SQL Injection SQL injection is a web attack technique where an attacker injects malicious SQL code into a website's form or URL. This code can be used to ga...
SQL Injection
SQL injection is a web attack technique where an attacker injects malicious SQL code into a website's form or URL. This code can be used to gain unauthorized access to the website's database or even steal sensitive information.
How SQL Injection Works:
An attacker sends specially crafted SQL code to a website through a form or URL.
This code usually contains an embedded quotation mark, which is a special character that can be used in SQL queries.
When the website executes the SQL code, it interprets it as a valid query.
The attacker's malicious SQL code is executed on the database server.
This code can have various effects depending on its purpose, such as:
Accessing sensitive data
Modifying database records
Deleting data
Taking complete control of the website
Examples:
Attackers can use SQL injection to access sensitive user data from an online store's database, such as credit card numbers and passwords.
They can also use SQL injection to delete sensitive information from a company's database, such as customer records and financial statements.
Prevention of SQL Injection:
Use parameterized queries whenever possible.
Validate user input before it is used in an SQL query.
Sanitize user input to remove any malicious characters.
Use a web application firewall (WAF) to detect and block SQL injection attacks.
Keep your software and patches up to date