In this article, we are telling you about Missing Functional Level Access Control, what is Missing Functional Level Access Control vulnerability, how are hackers taking advantage of this bug.
You may have never heard of Missing Functional Level Access Control because mostly you are told about some basic vulnerbiliies like CSRF attack, SQL injection attack and Cross Site scripting attack.
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There is not much talk about bugs like Missing Functional Level Access Control or Server side template injection, in such a way there is very little knowledge about such bugs but for bug bounty you will know about more bugs.
Note – This article is only for educational purpose. Don’t miss use your knowledge and skills.
What is Missing Functional Level Access Control ?
Before going about the Missing Functional Level Access Control practically, you should know what it is and should also know what damage can happen to a website due to this bug.
Let’s try to understand this with an example as we look at products in ecommerce websites where we get the option of buy now and add to cart, in such case buy now and add to cart is an action which is defined it happens.
Just like we see the option to edit or update in our account in websites like facebook, that is also an edit and update action action, due to which your account is updated.
In such a case, if a hacker gets access to such edit and delete or any kind of function, in such a way he can edit and update the account of anyone very easily, in this way work Missing Functional Level Access Control.
Missing Functional Level Access Control bug remains in a website due to the mistakes of the web developer, it is because a web developer has publicly allowed such actions in the website.
When you do the practical of Missing Functional Level Access Control, in such a way you understand its working itself, here we are telling you by doing its practical in Xtreme Vulnerable Web Application.
Missing Functional Level Access Control or Server side template injection vulnerability is considered in the top 10 vulnerabilities of Owasp so you must know about them.
Working of Missing Functional Level Access Control ?
Let us now understand the working of this bug, here we are using XVWA, if you want, you can also understand it practically by using XVWA, this work can also be done with the help of burp suite.
As you have been told, this bug works when any kind of actions are publicly allowed by mistake, in such a way you can understand yourself how much damage can be done to a website in this way.
As you can see in the image, here you have some items show, here when you click on the view, in such a way, the delete button is also shown in front of you, in this way hackers get this bug and they miss use its.
Here if there is no kind of button show in front of you, in such a way any action can be performed through the url as well, as you can see in the image, the action show of the view is happening in this way in front of you.
In this way, you can see that the item gets deleted after executing the delete action only through the url, in this way, Missing Functional Level Access Control vulnerability works.
Missing Functional Level Access Control bug can also be found with the help of such burp suite. It is not that there are only two types of actions. There are many types of actions like submit, update, edit etc.
Here we want to make you clear one thing, this bug is not used just to delete items or perform some kind of action, here hackers also use this attack to access control.
How it is done here cannot be told to you because there are some limitations due to which you cannot be told about it but you can do more in-depth research about it.
Let us try to understand this by example, like by finding the admin pages of bruteforce attack, hackers can perform such actions from that also there is no need of any login access to do this.
But this attack cannot be performed until you get the vulnerability of Missing Functional Level Access Control in a website, so you must use the burp suite.
The Conclusion
I hope now you can understand about Missing Functional Level Access Control, here we have given a practical demo about Missing Functional Level Access Control.
If you have come to know about Missing Functional Level Access Control, then you yourself must have understood how and how much hackers use this bug wrongly, so you are given more reward for finding bug.
Because the creator of websites knows that if this bug is used incorrectly, in that case, that website can cause a lot of damage, so it is said that you can earn a lot from bug bounty.
By the way, all the big companies have big hackers who keep their websites secure, but as we know that everyone’s knowledge is different, in such a way we cannot think what you can think and we can think what you Can’t think.
That’s why hackers are rewarded for finding a bug, but to bounty the bug, you have to think out of the way, so you have to have a lot of deeply knowledge.
If you have any question related to Missing Functional Level Access Control or any kind of question, in such a way, you can ask in the comments, we will help you completely, I hope you will not use it wrongly.
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