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iPic Sharp v1.2.1 Wifi iOS - Persistent Foldername Web Vulnerability



Title:
======
iPic Sharp v1.2.1 Wifi iOS - Persistent Foldername Web Vulnerability


Date:
=====
2013-07-24


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=1031


VL-ID:
=====
1031


Common Vulnerability Scoring System:
====================================
3.6


Introduction:
=============
iPic Sharp Pro is a photos/video management app,can manage your photos/video 
into folders and subfolders, 
Compress photos/folders into zip file and extract photos from a compressed 
(zip/rar), Use password protect 
your files, and transfer photos/(zip/rar) between computer and your devices.

Password protect
Password lock entire app
Password lock wifi
Password lock individual folder

View Photos
Photo gallery
Slide show
Thumbnail preview
View Photos app

File Sharing
USB File Sharing via iTunes
Http File Sharing via WiFi, Support Safari, chrome, firefox and IE6/7/8/9 
(Slide show )
Chrome and Firefox Supported upload multiple files
Email multiple files, folder Supported

Archives
Extract photos from a compressed zip/rar file
Compression files/folders to zip file
Archives rename, email, batch

( Copy of the Homepge: 
https://itunes.apple.com/en/app/ipic-sharp-pro/id449820537 )


Abstract:
=========
The Vulnerability Laboratory Research Team discovered a persistent input 
validation vulnerability in the iPic Sharp v1.2.1 application (Apple iOS - iPad 
& iPhone).


Report-Timeline:
================
2013-07-24:    Public Disclosure (Vulnerability Laboratory)


Status:
========
Published


Affected Products:
==================
Apple AppStore
Product: iPic Sharp - Application 1.2.1


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


Severity:
=========
Medium


Details:
========
A persistent input validation web vulnerability is detected  in the iPic Sharp 
v1.2.1 application (Apple iOS - iPad & iPhone).
The bug allows an attacker (remote) to implement/inject malicious script code 
to the application side (persistent) of the device.

The vulnerability is located in the index file dir listing module of the 
web-server (http://localhost:41493) when processing to 
request via POST method local manipulated `album folder names`. The persistent 
script code will be executed in the main 
index file dir listing module when the service lists the new malicious injected 
foldername as separate item. Attackers can locally 
change the normal album names inside of the apple iOS device (ipad or iphone) 
to execute the code when a user is requesting the 
mobile application index with the foldername listing.

Exploitation of the persistent web vulnerability requires low user interaction 
and a local privilege application & device account.
Successful exploitation of the vulnerability can lead to persistent session 
hijacking (customers), account steal via persistent 
web attacks, persistent phishing or stable (persistent) certificate mail 
notification context manipulation.

Vulnerable Application(s):
                                [+] iPic Sharp v1.2.1 - ITunes or AppStore 
(Apple)

Vulnerable Module(s):
                                [+] Index

Vulnerable Parameter(s):
                                [+] foldername

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


Proof of Concept:
=================
The persistent input validation web vulnerability can be exploited by local 
attackers with low user interaction and no privilege 
mobile web application user account. For demonstration or reproduce ...

PoC: Root Parameter

{'isSecret'0,'isSame'1,'isDelete'0,'guid''136'','albumtype'137,'items'[{'PhotoSharp_System_Photo'[{'name''Camera
 
Roll','isdir'1,'id'0,'filesize'0,'modDate''','url''(null)','section''PhotoSharp_System_Photo','localsection''System
 Photos','ispass'0}]},
{'PhotoSharp_Local_Photo'[{'name''.[PERSISTENT INJECTED SCRIPT 
CODE!]','isdir'1,'id'0,'filesize'102,'modDate''2013-07-20 
145009','url''','section''PhotoSharp_Local_Photo','localsection''Local 
Photos','ispass'0}]},
{'PhotoSharp_Local_Document'[{'name''PhotoSharp_Local_Document','isdir'1,'id'0,'filesize'0,'modDate''','url'''
,'section''PhotoSharp_Local_Document','localsection''[PERSISTENT INJECTED 
SCRIPT CODE!]','ispass'0}]}],'dir''','dirlocal'''}


PoC: Source

<tr><td class="photoTd" classname="photoTd"><div id="PhotoSharp_System_Photo_0" 
class="watermarkStart" 
classname="watermarkStart"><a 
href="javascript:loadDir('%2Fu%2FCamera%2520Roll%3FisSystem%3D1','PhotoSharp_System_Photo_0',
'%2Fu%2FCamera%2520Roll');"><img 
src="iPic%20Sharp_files/Camera%2520Roll_75_75.jpg" 
id="img_PhotoSharp_System_Photo_0" 
realurl="(null)" class="logoStart" classname="logoStart"></a><span 
class="spanAlbum" classname="spanAlbum">Camera Roll</span></div></td>
<td class="photoTd" classname="photoTd"><div id="PhotoSharp_Local_Photo_0" 
class="watermarkStart" classname="watermarkStart">
<a 
href="javascript:loadDir('%2Fu%2F.Default%2520Album%3FisSystem%3D0','PhotoSharp_Local_Photo_0','%2Fu%2F.[PERSISTENT
 INJECTED SCRIPT CODE!]');">
<img src="[PERSISTENT INJECTED SCRIPT CODE!]/a.jpg" 
id="img_PhotoSharp_Local_Photo_0" realurl="" class="logoStart" 
classname="logoStart"></a>
<span class="spanAlbum" classname="spanAlbum">Default 
Album</span></div></td><td class="photoTd" classname="photoTd">
<div id="PhotoSharp_Local_Document_0" class="watermarkStart" 
classname="watermarkStart">
<a 
href="javascript:loadDir('%2Fu%2FPhotoSharp_Local_Document%3FisSystem%3D0','PhotoSharp_Local_Document_0','%2Fu%2FPhotoSharp_Local_Document');">
<img src="iPic%20Sharp_files/PhotoSharp_Local_Document_75_75.jpg" 
id="img_PhotoSharp_Local_Document_0" realurl="" 
class="logoStart" classname="logoStart"></a><span class="spanAlbum" 
classname="spanAlbum">[PERSISTENT INJECTED SCRIPT CODE!]</span></div></td>
<td class="photoTd" classname="photoTd"></td><td class="photoTd" 
classname="photoTd"></td><td class="photoTd" classname="photoTd"></td>
<td class="photoTd" classname="photoTd"></td><td class="photoTd" 
classname="photoTd"></td><td class="photoTd" classname="photoTd"></td>
<td class="photoTd" classname="photoTd"></td></tr>


Solution:
=========
The vulnerability can be patched by a secure encoding of the foldername item 
input.
Encode, Filter or parse also the affected output at the file dir index listing 
location when processing to display the item foldername.


Risk:
=====
The security risk of the persistent input validation web vulnerability is 
estimated as medium.


Credits:
========
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri 
(bkm@xxxxxxxxxxxxxxxxx)


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===========
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