SQL injection

SQL Injection is an infiltration technique used to attack a database by injecting malicious code. It is one of the most dangerous and common attack methods used by malicious attackers. The technique takes advantage of the need for user input in web applications, allowing attackers to inject malicious code into the database.

SQL injection is a type of injection attack, where malicious SQL code is inserted into an entry field for execution. The malicious SQL code can then be used to gain access to confidential data, alter data, or even execute a denial-of-service attack.

An example of a SQL injection attack would be when an attacker enters an SQL command into a web form, such as a login form, instead of entering the correct credentials. If the input is not validated to ensure it is what the application expects, the command will be executed, allowing the attacker to gain access to sensitive information stored in the database.

The best way to prevent SQL injection attacks is to carefully validate user input before allowing it to be used in an application. This can be done through the use of filters, input masking, escaping of special characters, and ensuring that all fields are of the correct type (for example, only allowing numbers in a numerical field).

SQL injection is one of the most serious security threats to web applications and databases, and can have a detrimental effect on the data and systems of an organisation. It is essential for developers to ensure that their applications are properly secured against this kind of attack.