Document Title:
===============
Phone Drive Eightythree 4.1.1 iOS - Multiple Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1168


Release Date:
=============
2013-12-11


Vulnerability Laboratory ID (VL-ID):
====================================
1168


Common Vulnerability Scoring System:
====================================
7.6


Product & Service Introduction:
===============================
Phone Drive allows you to store, view and manage files on your iPhone or iPad. You can connect to Phone Drive from any Mac or 
PC over the Wi-Fi network and transfer files by drag & drop files straight from the Finder or Windows Explorer. Phone Drive 
features document viewer, PDF reader, music player, image viewer, voice recorder, text editor, file manager and support most 
of the file operations: like delete, move, copy, email, share, zip, unzip and more.

(Copy of the Homepage: https://itunes.apple.com/de/app/phone-drive/id431033044 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple web vulnerabilities in the official Eigthythree Phone Drive v4.1.1 iOS mobile application.


Vulnerability Disclosure Timeline:
==================================
2013-12-11:    Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Eightythree Technologies
Product: Phone Drive - Mobile Application 4.1.1


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


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


Technical Details & Description:
================================
1.1
A local command/path injection web vulnerability has been discovered in the Eigthythree Phone Drive v4.1.1 mobile application for apple iOS.
The remote web vulnerability allows to inject local commands via vulnerable system values to compromise the apple iOS mobile web-application.

The vulnerability is located in the in the device name value of the index and sub category list module. Local attackers are 
able to inject own script codes as iOS device name. The execute of the injected script code occurs with persistent attack vector 
in the header section of the web interface. The security risk of the command/path inject vulnerabilities are estimated as high 
with a cvss (common vulnerability scoring system) count of 7.0(+)|(-)7.1.

Exploitation of the command/path inject vulnerability requires a local low privileged iOS device account with restricted access 
and no direct user interaction. Successful exploitation of the vulnerability results in unauthorized execute of system specific 
commands or unauthorized path requests.

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

Vulnerable Parameter(s):
        [+] devicename

Affected Module(s):
        [+] Index File Dir List - [Header]


1.2
A local file/path include web vulnerability has been discovered in the Eigthythree Phone Drive v4.1.1 mobile application for apple iOS.
The file include vulnerability allows remote attackers to include (upload) local file or path requests to compromise the web-application.

The remote file include web vulnerability is located in the vulnerable filename value of the file dir list index module (web interface). 
Remote attackers can manipulate the filename value in the POST method request of the file upload form to cpmpromise the mobile application.
Remote attackers are able to include own local files by usage of the file upload module. The attack vector is persistent and the request 
method is POST. The file include execute occcurs in the main file dir index list. The security risk of the local file include web 
vulnerability is estimated as high(+) with a cvss (common vulnerability scoring system) count of 8.8(+).

Exploitation of the local file include web vulnerability requires no user interaction or privileged web-application user account with password. 
Successful exploitation of the local web vulnerability results in application or device compromise by unauthorized local file include attacks.

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

Vulnerable Module(s):
        [+] File Upload

Vulnerable Parameter(s):
        [+] filename

Affected Module(s):
        [+] Index File Dir Listing (http://localhost:80)



1.3
An arbitrary file upload web vulnerability has been discovered in the Eigthythree Phone Drive v4.1.1 mobile application for apple iOS.
The arbitrary file upload issue allows remote attackers to upload files with multiple extensions to bypass the web-server or system validation.

The vulnerability is located in the upload file module. Remote attackers are able to upload a php or js web-shells by a rename of the file with 
multiple extensions to bypass the file restriction mechanism. The attacker uploads for example a web-shell with the following name and extension 
`image.jpg.gif.js.php.jpg`. After the upload the attacker needs to open the file in the web application. He deletes the .jpg & . gif file 
extension and can access the application with elevated access rights. The security risk of the arbitrary file upload web 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 privilege application user account with password.
Successful exploitation of the vulnerability results in unauthorized file access because of a compromise after the upload of web-shells.


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

Vulnerable Module(s):
        [+] File Upload

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

Affected Module(s):
        [+] Index File Dir Listing (http://localhost:80)


1.4
A persistent input validation web vulnerability has been discovered in the Eigthythree Phone Drive v4.1.1 mobile application for apple iOS.
The (persistent) vulnerability allows remote attacker to inject own malicious script code on the application-side of the mobile application.

The persistent input validation vulnerability is located in the foldername (path) value of the folder/path create web-application module.
Remote attackers can inject own malicious script codes as payload to the create folder (path) input field. After the client-side inject 
in the POSt method request the payload will be saved and the vector turns into a persistent attack. The persistent execute occurs in the 
file dir index- or sub category folder list (http://localhost:8080). Attacker can also inject the script code by the rename of an 
exsisting issue. The second execute occurs in the delete notification popup box of the item index list. The security risk of the persistent 
input validation web vulnerability is estimated as medium(+) with a cvss (common vulnerability scoring system) count of 3.9(+).

