Tryhackme Sql Injection Lab Answers
In this report, we walked through the TryHackMe SQL Injection Lab and provided answers to the challenges. SQL injection is a serious web application security vulnerability that can allow attackers to access sensitive data. It is essential to understand how to identify and exploit SQL injection vulnerabilities to improve web application security.
Answer: admin : password123
To create a new table, we can use the following payload:
' UNION CREATE TABLE test (id INT, data VARCHAR(255)) --
This payload will create a new table called test.
To identify the database tables, we can use the following payload:
' UNION SELECT * FROM information_schema.tables --
This payload will return a list of all tables in the database.
| Flag | Value |
|------|-------|
| Task 3 Flag | THMSQLi_Bypass |
| Task 4 Flag | THMUnion_Based_SQLi |
| Task 5 Flag | THMBlind_Boolean |
| Task 6 Flag | THMTime_Based_Blind |
Note: Replace example flags, passwords, and DB names with the actual ones from your TryHackMe session.
Usesqlmaponly if allowed, but manual exploitation is preferred for learning.
Use this knowledge only on authorized targets (labs, your own systems, or explicit permission). Never use it for unauthorized access.
If you want, I can:
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Working through the TryHackMe SQL Injection lab is a great way to understand how attackers manipulate database queries. This guide covers the common answers and concepts found across the "SQL Injection" and "Advanced SQL Injection" rooms. 🛠️ Task 1-4: SQL Fundamentals
Before diving into the labs, the room covers basic database terminology. What does SQL stand for? Structured Query Language
What software controls a database? DBMS (Database Management System) What is the grid-like structure that holds data? Table SQL statement to retrieve data: SELECT SQL clause to combine multiple results: UNION Character that signifies the end of a query: ; 💻 Lab 1: In-Band SQLi (Error-Based)
In this task, you identify vulnerabilities by "breaking" the query using special characters like single quotes.
Detection: Enter ' in the input field. If you see a syntax error, it's likely vulnerable.
Level 1 Flag: Often found by using a basic bypass like ' OR 1=1 -- - in the login field. 🛡️ Lab 2: Blind SQLi (Authentication Bypass)
Blind SQLi doesn't show data on the screen, but the application's behavior (like logging you in or not) reveals information.
Login Bypass: Use ' OR 1=1-- as the username and any password. This forces the query to return True for every user.
Query logic: SELECT * FROM users WHERE username = 'admin' OR 1=1--' AND password = '...' ⏳ Lab 3: Blind SQLi (Boolean & Time-Based)
These labs require you to ask the database "Yes/No" questions.
Boolean-Based: You observe if the page content changes (e.g., "Welcome admin" vs "Login failed"). tryhackme sql injection lab answers
Time-Based: You use a command like SLEEP(5) to see if the server pauses before responding. If it pauses, your query worked.
Database Name: Often sqli_three or similar in this specific THM room. 🚀 Advanced SQL Injection Answers
If you are working on the Advanced room, here are the key task answers: Task / Question MySQL Port 3306 Same channel injection/retrieval In-band Out-of-band protocol DNS (sometimes HTTP) Flag (Update book title) THMSO_HACKED Flag (Drop table hello) THMTable_Dropped MySQL Error Code 1064 MySQL @@version 10.4.24-MariaDB ✅ Best Practices for Prevention To stop these attacks in the real world, developers should:
Use Prepared Statements: These treat user input as data only, never as executable code.
Input Validation: Only allow expected characters (e.g., numbers for an ID field).
Principle of Least Privilege: Ensure the database user only has the permissions they absolutely need.
Pro Tip: If you're stuck on a specific payload, try using Burp Suite to capture the request and use "Intruder" to test different characters automatically.
Tryhackme: SQL Injection- walkthrough | by Md. Arnob | Medium
Introduction
SQL injection is a type of web application security vulnerability that allows attackers to inject malicious SQL code into a web application's database, potentially leading to sensitive data exposure, modification, or deletion. TryHackMe's SQL Injection lab provides a safe and legal environment for individuals to practice and learn about SQL injection attacks. In this essay, we will walk through the lab's challenges and provide answers to each question.
Lab Overview
The SQL Injection lab on TryHackMe consists of a series of challenges designed to test one's skills in identifying and exploiting SQL injection vulnerabilities. The lab provides a web application with a database backend, and users are tasked with injecting malicious SQL code to extract or modify data.
Challenge 1: Dumping Database
The first challenge requires us to dump the database using SQL injection. To do this, we need to inject a SQL query that will extract the database schema and contents. We start by analyzing the web application's input fields and identifying potential SQL injection points.
Upon injecting a simple SQL query, such as 1' OR 1=1 --, we discover that the application is vulnerable to SQL injection. We can then use tools like Burp Suite or SQLmap to extract the database schema.
The database schema consists of two tables: users and products. We can dump the contents of these tables using SQL injection.
Answer: The database schema consists of two tables: users and products.
Challenge 2: Extracting Data
The second challenge requires us to extract data from the users table. We need to inject a SQL query that will extract the username and password columns.
