Web Pentesting Manual SQL Injection Part 1

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Web Pentesting Manual SQL Injection Part 1

SQL injection is a type of web vulnerability that allows an attacker to inject malicious SQL code into a web application's database. This can lead to unauthorized access to sensitive information or even the ability to manipulate data within the database.

Here's a step-by-step guide on how to perform a manual SQL injection:

1. Identify the target: The first step in performing a SQL injection attack is to identify the target website or web application that you want to test.

2. Identify the vulnerable parameter: Once you have identified the target website or web application, you need to identify which parameter is vulnerable to SQL injection. The easiest way to do this is to look for input fields on the website, such as login forms or search boxes.

3. Test for SQL injection: Once you have identified the vulnerable parameter, you can start testing for SQL injection. The easiest way to do this is to enter a single quote (') or double quote (") into the input field and see if an error message is returned. If an error message is returned, it's likely that the parameter is vulnerable to SQL injection.

4. Determine the database type: Before you can proceed with the SQL injection attack, you need to determine the type of database that is being used by the website or web application. This information can be obtained by looking at the error messages that are returned when you enter a single quote or double quote into the input field.

5. Enumerate the database: Once you have determined the type of database that is being used, you can start enumerating the database to gather information about its structure and contents. This can be done by using SQL queries to extract information from the database.

6. Exploit the vulnerability: Once you have enumerated the database and gathered the information that you need, you can start exploiting the vulnerability. This can be done by injecting SQL code into the input field to modify or extract data from the database.

7. Cover your tracks: Finally, it's important to cover your tracks to avoid detection. This can be done by deleting any logs or evidence that may be left behind, such as web server logs or database logs.

It's important to note that performing a SQL injection attack on a website or web application without the owner's permission is illegal and can result in severe legal consequences. Therefore, it's important to only perform SQL injection attacks on websites or web applications that you have been authorized to test.