Exploitation of the persistent input validation web vulnerability requires no privileged mobile application user account but low or medium 
user interaction. Successful exploitation of the persistent vulnerability results in persistent session hijacking (customers) attacks, account 
steal via persistent web attacks, persistent phishing or persistent manipulation of vulnerable module context.

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

Vulnerable Input(s):
        [+] Create Folder

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

Affected Module(s):
        [+] Index File Dir Listing (http://localhost:80)


Proof of Concept (PoC):
=======================
1.1
The local command inject web vulnerability can be exploited by local attackers with physical restricted device access and without user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below.

PoC: DeviceName - Index File Dir List

<tr>
<td><a href="http://localhost:80/"><img src="Phone%20Drive%20-%20devicename_files/webicon.png" id="headerImg" height="57" width="57"></a></td>
<td><h2>device bkm>"<<>"<../[LOCAL COMMAND/PATH INJECT WEB VULNERABILITY!]"></h2></td>
<td width="170" align="center"><a 
href="http://www.eightythreetech.com" target="_blank"><img 
src="/webroot/moreapps.png"/></a></td>
</tr>
</table>



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

PoC: 
<tr class="c"><td class="e"><input name="selection" value="[LOCAL FILE INCLUDE VULNERABILITY!]" type="checkbox"></td>
<td class="i"><a href="Help.webarchive"><img src="/webroot/fileicons/webarchive.png" height="20" 
width="20"></a></td><td class="n"><a href="[LOCAL FILE INCLUDE VULNERABILITY!]">[LOCAL FILE INCLUDE VULNERABILITY!]</a></td><td class="m">
17.09.2015 18:07</td><td class="s">24.7 KB</td><td class="k">Safari Web Archive</td><td class="e">
<a href="#" title="Download file" onclick="downloadFile("[LOCAL FILE INCLUDE VULNERABILITY!]");">
<img src="/webroot/webdownload.png" height="15" width="15"></a></td><td class="e"><a href="#" 
title="Rename file" onclick="modalPopup("Help.webarchive", 0, 1);">
<img src="/webroot/webrename.png" height="15" width="15"></a></td><td class="e">
<a href="#" title="Delete file" onclick="modalPopup("Help.webarchive", 2, 1);">
<img src="/webroot/webdelete.png" height="15" width="15"></a></td></tr>



1.3
The arbitrary file upload and restricted upload bypass web vulnerability can be exploited by remote attackers without user interaction 
or privileged web-application user account. For security demonstration or to reproduce the vulnerability follow the provided information 
and steps below.


PoC Session Logs: qqfile

Status: 200 OK
POST http://localhost:80/qqfile=arbitrary-file-upload.png.txt.iso.js.html.php.jpg 
Load Flags[LOAD_BYPASS_CACHE  ] 
Content Size[unknown] Mime Type[unknown]
   
Request Headers:
Host[192.168.2.106]
User-Agent[Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[en-US,en;q=0.5]
Accept-Encoding[gzip, deflate]
DNT[1]
X-Requested-With[XMLHttpRequest]
X-File-Name[arbitrary-file-upload.png.txt.iso.js.html.php.jpg]
Content-Type[application/octet-stream]
Referer[http://192.168.2.106/]
Content-Length[98139]
Post Data:
POST_DATA[‰PNG



1.4
The persistent input validation web vulnerability can be exploited by remote attackers without privileged web application user account 
and low user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below.


PoC: Creat Folder - Index File Dir List & Sub Category List

<tr class="c"><td class="e"><input name="selection" 
value="%3E%22%3Cx%20src=a%3E" type="checkbox"></td><td class="i">
<a href="http://localhost/%3E%22%3Ciframe%20src=a%3E/"><img src="Phone%20Drive%20-%20pathname_files/folder.png" 
height="20" width="20"></a></td><td class="n"><a href="http://localhost/%3E%22%3Cx%3E/">
>"<[PERSISTENT INJECTED SCRIPT CODE!]"></a></td><td
class="m">11.12.2013 13:29</td><td


Solution - Fix & Patch:
=======================
1.1
The first vulnerability can be patched by a secure encode of the devicename value in the ehader section of the index module.

1.2 - 1.3
Restrict the filename input and parse the context with a filter mechanism. Disallow multiple file extensions and implement 
a own exception-handling to prevent arbitrary file uploads or restricted file uploads.


Security Risk:
==============
1.1
The security risk of the local command inject web vulnerability is estimated as high(-).

1.2 - 1.3
The security risk of the local file include web vulnerability via file and folder name value is estimated as high(+).


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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