Lazybone Studios WiFi Music 1.0 iOS - Multiple Vulnerabilities

[Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>]

Document Title:
===============
Lazybone Studios WiFi Music 1.0 iOS - Multiple Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1233


Release Date:
=============
2014-03-21


Vulnerability Laboratory ID (VL-ID):
====================================
1233


Common Vulnerability Scoring System:
====================================
7.1


Product & Service Introduction:
===============================
WiFi Music lets you transfer via Wi-Fi the songs you have in your computer to 
any iPhone, iPod touch or iPad 
in your network. No iTunes required. Now you can share them with your friends 
and workmates, and stream them 
directly to almost any media player!

( Copy to the Vendor Homepage:  
https://itunes.apple.com/de/app/wifi-music/id469617062 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple critical 
vulnerabilities in the official Lazybone Studios WiFi Music v1.0 iOS mobile 
web-application.


Vulnerability Disclosure Timeline:
==================================
2014-03-21:     Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================

Exploitation Technique:
=======================
Local


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


Technical Details & Description:
================================
1.1
A local file include web vulnerability has been discovered in the official 
Lazybone Studios WiFi Music v1.0 iOS mobile web-application.
A file include web vulnerability allows remote attackers to unauthorized 
include local file/path requests or system specific path commands 
to compromise the web-application or mobile device.

The web vulnerability is located in the `filename` value of the `Upload File` 
module. Remote attackers are able to inject own files with 
malicious `filename` value in the upload POST method request to compromise the 
mobile web-application. The attack vector is persistent and 
the request method is POST. The local file/path include execution occcurs in 
the main music file dir list. The security risk of the local 
file include web vulnerability is estimated as high(+) with a cvss (common 
vulnerability scoring system) count of 6.7(+)|(-)6.8.

Exploitation of the local file include web vulnerability requires no user 
interaction but a privileged web-application user account with 
low user auth. Successful exploitation of the local file include web 
vulnerability results in mobile application or connected device 
component compromise.

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

Vulnerable Module(s):
                                [+] Select File > Upload

Vulnerable Parameter(s):
                                [+] filename

Affected Module(s):
                                [+] Music File Dir List (http://localhost:8080/)



1.2
An arbitrary file upload web vulnerability has been discovered in the official 
Lazybone Studios WiFi Music v1.0 iOS mobile web-application.
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` (video and music) module. Remote 
attackers are able to upload a php or js web-shells by renaming 
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 `ptest.mp3.html.php.js.aspx.mp3`. After the upload the attacker 
needs to open the file with the path value in the web application. 
He deletes the .mp3 file extension and can access the application with elevated 
executable 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 7.7(+)|(-)7.8.

Exploitation of the arbitrary file upload web vulnerability requires no user 
interaction or privileged 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):
                                [+] Select File > Upload

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

Affected Module(s):
                                [+] Music File Dir List (http://localhost:8080/)


Proof of Concept (PoC):
=======================
1.1
The local file include web vulnerability can be exploited by local attackers 
without user interaction or privileged application user account.
For security demonstration or to reproduce the vulnerability follow the 
provided information and steps below to continue.

PoC: iChm File Management - Index

<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/%3C[LOCAL FILE INCLUDE VULNERABILITY!]%3E" 
class="file"><./[LOCAL FILE INCLUDE VULNERABILITY!]"></a></td>
<td class='del'><form action='/files/%3C[LOCAL FILE INCLUDE VULNERABILITY!]%3E' 
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>


Source: Vulnerable Java Script (iChm File Management - Index)

<script type="text/javascript" charset="utf-8">
                var now = new Date();
                $.getJSON("/files?"+ now.toString(),
                function(data){
                  var shadow = false;
                  $.each(data, function(i,item){
                    var trclass='';
                    if (shadow)
                      trclass= " class='shadow'";
                        encodeName = encodeURI(item.name).replace("'", "'");
$("<tr" + trclass + "><td><a href='/files/" + encodeName + "' class='file'>" + 
item.name + "</a></td>" + "<td class='del'>
<form action='/files/" + encodeName + "' method='post'><input name='_method' 
value='delete' type='hidden'/><input name=\"commit\" 
type=\"submit\" value=\"Delete\" class='button' /></td>" + 
"</tr>").appendTo("#filelist");
                    shadow = !shadow;
                  });
                });
                </script>


--- PoC Session Logs [POST] ---
Status: 302[Found] 
POST http://localhost:8080/files Load Flags[LOAD_DOCUMENT_URI  
LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[67] Mime Type[text/html]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 
Firefox/27.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de-de,de;q=0.8,en-us;q=0.5,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:8080/]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------280732177711982
Content-Disposition: form-data; name="newfile"; filename="<./[LOCAL FILE 
INCLUDE WEB VULNERABILITY!]>"
Content-Type: image/png

Reference(s):
http://localhost:8080/[Index File Dir Listing]



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

PoC: http://localhost:8080/files/[ARBITRARY FILE UPLOAD 
PATH]-ptest.mp3.html.php.js.aspx.mp3`

--- PoC Session Logs [POST] ---
Status: 302[Found]
POST http://localhost:8080/files Load Flags[LOAD_DOCUMENT_URI  
LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[67] Mime Type[text/html]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 
Firefox/27.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de-de,de;q=0.8,en-us;q=0.5,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:8080/]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------141831923231387
Content-Disposition: form-data; name="newfile"; 
filename="ptest.mp3.html.php.js.aspx.mp3"
Content-Type: image/jpeg

Reference(s):
http://localhost:8080/files


Solution - Fix & Patch:
=======================
1.1
The local file include web vulnerability can be patched by a secure parse and 
encode of the vulnerable filename value in the upload file POST method request.
Filter and encode also the filename output listing of the index.

1.2
Filter and restrict the file name validation on uploads to prevent arbitrary 
file upload attacks.
Implement a secure own exception-handling to restrict and disallow files with 
multiple extensions.
Reset the executable rights for html and php codes in the little web-server 
settings config for /files.


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

1.2
The security risk of the arbitrary file upload web vulnerability is estimated 
as high(+).


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri 
(bkm@xxxxxxxxxxxxxxxxx) [www.vulnerability-lab.com]


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