Sql+injection+challenge+5+security+shepherd+new !exclusive!
In the OWASP Security Shepherd SQL Injection Challenge 5, you are tasked with bypassing a "VIP Check" to obtain a hidden coupon code. This challenge typically features a shopping cart or "Super Meme Shop" interface where items like "Trolls" are prohibitively expensive. 🧩 The Challenge Scenario
You find yourself at a checkout screen where high-value items cost thousands of dollars. To pass the challenge, you must apply a VIP Coupon Code that you don't actually possess. The goal is to exploit a vulnerability in the "Coupon Code" input field to leak the legitimate code from the database. 🛡️ The Exploit Story
The application takes your input and places it directly into a SQL query without proper sanitization. The logic behind the scenes looks something like this:SELECT coupon_code FROM coupons WHERE coupon_code = 'USER_INPUT'; 1. Testing the Waters You start by entering a classic payload: ' OR '1'='1.
If the application is vulnerable, this breaks the original logic and forces the query to return a "True" result, often revealing that the field is indeed exploitable. 2. Extracting the Secret
To actually see the coupon, you might use a UNION SELECT attack to append results from the coupons table to the output you can see.
A successful payload might look like: ' UNION SELECT coupon_code FROM coupons WHERE '1'='1.
Once injected, the database may reveal the secret VIP code (common examples in Shepherd often include strings like VIP_COUPON_123 or similar unique keys). 3. Claiming the Prize
With the stolen coupon code in hand, you return to the shop and enter it into the legitimate coupon field.
If the "Troll" amount is greater than or equal to 1, the total cost drops to $0, and the application rewards you with the Result Key to submit to the scoreboard. 💡 Key Takeaways
The Vulnerability: The field fails to use Prepared Statements, allowing user input to change the query's intent.
The Fix: Developers should use parameterized queries where user input is treated strictly as data, never as executable code.
Learning Tip: If your payload produces an error, ensure there are no trailing spaces or hidden characters, as Security Shepherd challenges can be strict about exact string matching. If you'd like, I can help you: Step-by-step through a UNION select attack Understand why parameterized queries stop this Compare this to SQL Injection Challenge 6 SQL Injection Prevention - OWASP Cheat Sheet Series
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
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?
Unmasking the Coupon Code: A Deep Dive into OWASP Security Shepherd’s SQL Injection Challenge 5
In the realm of cybersecurity education, the OWASP Security Shepherd project stands as a cornerstone for hands-on learning, transforming abstract vulnerabilities into tangible puzzles. Among its tiered levels, SQL Injection Challenge 5 (often referred to as the "VIP Check" or "Coupon Code" challenge) represents a critical pivot point where basic logic meets more complex database structures. The Objective: Exploiting the "VIP" Shop
Unlike earlier lessons that might only require a simple ' OR '1'='1 to bypass a login, Challenge 5 immerses you in a mock e-commerce environment—a Super Meme Shop. The goal is simple yet daunting: purchase a high-value "key" without actually paying for it by uncovering a hidden VIP Coupon Code.
The application typically presents a field where users can search for or apply coupons. The underlying vulnerability lies in how this search query is constructed. If the application takes user input and directly concatenates it into a SQL statement, it opens a door for attackers to "inject" their own commands. The Attack Vector: Union-Based Injection
To solve Challenge 5, security researchers often employ a Union-Based SQL Injection. Since the standard search result displays coupon information, an attacker can use the UNION SELECT statement to append results from other tables—specifically internal database schema tables—to the visible output.
Determining Column Count: Attackers first use ORDER BY clauses to figure out how many columns the original query is returning.
Exploring the Schema: Once the column count is known, the information_schema.tables and information_schema.columns tables are queried to find where the "real" sensitive data is hidden. sql+injection+challenge+5+security+shepherd+new
Extracting the Coupon: By targeting a table often named something like coupons or vip_codes, the attacker forces the application to display the secret VIP code directly in the search results. Common Pitfalls and Technical Nuances
Students often encounter roadblocks in Challenge 5 due to its stricter validation compared to earlier levels: couponcode from challenges SQL injection 5 #323 - GitHub
The SQL Injection Challenge 5 in OWASP Security Shepherd is a "VIP Coupon Code" scenario where you must bypass a payment gate by injecting SQL into the coupon field to retrieve or validate a valid VIP code. 🎯 Objective Goal: Obtain a free "Troll" by applying a VIP coupon code.
Challenge: The application expects a valid coupon code to set the price to
. You must use SQL injection to trick the database into accepting an "always true" condition or revealing the valid code. 🛠️ Step-by-Step Walkthrough 1. Identify the Entry Point
Navigate to the "SQL Injection 5" challenge page. You will see a shopping interface for "Trolls" with a field for a Coupon Code. Entering a random string like TEST will result in an "Invalid Coupon" message. 2. Test for Vulnerability
Most Security Shepherd SQL challenges use double quotes (") or single quotes (') for string encapsulation. Try entering a single quote ' in the coupon field.
