'[FD] Wifi Drive Pro v1.2 iOS - File Include Web Vulnerability'

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List:       full-disclosure
Subject:    [FD] Wifi Drive Pro v1.2 iOS - File Include Web Vulnerability
From:       Vulnerability Lab <research () vulnerability-lab ! com>
Date:       2015-04-21 9:50:19
Message-ID: 55361D5B.5010502 () vulnerability-lab ! com
[Download RAW message or body]

Document Title:
===============
Wifi Drive Pro v1.2 iOS - File Include Web Vulnerability

References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1447

Release Date:
=============
2015-03-13

Vulnerability Laboratory ID (VL-ID):
====================================
1447

Common Vulnerability Scoring System:
====================================
6.3

Product & Service Introduction:
===============================
This app lets you use your iphone, iPad or iPod Touch as a wireless USB drive through which you \
can download, save and view documents and files. Using the app you can transfer files from your \
PC or Mac either wirelessly or through a USB port and carry your files wherever you go.

(Copy of the Vendor Homepage: https://itunes.apple.com/en/app/wifi-drive-pro/id579582610 )

Abstract Advisory Information:
==============================
The Vulnerability Laboratory Core Research Team discovered file include web vulnerability in \
the official Wifi Drive Pro v1.2 iOS mobile application.

Vulnerability Disclosure Timeline:
==================================
2015-03-13: Public Disclosure (Vulnerability Laboratory)

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

Affected Product(s):
====================
Mindspeak Software
Product: Wifi Drive Pro - iOS Mobile Web Application 1.2

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

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

Technical Details & Description:
================================
A local file include web vulnerability has been discovered in the official Mindspeak Software - \
Wifi Drive Pro v1.2 iOS mobile web-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 `file upload` module. Remote \
attackers are able to inject own files with malicious  `filename` values in the `file 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 file 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):
				[+] File Upload

Vulnerable Parameter(s):
				[+] filename

Affected Module(s):
				[+] Index File Dir Listing (http://localhost:49276/)

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: GET
http://localhost:49276//%3C./[LOCAL FILE INCLUDE VULNERABILITY!]%3E/2.png

PoC: Vulnerable Source
<p><a href="..">..</a><br>
<a href="68-2.png">68-2.png</a>		(    24.3 Kb, 2015-03-09 14:57:29 +0000)<br>
<a href="/%3C./[LOCAL FILE INCLUDE VULNERABILITY!]%3E/2.png"></%3C./[LOCAL FILE INCLUDE \
VULNERABILITY!]%3E/2.png</a>	(     0.5 Kb, 2015-03-09 14:57:48 +0000)<br /> </p><form action="" \
method="post" enctype="multipart/form-data" name="form1" id="form1"><label>upload file<input \
type="file" name="file" id="file" /></label> <label><input type="submit" name="button" \
id="button" value="Submit" /></label></form></body></html></iframe></a></p>

--- PoC Session Logs [POST] (Inject)---
Status: 200[OK]
POST http://localhost:49276/ 
Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] GrÃ¶ÃŸe des Inhalts[846] Mime \
Type[application/x-unknown-content-type]  Request Header:
      Host[localhost:49276]
      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:49276/]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------28140821932238
Content-Disposition: form-data; name="file"; filename="%3C./[LOCAL FILE INCLUDE \
                VULNERABILITY!]%3E/2.png"
Content-Type: image/png

Reference(s):
http://localhost:49276/
http://localhost:49276//%3C./

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 6.3)

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

Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. \
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exclusion or limitation of liability for  consequential or incidental damages so the foregoing \
limitation may not apply. We do not approve or encourage anybody to break any vendor licenses,  \
policies, deface websites, hack into databases or trade with fraud/stolen material.

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