Notes 4.5 Arbitrary File Upload

`Document Title:  
===============  
Notes v4.5 iOS - Arbitrary File Upload Vulnerability  
  
  
References (Source):  
====================  
http://www.vulnerability-lab.com/get_content.php?id=1832  
  
  
Release Date:  
=============  
2016-04-25  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1832  
  
  
Common Vulnerability Scoring System:  
====================================  
6.4  
  
  
Product & Service Introduction:  
===============================  
xNotes, My Personal Documents, Diary.  
  
(Copy of the Homepage: http://appshopper.com/utilities/x-notes-my-personal-documents )  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered an arbitrary file upload vulnerability in the official Notes v4.5 iOS mobile web-application (wifi).  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2016-04-25: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Shanmin Xu  
Product: xNotes - Mobile API (Web-Application) 4.5  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
High  
  
  
Technical Details & Description:  
================================  
A arbitrary file upload web vulnerability has been discovered in the official Notes v4.5 iOS mobile web-application (wifi).  
The local file include web vulnerability allows remote attackers to unauthorized include local file/path requests via POST.  
  
The web vulnerability is located in the `filename` values of the `Upload File` module. Remote attackers are able to inject own   
files with malicious `filename` values in the `upload.action` POST method request to compromise the mobile web-application.   
The arbitrary file upload execute occcurs in the index file dir listing of the wifi interface. The attacker is able to inject   
the local file upload form request by usage of the `wifi interface` in connection with the vulnerable upload service module.  
  
The security risk of the vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.4.   
Exploitation of the arbitrary file upload vulnerability requires no user interaction or privileged web-application user account.   
Successful exploitation of the arbitrary file upload web vulnerability results in mobile web-application or device compromise.  
  
Request Method(s):  
[+] POST  
  
Vulnerable Module(s):  
[+] Upload  
  
Vulnerable Parameter(s):  
[+] filename  
  
Affected Module(s):  
[+] File Dir Index Listing  
  
  
Proof of Concept (PoC):  
=======================  
The file include web vulnerability can be exploited by remote attackers without privileged user account or user interaction.  
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.  
  
Manual steps to reproduce the vulnerability ...  
1. Install the vulnerable ios web-application to your ios device  
2. Start the application  
3. Open the file transfer button on the buttom left  
4. Open the called IP in a web-browser  
5. Surf to the Upload function and choose a random test image/picture  
6. Start a http session tamper to exploit the followup POSt method request  
7. Inject your local file request to the filename value for exploitation  
8. Continue the request  
9. The local file include issue executes in the filename value in the next step  
10. Successful reproduce of the local file include vulnerability!  
  
  
PoC: Exploitation  
http://localhost:51025/./[ARBITRARY FILE UPLOAD VULNERABILITY! PHP]/  
  
  
--- PoC Session Logs [POST] ---  
Status: 200[OK]  
POST http://localhost:51025/   
Request Header:  
Host[localhost:51025]  
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0]  
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:51025/]  
Connection[keep-alive]  
POST-Daten:  
POST_DATA[-----------------------------60382496219157  
Content-Disposition: form-data; name="file"; filename="./[ARBITRARY FILE UPLOAD VULNERABILITY! PHP]/"  
  
  
Security Risk:  
==============  
The security risk of the arbitrary file upload web vulnerability in the ios web-application is estimated as high. (CVSS 6.4)  
  
  
Credits & Authors:  
==================  
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected]) [www.vulnerability-lab.com] [http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.]  
  
  
Disclaimer & Information:  
=========================  
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