SQLinjektsiooni

SQLinjektsiooni, or SQL injection, is a code injection technique used to attack data-driven applications. It occurs when an attacker inserts malicious SQL statements into an entry field for execution. For example, a user might enter a username or password, and if the application does not properly sanitize the input, the attacker's malicious SQL code can be executed on the database.

This vulnerability can allow attackers to bypass authentication, access sensitive data, modify or delete data, and even execute administrative operations on the database. The impact of a successful SQL injection attack can range from data breaches and financial loss to complete system compromise.

Preventing SQL injection involves several measures, primarily focusing on input validation and parameterized queries. Input validation ensures that user-provided data conforms to expected formats and types, rejecting any input that appears suspicious. Parameterized queries, also known as prepared statements, treat user input as data rather than executable code, preventing it from being misinterpreted as part of a SQL command. Regular security audits and updates to database systems and applications are also crucial in mitigating this risk.