Printer Pro 5.4.3 Cross Site Scripting

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Document Title:  
===============  
Printer Pro 5.4.3 IOS - Cross Site Scripting   
  
Credits & Authors:  
==================  
TaurusOmar - @TaurusOmar_ ([email protected]) [taurusomar.blogspot.com]  
  
Release Date:  
=============  
2015-08-11  
  
  
Product & Service Introduction:  
===============================  
Print attachments, documents, web pages and more right from your iPhone and iPad to any Wi-Fi or USB printer.  
Printer Pro lets you wirelessly print from the iPhone or iPad. It can print directly to many Wi-Fi printers or any  
printer attached to your Mac or PC via helper application installed on your computer.  
Once installed, Printer Pro appears in the "Open In..." list on your device. This lets you print documents from Mail,  
PDF Expert and many other applications on your iPhone or iPad that support this function.  
  
(Copy of the Vendor Homepage: https://itunes.apple.com/us/app/printer-pro-print-documents/id393313223?mt=8)  
  
  
Abstract Advisory Information:  
==============================  
An independent Vulnerability Laboratory researcher discovered multiple vulnerabilities in the official aplication Printer Pro 5.4.3.  
  
Vulnerability Disclosure Timeline:  
==================================  
2015-08-11: Public Disclosure   
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Readdle  
Product: Printer Pro 5.4.3 - iOS Mobile Application  
  
  
Exploitation Technique:  
=======================  
Local  
  
  
Severity Level:  
===============  
Low  
  
  
Technical Details & Description:  
================================  
An application-side input validation vulnerability has been discovered in the officialPrinter Pro 5.4.3 iOS mobile application.  
The vulnerability allows a local attacker to inject own script code as payload to the application-side of the vulnerable service function or module.  
The vulnerability exists in the TextBox Name contacts in which injects the code is activated When the application is opened and the contact containing   
the script selects to print  
Request Method(s):  
[+] Import  
Vulnerable Module(s):  
[+] Add Contact  
  
Vulnerable Parameter(s):  
[+] TextBox Name  
  
Vulnerable Final(s):  
[+] Print Contact   
  
  
Proof of Concept (PoC):  
=======================  
The persistent input validation web vulnerability can be exploited by local attackers with system user account and without .  
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.  
  
1. Install the ios application ( https://itunes.apple.com/us/app/printer-pro-print-documents/id393313223?mt=8)  
2. Add new Contact with script in the TexBox Name   
2. Start the app and open the import function  
3. Select contact that contains the script  
4. Successful reproduce of the persistent vulnerability!  
  
Proof of Concept (IMAGES):  
  
1. http://i.imgur.com/yku1o1c.jpg  
2. http://i.imgur.com/Q5O3X15.jpg  
3. http://i.imgur.com/uPhL9Ow.jpg  
  
  
PoC: Cross Site Scripting  
<object data="data:text/html;base64,PHNjcmlwdD5hbGVydCgiVnVsbmVyYWJsZSIpOzwvc2NyaXB0Pg=="></object>  
  
  
Security Risk:  
==============  
The security risk of the persistent input validation vulnerability in the name value is estimated as medium. (CVSS 3.7)  
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