If the application returns a database error or behaves differently, it is likely vulnerable. 3. Craft the Bypass Payload
The goal is to make the WHERE clause of the underlying SQL query always return true. The suspected query looks like this:
SELECT coupon_code FROM coupons WHERE coupon_code = ′User_Input′SELECT coupon_code FROM coupons WHERE coupon_code = prime User_Input prime
To bypass this, use a classic OR tautology. The most common working payload for this specific challenge is: Payload: "" OR 1=1 (or '' OR 1=1) When injected, the query becomes:
SELECT * FROM coupons WHERE coupon_code = "" OR 1=1SELECT * FROM coupons WHERE coupon_code = "" OR 1=1 4. Execute and Retrieve Key Enter 1 (or any number ≥1is greater than or equal to 1 ) in the Quantity field for the Troll. Paste the payload "" OR 1=1 into the Coupon Code box. Click Place Order.
The system will validate the "always true" condition, apply a discount, and display the Result Key. 🛡️ Why This Works
The injection breaks out of the intended data field and appends a new logical condition (OR 1=1). Since 1=1 is always true, the database returns the first available coupon record (the VIP one) regardless of what you typed before the OR. ✅ Result
The result is the Result Key displayed on the "Order Confirmation" screen. Copy this key and submit it to the Security Shepherd scoreboard to complete the challenge.
If you'd like to dive deeper into the source code of this challenge or need help with the SQL Injection Escaping level (which often follows this one), let me know!
In Security Shepherd , SQL Injection Challenge 5 (VIP Coupon Check) requires you to bypass a coupon code validation field to find a specific hidden item or result key. The Vulnerability
The server uses a vulnerable SQL query to check if a coupon code exists. The backend code for this challenge (found on GitHub) reveals that user input is directly concatenated into a SELECT statement:
"SELECT itemId, perCentOff, itemName FROM vipCoupons JOIN items USING (itemId) WHERE couponCode = '" + couponCode + "';"
Because the input is not sanitized or parameterized, you can use UNION-based injection to retrieve data from other tables or force the query to return specific items. Challenge Steps
Identify the Input Field: You are presented with a "VIP Coupon Check" or "Super Meme Shop" page with a Coupon Code field.
Test for Injection: Enter a single quote (') to see if it triggers an error, confirming the vulnerability.
Find the Key: The goal is often to find a hidden item in the items table that contains the solution key. Since you already know the query structure from the source code, you can use a UNION to see what else is in the database:
Payload Example: ' UNION SELECT 1, 100, itemName FROM items; --
This tries to list all item names from the items table, potentially revealing the key.
Refined Search: If the simple UNION doesn't work, try to target the items table specifically to find names like "Key" or "Result":
' UNION SELECT 1, 100, itemName FROM items WHERE itemName LIKE '%Key%'; -- Key Takeaways
Vulnerability: Direct concatenation in SQL queries is highly insecure.
Remediation: The best defense is using Parameterized Queries (Prepared Statements), which treat user input strictly as data, not executable code.
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. In the OWASP Security Shepherd SQL Injection Challenge
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
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?
You're looking for information on SQL injection challenges, specifically Security Shepherd's SQL Injection Challenge 5. I'll provide a detailed response.
SQL Injection Challenge 5: Security Shepherd
Security Shepherd is an online platform that offers a series of challenges to help individuals learn about web application security, including SQL injection. Challenge 5 is a part of this series, focusing on SQL injection attacks.
Objective: The objective of Challenge 5 is to exploit a vulnerable web application by injecting malicious SQL code to extract or manipulate sensitive data.
Challenge Description: You are presented with a web application that allows users to search for employees by their IDs. The application uses a SQL database to store employee information. Your goal is to inject malicious SQL code to extract sensitive data, such as employee details or database structure.
Step-by-Step Solution:
- Understand the Vulnerability: The application is vulnerable to SQL injection attacks because it directly injects user input into SQL queries without proper sanitization or parameterization.
- Identify the Injection Point: The injection point is typically in the input field where you enter the employee ID.
- Determine the SQL Query: You need to determine the underlying SQL query being executed. This might involve using tools like Burp Suite or analyzing the web application's code (if available).
- Inject Malicious SQL: Once you have an understanding of the SQL query, you can start injecting malicious SQL code to manipulate the query. For example, you might use the following payloads:
' OR 1=1 --to extract all employees' UNION SELECT * FROM another_table --to extract data from another table
- Extract Sensitive Data: By injecting malicious SQL code, you can extract sensitive data, such as employee details or database structure.
Common SQL Injection Payloads:
' OR 1=1 --' UNION SELECT * FROM employees --'); DROP TABLE employees; --' OR IF(MID(VERSION(),1,1)='5',SLEEP(5),1) --
Tips and Best Practices:
- Use parameterized queries or prepared statements to prevent SQL injection attacks.
- Sanitize and validate user input to prevent malicious SQL code injection.
- Limit database privileges to prevent attackers from exploiting elevated privileges.
Resources:
- OWASP SQL Injection Cheat Sheet: A comprehensive guide to SQL injection attacks and prevention.
- Security Shepherd: A platform offering web application security challenges, including SQL injection challenges.
