Introduction
SQL Injection (SQLi) occurs when an attacker is able to inject malicious code into an SQL query in order to manipulate or access sensitive data from a database. This vulnerability arises when user input is not properly validated and sanitized before being used in an SQL query, allowing an attacker to inject arbitrary SQL code into the query.
For example, consider a web application that allows users to search for products by name. If the application constructs an SQL query based on the user’s search term without properly sanitizing the input, an attacker could modify the search term to include malicious SQL code that would be executed by the database. This could result in the attacker being able to access sensitive data, modify data, or execute other malicious actions.
SQL Injection is a common type of web application vulnerability and can have serious consequences, including data theft, unauthorized access, and damage to the target system. It’s important for developers to take proper precautions, such as input validation and sanitization, to prevent SQL Injection and protect sensitive data.
Tips
- Input validation: Ensure that all user inputs are properly validated and sanitized before being used in SQL queries.
- Error messages: Look for…
