SQL injection is a type of cyberattack that injects malicious SQL code into an application, allowing the attacker to view or modify a database. SQL injection manipulates Structured Query Language code to provide access to protected resources, such as sensitive data, or execute malicious SQL statements. Attackers can bypass security measures of applications and use SQL queries to modify, add, update, or delete records in a database. SQL injection attacks can be used to target any application that uses a SQL database, with websites being the most common prey.

SQL injection attacks can have severe consequences, such as exposing sensitive company data, compromising users privacy, and exposing intellectual property, customer data, or the administrative credentials of a private business. SQL injection vulnerabilities are one of the oldest and most widespread types of cyber assault.

To prevent SQL injection attacks, it is important to follow best practices and periodically test for vulnerabilities. Here are some prevention methods:

• Input validation: Validate user input by checking for expected data types, length, and format. This can prevent attackers from injecting malicious code into the application.

• Parameterized queries: Use parameterized queries or prepared statements to separate SQL code from user input. This can prevent attackers from modifying the SQL code.

• Least privilege: Limit the privileges of the database user account to only what is necessary to perform its functions. This can prevent attackers from accessing sensitive data or modifying the database structure.

• Error handling: Disable error messages after a website or application is live to prevent attackers from gaining information about the database structure.

• Web application firewall: Use a web application firewall to detect and block SQL injection attacks.

By understanding SQL injection and implementing prevention methods, organizations can better prepare for attacks and remedy vulnerabilities.