 2. Determine Column Count
To use a UNION SELECT statement, you must match the number of columns in the original query. Payload: ' ORDER BY 1--
Process: Increment the number (2, 3, etc.) until you get an error. If ORDER BY 3 works but ORDER BY 4 fails, there are 3 columns. 3. Extract the Flag
Use the UNION operator to join results from the database's metadata or hidden tables. Common Payload: ' UNION SELECT 1,2,key_data FROM flags--
Note: In Security Shepherd, the table names are often descriptive (e.g., users, employees, or flags).
Output: The "Flag" or "Result" should appear in one of the display fields on the webpage. Remediation Report Vulnerability Analysis
The application concatenates user input directly into the SQL query string. This allows an attacker to manipulate the query logic, leading to unauthorized data disclosure. Recommended Fixes
Prepared Statements: Use parameterized queries (prepared statements) to ensure user input is treated as data, not executable code.
Input Validation: Implement an allow-list for inputs to ensure only expected characters (e.g., alphanumeric) are processed.
Principle of Least Privilege: Ensure the database user account used by the web app has the minimum permissions necessary.
⚡ Key Defense: According to the OWASP Cheat Sheet, prepared statements are the primary defense against SQLi. sql+injection+challenge+5+security+shepherd+new
If you tell me the specific error message you see or the current output of your payload, I can help you refine the exact SQL syntax for this level.
What is SQL Injection (SQLi) and How to Prevent Attacks - Acunetix
Understanding and solving SQL Injection Challenge 5 in Security Shepherd requires a grasp of how to bypass basic filters and extract data from a backend database. This challenge typically focuses on demonstrating how developers try to sanitize inputs—and how those attempts can still be circumvented.
The core objective is to bypass a login or data retrieval form where standard single quotes might be escaped or certain keywords are blocked. By utilizing UNION-based SQL injection, you can force the application to display sensitive information, such as the administrator's password or a hidden flag. Understanding the Vulnerability
In Challenge 5, the application likely takes a user-provided string and inserts it directly into a SQL query. The developer has likely implemented a basic security measure, such as filtering for specific characters like ' (single quotes) or keywords like OR.
However, if the filter is not comprehensive, an attacker can use alternative syntax to achieve the same result. For example, if single quotes are blocked, you might use hexadecimal encoding or different query structures to keep the syntax valid while still injecting malicious commands. Step-by-Step Walkthrough
To solve this challenge, follow these logical steps to identify the number of columns and extract the data.
Test for Injection: Enter a simple character like a backslash \ or a single quote ' to see if the database returns an error.
Identify Column Count: Use the ORDER BY clause to find how many columns the original query is selecting. 1' ORDER BY 1-- 1' ORDER BY 2-- Keep increasing the number until you get an error.
Locate Display Columns: Use a UNION SELECT statement with dummy values to see which columns appear on the screen. Example: 1' UNION SELECT 1,2,3--
Extract Table Names: Query the information_schema.tables to find where the challenge data is stored.
Dump the Data: Once you have the table and column names, use a final UNION SELECT to pull the flag. Key Payload Examples
🚀 Bypassing Filters: If the application strips out the word OR or SELECT, try using different casing (e.g., sElEcT) or doubling the keyword (e.g., SELSELECTECT) if the filter only runs once. Standard Bypass: ' OR '1'='1 Union Discovery: -1' UNION SELECT 1,2,database(),4--
Hex Encoding: If quotes are blocked, use 0x61646d696e instead of 'admin'. Remediation and Best Practices In OWASP Security Shepherd, SQL Injection Challenge 5
To prevent these vulnerabilities in real-world applications, developers must move away from simple blacklisting or manual filtering.
Prepared Statements: Use parameterized queries so user input is never treated as executable code.
Input Validation: Enforce strict allow-lists for expected data types (e.g., ensuring an ID is always an integer).
Principle of Least Privilege: Ensure the database user account used by the web app has only the permissions it needs.
ORM Security: Use modern Object-Relational Mapping libraries that handle escaping automatically.
If you are looking for more specific help with your current progress: Which database error are you seeing? Are single quotes being stripped out? Do you have the table names yet?
