statement is always true, tricking the database into validating the login even with an empty or incorrect username. Level 3: Blind SQLi — Boolean-Based THMSQL_INJECTION_1093
This task demonstrates the core flaw: string concatenation in database queries. It shows how inputting a single quote ( ' ) can break the query syntax.
To bypass this check, you must input a value that forces the SQL statement to always evaluate to true, while ignoring the password check completely. admin' OR 1=1-- - Password Input: Leave blank or enter anything How It Works The query becomes:
Review the error message or application behavior to determine the database type (MySQL, PostgreSQL, MSSQL, or SQLite) and injection type. tryhackme sql injection lab answers
admin' AND SUBSTRING((SELECT password FROM users WHERE username='admin'), 1, 1) = 'a' -- Use code with caution.
Since the exact lab name isn’t specified, this covers the for common THM SQLi rooms (e.g., SQL Injection , SQLi Lab , OWASP Top 10 ).
The flag for this part is: .
tracking_id=xyz' AND substring((SELECT password FROM users WHERE username='admin'),1,1)='a'-- - Use code with caution.
Securing applications against SQL Injection requires separating user data from the execution code. 1. Use Prepared Statements (Parameterized Queries)
If the page output never changes regardless of input, use time delays to force a visible reaction. admin' AND IF(1=1, SLEEP(5), 0) -- Use code with caution. statement is always true, tricking the database into
Identify the table that likely holds sensitive information, such as users or flags . Step 5: Extract Column Names
Database name? Use time-based substring guessing → Answer: sqli_lab