SQL injection is a security vulnerability that allows an attacker to gain unauthorized access to a website with all its sensitive information of the database by inputting malicious SQL code. With this hacking method, a hacker gets allowed to interfere with all the valid credentials including username, password, credit card number and so more.
How is an SQL attack performed?
SQL stands for Structured Query Language that is used to communicate with a database by using its vulnerable points illegally which empowers the attacker to modify or delete any data or make a change to it. So, it’s clear that an attacker firstly finds out about your web application or web page vulnerabilities.
We have to learn this hacking method of how it is performed that will help to find out your security vulnerabilities.
Hackers use manual techniques based on their good knowledge of SQL.
There are some automated tools such as SQLSmack, SQLPing 2, SQLMap attackers usually use to perform this injection attack more efficiently. Almost all the SQL based databases such as MS SQL Server, DB2, Oracle, PostgreSQL, MySQL, and so more are potentially vulnerable and supported for the attacks.
Dorks are used to marking the weak points of the desired website. inurl /.php *id=, inurl:games.php?id=, inurl:article.php?id= and so many dorks are there to do this malicious execution just by placing them before the selected web address.
How to prevent?
The reasons behind application vulnerabilities are improper filtering and lack of valid user input. So to prevent SQL attacks, it needs to have proper filtering system and valid user input and to check out all potentially vulnerable points.
The following measures can be taken to be protected from the SQL Injection attacks:
Regular Expression – this helps to detect the potential harmful codes and dismiss them before executing in the database.
User input validation – Valid user input by checking type, size, length, format, and range. Always Avoid the accesses containing binary data, escape sequences, etc that will help to prevent script injection.
Updating system – It needs to update your system to the most up-to-date version as you can, especially for the SQL server.
Hiding info from error reporting- There are some database error reporting that provide valuable information to the attackers such as table name, file name, etc. configure the system correctly to not to expose the information to an unauthorized user.
Along with all these ways of preventing the SQL Injection attacks, there are many measures can be taken. It’s very important to be prepared for an upcoming attack as you don’t know what is going to happen or when an attacker will appear. The main thing is to validate and sanitize all user interactions in order to prevent bad entries to the database. Hackers actually perform this attack by Identify injectable parameters to interact, insert, modify or delete data, to do Denial of Service to legal users by locking or deleting tables and so more.
No user will want to be the victim of these malicious activities. So, a web hosting service provider should keep its customers protected from these. After all, by applying some hacking prevention methods, it can be possible to keep the database safe from the SQL Injection attacks.