SQL Injection Attacks
What Is SQL Injection?
SQL Injection is an attack where malicious SQL code is inserted into an application's input fields, tricking the underlying database into executing unintended commands.
How SQL Injection Works
When an application builds database queries by directly combining user input with SQL code, an attacker can craft input that changes the query's meaning - potentially bypassing login checks or extracting data it shouldn't return.
Potential Impact of SQL Injection
| Impact | Description |
|---|---|
| Data Theft | Extracting sensitive data like usernames and passwords |
| Authentication Bypass | Logging in without valid credentials |
| Data Manipulation | Modifying or deleting database records |
Preventing SQL Injection
The most effective defense is using parameterized queries (prepared statements) instead of directly concatenating user input into SQL commands, alongside proper input validation and least-privilege database accounts.
SQL Injection targets the database layer, while a closely related attack - Cross-Site Scripting - targets what runs in the user's browser.
Ready to master Cybersecurity Training Course?
Join Uncodemy's hands-on training and build real-world cybersecurity skills with expert mentors.