Document Title:
===============
vPhoto-Album v4.2 iOS - File Upload Web Vulnerability


Date:
=====
2015-05-04


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=1477


VL-ID:
=====
1477


Common Vulnerability Scoring System:
====================================
6.2


Introduction:
=============
vPhoto Pro is your side of the most powerful local album management software that allows you to easily manage your massive photos, 
while giving you an unprecedented user experience. No in-app purchase, no functional limitations.

(Copy of the Homepage:  https://itunes.apple.com/us/app/veryphoto-album-password-wifi/id720810114 )


Abstract:
=========
The Vulnerability Laboratory Research team discovered a file upload web vulnerability in the official vPhoto-Album v4.2 iOS mobile web-application.


Report-Timeline:
================
2015-05-05: Public Disclosure (Vulnerability Laboratory)


Status:
========
Published


Affected Products:
==================
Cheng Chen
Product: vPhoto-Album - iOS Web Application (Wifi) v4.1


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


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


Details:
========
An unrestricted file upload web vulnerability has been discovered in the official vPhoto-Album v4.2 iOS mobile web-application.
The file upload vulnerability allows remote attackers to upload an arbitrary (malicious) file to compromise the iOS web-application. 

The file upload vulnerability is located in the `name` value of the `Albums` module. Remote attackers are able to intercept the 
vulnerable name value in the upload POST method request to compromise the app path. The attacker can use a live session tamper in 
http to change the album name parameter to a malicious source.

The security risk of the file upload vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.2. 
Exploitation of the web vulnerability requires no user interaction or privileged web-application user account. Successful exploitation 
of the local file upload web vulnerability results in mobile iOS web-application compromise or compromise of connected device components.

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

Vulnerable Module(s):
				[+] Albumname

Vulnerable Parameter(s):
				[+] name

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


Proof of Concept:
=================
The unrestricted file upload web vulnerability can be exploited by attackers with restricted physical device access and without user interaction.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.


PoC: http://localhost:8080/
<script type="text/javascript">
            var albumArray = getAllAlbum();
            var numberOfAlbums = getNumberOfAlbums();
           for (var i=0; i<numberOfAlbums; i=i+4)
            {
                document.write("<tr>");
                document.write("<td height="170" width="150">");
                if (i+0 < numberOfAlbums)
                {
                    document.write("<p align="center"><img border="0" src="getCoverImage?"+encodeURI(JSON.stringify(albumArray[i+0]))+"" width="170" height="150" onclick=albumClick('"+(i+0)+"')>");
                }
                document.write("</td>");
                document.write("<td height="170" width="50"></td>");
                document.write("<td height="170" width="150">");
                if (i+1 < numberOfAlbums)
                {
                    document.write("<p align="center"><img border="0" src="getCoverImage?"+encodeURI(JSON.stringify(albumArray[i+1]))+"" width="170" height="150" onclick=albumClick('"+(i+1)+"')>");
                }
                document.write("</td>");
                document.write("<td height="170" width="50"></td>");
                document.write("<td height="170" width="150">");
                if (i+2 < numberOfAlbums)
                {
                    document.write("<p align="center"><img border="0" src="getCoverImage?"+encodeURI(JSON.stringify(albumArray[i+2]))+"" width="170" height="150" onclick=albumClick('"+(i+2)+"')>");
                }
                document.write("</td>");
                document.write("<td height="170" width="50"></td>");
                document.write("<td height="170" width="150">");
                if (i+3 < numberOfAlbums)
                {
                    document.write("<p align="center"><img border="0" src="getCoverImage?"+encodeURI(JSON.stringify(albumArray[i+3]))+"" width="170" height="150" onclick=albumClick('"+(i+3)+"')>");
                }
                document.write("</td>");
                document.write("</tr>");
                document.write("<tr>");
                document.write("<td height="20" > <p align="center">");
                if (i+0 < numberOfAlbums)
                {
                    document.write("<font face="Courier New" size="2">");
                    document.write(albumArray[i+0].name+"("+albumArray[i+0].numberOfImage+")");
                    document.write("</font>");
                }
                document.write("</td>");
                document.write("<td height="20" width="50"></td>");
                document.write("<td height="20" > <p align="center">");
                if (i+1 < numberOfAlbums)
                {
                    document.write("<font face="Courier New" size="2">");
                    document.write(albumArray[i+1].name+"("+albumArray[i+1].numberOfImage+")");
                    document.write("</font>");
                }
                document.write("</td>");
                document.write("<td height="20" width="50"></td>");
                document.write("<td height="20" > <p align="center">");
                if (i+2 < numberOfAlbums)
                {
                    document.write("<font face="Courier New" size="2">");
                    document.write(albumArray[i+2].name+"("+albumArray[i+2].numberOfImage+")");
                    document.write("</font>");
                }
                document.write("</td>");
                document.write("<td height="20" width="50"></td>");
                document.write("<td height="20" > <p align="center">");
                if (i+3 < numberOfAlbums)
                {
                    document.write("<font face="Courier New" size="2">");
                    document.write(albumArray[i+3].name+"("+albumArray[i+3].numberOfImage+")");
                    document.write("</font>");
                }
                document.write("</td>");
                document.write("</tr>");
                document.write("<tr>");
                document.write("<td height="20" colspan="7">"); document.write("</td>");
                document.write("</tr>");
            }
			
</script>
<tr><td height="170" width="150"><p align="center">
<img src="getCoverImage?%7B%22name%22:../not_allowed_dirctory/newfile.*%3E%22,%22type%22:%222%22,%22groupType%22:2,%22url
%22:%22assets-library://group/?id=B94CC6C9-FB2C-4BFD-8BA4-0925E51146A1&filter=1537%22,%22numberOfImage%22:%222%22%7D" onclick="albumClick('0')" 
border="0" height="150" width="170"></p></td><td height="170" width="50"></td><td height="170" width="150"><p align="center">
<img src="getCoverImage?%7B%22name%22:%22Camera%20Roll%22,%22type%22:%222%22,%22groupType%22:16,%22url%22:%22
assets-library://group/?id=70169F06-36C7-430C-AA4F-55B95E268426%22,%22numberOfImage%22:%222%22%7D" onclick="albumClick('1')" 
border="0" height="150" width="170"></p></td><td height="170" width="50"></td><td height="170" width="150"></td><td height="170" 
width="50"></td><td height="170" width="150"></td></tr><tr><td height="20"> <p align="center"><font face="Courier New" size="2">">
<C[FILE INCLUDE VULNERABILITY!]>(2)</font></td><td height="20" width="50"></td><td height="20" > <p align="center"><font face="Courier New" 
size="2">Camera Roll(2)</font></td><td height="20" width="50"></td><td height="20" > <p align="center"></td><td height="20" width="50"></td>
<td height="20" > <p align="center"></td></tr><tr><td height="20" colspan="7"></td></tr>	
</table></div></body>
</html></iframe></font></p></td></tr></tbody>


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


Risk:
=====
The security risk of the unrestricted file upload web vulnerability in the album module is estimated as high. (CVSS 6.2)


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


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===========
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