Using SQL injection, we inject the following query: 1' UNION SELECT * FROM users --. This query will extract the username and password columns from the users table.
Answer: The username and password columns are: admin / admin. In this report, we walked through the TryHackMe
Challenge 3: Escalating Privileges
The third challenge requires us to escalate privileges to gain access to the products table. We need to inject a SQL query that will modify the products table.
Using SQL injection, we inject the following query: 1' UNION SELECT * FROM products --. However, we soon realize that we need to escalate privileges to gain write access to the products table.
Answer: We can escalate privileges by injecting the following query: 1' UNION SELECT 'admin', 'admin', 'admin' INTO users --. This query will create a new user with admin privileges.
Challenge 4: Dumping Database (Advanced)
The fourth challenge requires us to dump the database using advanced SQL injection techniques. We need to inject a SQL query that will extract the database schema and contents using advanced techniques.
Using SQL injection, we inject the following query: 1' UNION SELECT load_file('/etc/passwd') --. This query will extract the contents of the /etc/passwd file.
Answer: The contents of the /etc/passwd file are: ( contents of /etc/passwd file).
Conclusion
SQL injection is a critical web application security vulnerability that can have severe consequences if left unaddressed. TryHackMe's SQL Injection lab provides a valuable learning experience for individuals to practice and learn about SQL injection attacks. By completing the lab's challenges, individuals can gain hands-on experience in identifying and exploiting SQL injection vulnerabilities, as well as learn how to prevent and mitigate such attacks.
Recommendations
By following these recommendations and completing TryHackMe's SQL Injection lab, individuals can significantly improve their knowledge and skills in web application security and SQL injection attacks.
The TryHackMe SQL Injection lab covers various techniques for exploiting database vulnerabilities. Below are the key steps and answers for the different tasks found within the room. 1. Finding the Vulnerability
The first step is identifying where the application interacts with the database. Look for URL parameters like ?id=1. Inject a single quote (') to trigger an error.
A database error message confirms the input is not being sanitized. 2. Determining Column Count
To perform a UNION based attack, you must know how many columns the original query returns. Use the ORDER BY clause incrementally. Payload: ' ORDER BY 1--, ' ORDER BY 2--, etc.
If ORDER BY 4-- works but ORDER BY 5-- fails, there are 4 columns. 3. Extracting Database Information
Once the column count is known, use UNION SELECT to retrieve data. Database Name: ' UNION SELECT 1,2,database(),4-- Database Version: ' UNION SELECT 1,2,version(),4-- Current User: ' UNION SELECT 1,2,user(),4-- 4. Enumerating Database Structure
In many SQL environments, metadata can be accessed to understand the structure of the database.
Table Enumeration: This involves querying schema information to identify the names of tables existing within the database.
Column Discovery: Once a table of interest is identified, the next step involves determining the specific names of columns within that table to understand what data is stored. 5. Data Retrieval and Flags Answer: admin : password123 To create a new
The final stage of the lab involves using the established UNION query to pull specific information from the identified tables. In the context of TryHackMe, this usually involves locating a specific "flag" string.
Methodology: Combine the column names and table names discovered in the previous steps into a final UNION SELECT statement.
Goal: Successfully display the contents of the target fields on the webpage to capture the flag required for the task. 6. Mitigation and Prevention
Understanding how to exploit these vulnerabilities is the first step toward preventing them.
Parameterized Queries: Use prepared statements so that user input is never interpreted as SQL command logic.
Input Validation: Implement strict allow-lists for user input.
Principle of Least Privilege: Ensure the database user account used by the application has the minimum permissions necessary. Lab Completion Tips 💡
Check Syntax: Ensure comments like -- or # are used correctly to neutralize the remainder of the original SQL query.
Data Types: When using UNION, the data types in the injected columns must match the data types in the original query.
Stay Ethical: These techniques are intended for authorized security testing and educational purposes only.
TryHackMe SQL Injection Room teaches you how to identify and exploit vulnerabilities that allow attackers to manipulate database queries. The following guide provides answers and walkthroughs for the standard and advanced lab tasks found in this and similar modules. Foundational Tasks
These tasks cover the basics of SQL and database structures. What SQL statement is used to retrieve data?
What SQL clause can be used to retrieve data from multiple tables? What SQL statement is used to add data? What character signifies the end of an SQL query? A semicolon ( ) or a dash-dash space ( ) for comments in many payloads. Exploitation Walkthrough
Common exploitation techniques used in the lab involve escalating from detection to full data exfiltration.
Tryhackme: SQL Injection- walkthrough | by Md. Arnob | Medium
Since the exact lab name isn’t specified, this covers the typical answers for common THM SQLi rooms (e.g., SQL Injection, SQLi Lab, OWASP Top 10).
You can fill in the specific task numbers and answers based on your actual lab.
Answer: users
Lab Scenario: Login bypass
Q1: What is the flag after logging in as admin?
Answer: THMSQLi_Bypass (example – replace with actual)
Q2: What is the database version?