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Document Title:
===============
Photo Manager Pro v4.4.0 iOS - File Include Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1445


Release Date:
=============
2015-03-12


Vulnerability Laboratory ID (VL-ID):
====================================
1445


Common Vulnerability Scoring System:
====================================
6.9


Product & Service Introduction:
===============================
Do you have troubles for managing thousands of photos and videos? Do you have any private photos or videos? Are you looking for a photo portfolio app? 
Photo Manager Pro is exactly you are looking for. Photo Manager Pro is extremely easy to use. TP Transfer: Transfer folders and files between computer 
and device over wifi network. HTTP Transfer: Transfer files between computer and device over wifi network. View photos in the browser. Peer to Peer 
Transfer: Directly transfer files between iPad, iPhone and iPod Touch over wifi network. USB Transfer: Import/Export photos from/to iTunes file sharing.
Basic Transfer: Import/Export photos from/to the Photos app.

(Copy of the Vendor Homepage: https://itunes.apple.com/de/app/photo-manager-pro/id393858562 & http://www.linkusnow.com/photomanager/help/ipad/help_main.php )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered a locla file include vulnerability in the official Linkus Photo Manager Pro v4.4.0 iOS mobile web-application.


Vulnerability Disclosure Timeline:
==================================
2015-03-12:	Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Linkus
Product: Photo Manager Pro - iOS Mobile Web Application (Wifi) 4.4.0


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


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


Technical Details & Description:
================================
A local file include web vulnerability has been discovered in the official Linkus Photo Manager Pro v4.4.0 iOS mobile web-application.
The local file include web vulnerability allows remote attackers to unauthorized include local file/path requests or system specific path 
commands to compromise the mobile web-application.

The web vulnerability is located in the `filename` value of the `upload.action` module. Remote attackers are able to inject own files with 
malicious `filename` values in the `upload.action` POST method request to compromise the mobile web-application. The local file/path include 
execution occcurs in the index dir listing of the wifi interface. The attacker is able to inject the local file include request by usage of 
the `wifi interface` in connection with the vulnerable upload service module.

Remote attackers are also able to exploit the filename validation issue in combination with persistent injected script codes to execute unique
local malicious attack requests. The attack vector is located on the application-side of the wifi service and the request method to inject is POST.
To exploit the bug it is required to use the local device > wifi sync or (remote) the wifi gui.

The security risk of the local file include web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.9. 
Exploitation of the local file include vulnerability requires no user interaction or privileged web-application user account. Successful exploitation 
of the local file include web vulnerability results in mobile application or device compromise.

Request Method(s):
					[+] POST

Vulnerable Module(s):
					[+] upload.action

Vulnerable Parameter(s):
					[+] filename

Affected Module(s):
					[+] disp_photo.action


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

PoC: 
http://localhost:8080/disp_photo.action?filename=./[LOCAL FILE INCLUDE VULNERABILITY!]2.png


PoC: Vulnerable Source
<div id="photo_content">
<img id="photo" src="disp_photo.action?filename=./[LOCAL FILE INCLUDE VULNERABILITY!]2.png" height="606"></div>


--- Poc Session Logs [POST] (Inject) ---
Status: 200[OK] 
POST http://localhost:8080/upload.action?folderID=5 Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[31] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Referer[http://localhost:8080/upload.html?folderID=5]
      Cookie[isenabledpasscode=false]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------15932100885119
Content-Disposition: form-data; name="is_submitted"
false
-----------------------------15932100885119
Content-Disposition: form-data; name="upload_file"; filename="./[LOCAL FILE INCLUDE VULNERABILITY!]2.png"
Content-Type: image/png
-

Status: 200[OK]
GET http://localhost:8080/upload.html?folderID=5 Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[8085] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:35.0) Gecko/20100101 Firefox/35.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      Cookie[isenabledpasscode=false]
      Connection[keep-alive]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[8085]
      Date[Do., 05 März 2015 20:52:18 GMT]



Reference(s):
http://localhost:8080/upload.action?folderID=
http://localhost:8080/upload.html?folderID=
http://localhost:8080/disp_photo.action?filename=


Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure validation of the filename value in the upload POST method request. Restrict the filename input and 
disallow special chars. Ensure that not multiple file extensions are loaded in the filename value to prevent arbitrary file upload attacks.


Security Risk:
==============
The security risk of thelocal file inelcude web vulnerability in the photo manager wifi service is estimated as high. (CVSS 6.9)


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


Disclaimer & Information:
=========================
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