Chapter-23, LEC-6 |

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SQL injection (SQLi) is a type of security vulnerability that occurs when an attacker inserts malicious SQL code into a website or application's input fields, which then gets executed by the application's backend database. The GET method is one way that attackers can exploit SQLi vulnerabilities.

The GET method is a type of HTTP request that is used to retrieve information from a server. It is commonly used in web applications to request data from a database. In a typical GET request, the data is included in the URL as query parameters.

In SQLi attacks using the GET method, the attacker manipulates the query parameters in the URL to inject malicious SQL code into the application's backend database. For example, the attacker may add a single-quote character (') to the end of a parameter value, which can cause the SQL query to be terminated prematurely, allowing the attacker to inject their own SQL code.

Once the attacker has successfully injected malicious SQL code into the application's backend database, they can perform a variety of actions, such as stealing sensitive information, modifying or deleting data, or even taking control of the entire application.

To prevent SQLi attacks using the GET method, it is important to use input validation and parameterized queries in your code. Input validation checks that the data submitted by the user is in the expected format and range, while parameterized queries ensure that user input is treated as data rather than executable code. Additionally, implementing security measures such as firewalls and intrusion detection systems can help prevent SQLi attacks from occurring in the first place.