Mastering the SQL Injection Challenge 5 in OWASP Security Shepherd
The OWASP Security Shepherd project is a premier training platform designed to teach the fundamentals of web application security through hands-on, gamified challenges. Among these, the SQL Injection Challenge 5 stands out as a critical test of your ability to bypass standard escaping mechanisms and exploit flawed input sanitization. Understanding the Vulnerability
In this specific challenge, the application attempts to secure its database by "escaping" single quotes (
). When a developer tries to manually sanitize input by replacing every single quote with a backslash-escaped version (\'), they often create a new vulnerability. ' OR 1=1 -- to extract all employees
The core issue in Challenge 5 is how the escaping function handles backslashes:
The Escape Logic: The application replaces every single quote ( ) with (\'). The Flaw: If you provide a backslash (
'$), the application sees the single quote and escapes it, resulting in two backslashes followed by a single quote (
→́′4 lines; Line 1:; Line 2: modified right arrow with acute accent above; Line 3:; Line 4: prime end-lines;
The Result: The first backslash now escapes the second backslash, leaving the single quote unescaped and able to break out of the SQL string. Walkthrough: Solving SQL Injection 5
To solve this challenge, you must leverage the escaping flaw to manipulate the backend query.
Identify the Input Field: Most versions of this challenge feature a "Coupon Code" or "VIP Check" field.
Test for Escaping: If you enter a standard payload like ' OR 1=1; --, it will likely fail because the single quote is neutralized.
Execute the Bypass: Use a payload that exploits the backslash handling. Payload: \' OR 1=1; --
Alternative: In some environments, simply using "" OR 1=1 (double quotes) may bypass basic single-quote filters if the backend SQL engine allows them.
Analyze the Query Change: By using \', you effectively tell the database to treat the backslash as a literal character and the quote as a string terminator. The trailing OR 1=1; -- then makes the condition always true, returning all results—including the secret key needed to pass the level. Prevention and Best Practices
Manually escaping characters is a "blacklisting" approach that is highly prone to errors, as seen in this challenge. To prevent such vulnerabilities in real-world applications, follow these industry standards:
Use Prepared Statements: This is the most effective defense. By using parameterized queries, the SQL logic is pre-compiled, and user input is treated strictly as data, never as executable code.
Input Validation: Implement strict whitelisting to ensure input matches expected formats (e.g., alphanumeric only).
Principle of Least Privilege: Ensure the database user account used by the application has the minimum permissions necessary, limiting the damage an attacker can do if they succeed in an injection.
For more hands-on practice, you can explore the OWASP Security Shepherd GitHub repository to see the source code behind these vulnerabilities. SqlInjection5VipCheck.java - GitHub
8. Conclusion
SQL Injection Challenge 5 on Security Shepherd teaches a critical lesson: even when an application gives no visible output, no errors, and no timing differences, data can still be stolen via out-of-band channels like DNS. This technique is powerful in real-world pentests against MS SQL Server environments that permit external network calls.
Completing this challenge requires:
- Recognizing the need for OOB injection
- Setting up a DNS listener
- Crafting stacked SQL queries with
xp_dnsresolve - Iteratively extracting data via DNS logs
Final answer for the challenge: Submit the extracted secret key via the Shepherd web interface.
Phase 2: Determining the Injection Type
Challenge 5 usually requires a UNION-Based injection or a Blind injection, depending on how the backend handles errors.
Step 5: The Trick — Boolean Injection Without Quotes
Since LIKE patterns are inside single quotes in the SQL, but the single quote is filtered in input, how is the query built? Maybe the developer used double quotes for the SQL string? Let’s check the debug header again:
SELECT note FROM notes WHERE user_id = 2 AND note LIKE '%milk%'
So the outer SQL uses single quotes around the LIKE pattern. The input milk is placed inside those quotes. If you input a backslash (\), it escapes the closing quote in the SQL? Example:
Input: %\
SQL: LIKE '%\%' — the second single quote is escaped, causing a syntax error. The error message reveals the exact query:
LIKE '%\%'' — Yes, the last quote remains unmatched. So you can break out.
But how to get admin note? You need a union-based injection or boolean blind injection.
Try input: %\' UNION SELECT note FROM notes WHERE user_id=1 --
Filter blocks single quote. But what if you use double quotes? The filter allows double quotes? Let’s test: input " — validation passes. Double quotes are not in the blocked set. Interesting.
Automation for the "New" Challenge
Doing this manually takes hours. Use a Python script with requests and binary search logic:
import requestsurl = "http://localhost:8080/challenge5.jsp" flag = "" position = 1
while True: for ascii_val in range(32, 127): char = chr(ascii_val) # Blind boolean payload payload = f"1'//aNd//(SeLeCt//SuBsTrInG(flag,{position},1)//FrOm//users//LiMiT//0,1)//=/**/'{char}'-- -" params = {"userid": payload} resp = requests.get(url, params=params)
if "User Found" in resp.text: flag += char print(f"Found: {flag}") position += 1 break else: # No more characters found print(f"Final flag: {flag}") break
Overview
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.