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iPic Sharp 1.2.1 Wifi Script Insertion

iPic Sharp 1.2.1 Wifi Script Insertion
Posted Jul 24, 2013
Authored by Benjamin Kunz Mejri, Vulnerability Laboratory | Site vulnerability-lab.com

iPic Sharp version 1.2.1 Wifi for iOS suffers from a local script insertion issue.

tags | exploit, local
systems | cisco, ios
SHA-256 | a5433fa7faac6fc77af274a37017e674b24332ffbee28a83a05ba18a5f260d4c

iPic Sharp 1.2.1 Wifi Script Insertion

Change Mirror Download
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@evolution-sec.com)


Disclaimer:
===========
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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Copyright © 2013 | Vulnerability Laboratory [Evolution Security]



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