SQL Injection Challenge 5 (often referred to as the "Meme Shop" or "Coupon Code" challenge) in OWASP Security Shepherd is a logic-based injection task that tests your ability to manipulate backend database queries through input fields. Challenge Overview
In this scenario, you are presented with a "Super Meme Shop" interface where you can "buy" items. The goal is to obtain a VIP Coupon Code
that allows you to complete a transaction for free (or for a "troll amount"), which then rewards you with the result key. 1. Identify the Vulnerable Input The vulnerability lies in the Coupon Code
input field. Unlike earlier challenges that might use simple login forms, this one requires you to extract data from a table you don't initially see. Course Hero 2. Construct the Payload The backend likely uses a query similar to:
SELECT coupon_code FROM coupons WHERE coupon_code = 'USER_INPUT'; Course Hero
To bypass the check and force the database to return a valid coupon code (even if you don't know it), you can use a classic tautology: Course Hero Resulting Query:
SELECT coupon_code FROM coupons WHERE coupon_code = "" OR 1=1;
is always true, the database will return the first available coupon code in the table. Course Hero 3. Exploit and Retrieve the Key Enter the payload into the Coupon Code box and click "Place Order". The application should reveal a VIP Coupon Code (e.g., a specific string like VIP-123-CODE Refresh the page or go back to the shop, enter the actual coupon code Common defenses and mitigations
you just discovered, and set a quantity for an item (some versions require a "Troll Amount" is greater than or equal to 1 Submit the order to receive your solution key. Key Takeaway
This challenge demonstrates that SQL injection isn't just about bypassing logins; it can be used to exfiltrate sensitive data
(like discount codes or internal IDs) that the application logic then trusts for further actions. ResearchGate ✅ Result The solution involves using a tautology payload like
in the coupon field to force the database to leak a valid VIP code, which is then used to "purchase" the result key for free. Are you having trouble with the mechanism in this specific level, or does the payload work for your version?
OWASP Security Shepherd SQL Injection Challenge 5 (often featuring the "Super Meme Shop"), the objective is to bypass coupon validation to purchase items for free and obtain the result key. Core Vulnerability & Strategy The challenge uses an input field for a Coupon Code . The backend likely executes a query similar to:
SELECT coupon_code FROM coupons WHERE coupon_code = '[USER_INPUT]'; Course Hero Since the goal is to make this query return
regardless of the actual coupon, you can use a classic tautology injection. Solution Steps Tautology Injection : Input a payload that always evaluates to true, such as: ' OR 1=1 -- " OR 1=1 -- : By using
, the logic becomes "where coupon code is [blank] OR where 1 equals 1." Since 1 always equals 1, the database validates the request as successful. Alternative (Client-Side Analysis)
: Some versions of this challenge involve a JavaScript file (e.g., couponCheck.js
) that uses DES/3DES encryption. In these cases, the "real" coupon code can be found by decrypting the values in the script using the provided keys and IVs found in the source code. Course Hero Automated Approach For more complex instances, you can use to automate the extraction: Capture the request in a proxy like Burp Suite Run sqlmap against the URL, targeting the couponCode parameter:
sqlmap -u "[CHALLENGE_URL]" --data="couponCode=test" --cookie="[YOUR_SESSION_COOKIE]" --dump Course Hero
Always ensure you are assigned to a "class" within Security Shepherd to see and submit the result keys correctly. path for this specific challenge? OWASP Security Shepherd Project - CSRF 1 (CSRF Challenge)
Here are a few options for a post about "SQL Injection Challenge 5" in Security Shepherd, tailored for different platforms like LinkedIn, a personal blog, or a cybersecurity forum.
Security Shepherd's SQL Injection Challenge 5 (the "new" variant) is a deliberately vulnerable web application module designed to teach advanced SQL injection techniques and defenses. The challenge typically involves exploiting blind and logical/boolean-based SQL injection, bypassing input filters, chaining multiple injections, and extracting data from multiple tables. This review covers objective goals, attack surface, exploitation steps, payloads, mitigation recommendations, and assessment of difficulty and learning value.
We need to query the metadata. In MySQL (common in Shepherd), this is information_schema.tables.
' UNION SELECT 1,table_name,3 FROM information_schema.tables--
Look through the output for a suspicious table name. It is often something obvious like keys, secrets, or challenge5_data.