ThumbDrive v1.1 (USB) iOS - Multiple Web Vulnerabilities

2016-02-04T00:00:00
ID VULNERLAB:1707
Type vulnerlab
Reporter Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com]
Modified 2016-02-04T00:00:00

Description

                                        
                                            Document Title:
===============
ThumbDrive v1.1 (USB) iOS - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1707


Release Date:
=============
2016-02-04


Vulnerability Laboratory ID (VL-ID):
====================================
1707


Common Vulnerability Scoring System:
====================================
6.6


Product & Service Introduction:
===============================
Turn your iPhone/iPod touch/iPad into a thumb drive using this app. Simply type the IP address generated from this app on your favorite browser and 
start downloading and uploading your files. Carry around your files with you and share them with your friends and family.

(Copy of the Homepage: https://itunes.apple.com/us/app/thumbdrive-portable-storage/id374200932 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Core Research Team discovered multiple vulnerabilities in the official ThumbDrive v1.1 iOS mobile web-application.


Vulnerability Disclosure Timeline:
==================================
2016-02-04: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Changsoo Im
Product: ThumbDrive - iOS Wifi (Web-Application) 1.1

Keke Cai
Product: Mobile Drive Free - iOS Wifi (Web-Application) 1.8


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


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


Technical Details & Description:
================================
1.1
An arbitrary file upload web vulnerability has been discovered in the official ThumbDrive v1.1 iOS mobile web-application.
The arbitrary file upload 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 arbitrary file upload execute occcurs in the index file dir listing and sub folders of the wifi interface. The attacker 
is able to inject the payloads by usage of the wifi interface or local file sync function.

The security risk of the arbitrary file upload vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.6. 
Exploitation of the arbitrary file upload web vulnerability requires no user interaction or privileged 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 File

Vulnerable Parameter(s):
				[+] filename

Affected Module(s):
				[+] Index File Dir Listing (http://localhost:49549/)




1.2
An unrestricted file upload web vulnerability has been discovered  in the official ThumbDrive v1.1 iOS mobile web-application.
The unrestricted file upload issue allows remote attackers to upload files with multiple extensions to bypass the system validation and compromise the web-server.

The vulnerability is located in the filename value of the `upload` file module. Remote attackers are able to upload a php or js web-shell by a rename of the 
filename with multiple extensions in the upload POST method request. The attacker uploads for example a web-shell with the following name and extension 
`pentest.png.html.php.js.aspx.html.png`. After the upload the attacker needs to open the file in the wifi web-application interface. He deletes the .png file 
extension and can access the webshell with elevated access rights to execute. 

The security risk of the unrestricted file upload web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.2.
Exploitation of the unrestricted file upload web vulnerability requires no user interaction or privileged web-application user account with password.
Successful exploitation of the unrestricted file upload vulnerability results in unauthorized file access (aap/device) and compromise of http web-server.

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

Vulnerable Module(s):
				[+] Upload File

Vulnerable Parameter(s):
				[+] filename  (multiple extensions)

Affected Module(s):
				[+] Index File Dir Listing (http://localhost:49549/)


Proof of Concept (PoC):
=======================
1.1
The local file include web vulnerability can be exploited by remote attackers without privileged application user account or user interaction.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.

PoC: Exploitation
http://localhost:49549/./[ARBITRARY FILE UPLOAD VULNERABILITY!]


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:49549/
   Request Header:
      Host[localhost:49549]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0]
      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]
      DNT[1]
      Referer[http://localhost:49549/]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------237641219424375
Content-Disposition: form-data; name="file"; filename="./[ARBITRARY FILE UPLOAD VULNERABILITY!]"


Vulnerable Source: Index File Dir Listing
<p><br><a href="2">2</a>		(     0.5 Kb, 2016-02-03 14:11:40 +0000)<br>
<a href="2.png">2.png</a>		(     0.5 Kb, 2016-02-03 14:11:07 +0000)<br>
<a href="68-2.png">68-2.png</a>		(    24.3 Kb, 2016-02-03 14:11:12 +0000)<br>
<a href="<./[ARBITRARY FILE UPLOAD VULNERABILITY!]>2.png"><./[ARBITRARY FILE UPLOAD VULNERABILITY!]>2.png</a>(0.5 Kb, 2016-02-03 14:11:56 +0000)<br />
</body></html></iframe></a></p>



1.2
The unrestricted file upload web vulnerability can be exploited by remote attackers without privileged web-application user account or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.


PoC: Exploitation
http://localhost:49549/[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:49549/
   Request Header:
      Host[localhost:49549]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0]
      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]
      DNT[1]
      Referer[http://localhost:49549/]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------304511368424425
Content-Disposition: form-data; name="file"; filename="[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php.js.html.png"


Vulnerable Source: Index File Dir Listing
<p><br><a href="2">2</a>		(     0.5 Kb, 2016-02-03 14:11:40 +0000)<br>
<a href="2.png">2.png</a>		(     0.5 Kb, 2016-02-03 14:11:07 +0000)<br>
<a href="68-2.png">68-2.png</a>		(    24.3 Kb, 2016-02-03 14:11:12 +0000)<br>
<a href="[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php.js.html.png
"><[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php.js.html.png</a>(0.5 Kb, 2016-02-03 14:11:56 +0000)<br />
</body></html></iframe></a></p>


Solution - Fix & Patch:
=======================
1.1
The arbitrary file upload vulnerability can be patched by a secure parse and encode of the vulnerable `filename` value in the upload POST method request.
Restrict the filename input and filter with an own set exception to prevent application-side attacks.
Parse also in the Index of Documents the vulnerable name output value to solve the issue.

1.2
Restrict the vulnerable `filename` value and implement a secure filter mechanism with own exception to prevent the upload of files with multiple extensions.
Restrict the upload folder and disallow the execution of files that are already uploaded.


Security Risk:
==============
1.1
The security risk of the arbitrary file upload web vulnerability in the filename value of the upload file function is estimated as high. (CVSS 6.6)

1.2
The security risk of the unrestricted file upload web vulnerability in the file upload mechanism is estimated as high. (CVSS 6.2)


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. Vulnerability Lab disclaims all warranties, either expressed 
or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable 
in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab 
or its suppliers have been advised of the possibility of such damages. Some states do not allow the 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.

Domains:    www.vulnerability-lab.com   	- www.vuln-lab.com			       		- www.evolution-sec.com
Contact:    admin@vulnerability-lab.com 	- research@vulnerability-lab.com 	       		- admin@evolution-sec.com
Section:    magazine.vulnerability-db.com	- vulnerability-lab.com/contact.php		       	- evolution-sec.com/contact
Social:	    twitter.com/#!/vuln_lab 		- facebook.com/VulnerabilityLab 	       		- youtube.com/user/vulnerability0lab
Feeds:	    vulnerability-lab.com/rss/rss.php	- vulnerability-lab.com/rss/rss_upcoming.php   		- vulnerability-lab.com/rss/rss_news.php
Programs:   vulnerability-lab.com/submit.php  	- vulnerability-lab.com/list-of-bug-bounty-programs.php	- vulnerability-lab.com/register/

Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. Permission to 
electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by 
Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website 
is trademark of vulnerability-lab team & the specific authors or managers. To record, list (feed), modify, use or edit our material contact 
(admin@vulnerability-lab.com or research@vulnerability-lab.com) to get a permission.

				Copyright © 2016 | Vulnerability Laboratory - [Evolution Security GmbH]™