Lan Scan HD 1.20 Command Injection

`Document Title:  
===============  
LAN Scan HD v1.20 iOS - Command Inject Vulnerability  
  
  
References (Source):  
====================  
http://www.vulnerability-lab.com/get_content.php?id=1618  
  
  
Release Date:  
=============  
2015-11-05  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
1618  
  
  
Common Vulnerability Scoring System:  
====================================  
5.6  
  
  
Product & Service Introduction:  
===============================  
See whats all connect to your favorite public WiFi network or your home network. This all-in-one information appliation is an extremely fast and   
thorough security solution for every user. LAN Scan HD is an application developed for Network Administrators and IT Managers but presented in a   
format targeted for non-professionals. This application allows you to view information about all the devices on a local network. Network devices   
are displayed in a very logical and convenient format for displaying the most pertinent information about each device.  
  
(Copy of the Product Homepage: https://itunes.apple.com/us/app/lan-scan-hd-network-device/id597952879 )  
  
  
Abstract Advisory Information:  
==============================  
The Vulnerability Laboratory Core Research Team discovered a local command inject vulnerability in the LAN Scan HD v1.20 iOS mobile application.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2015-11-05: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
Nutec Apps - LLC  
Product: LAN Scan HD - iOS (Web-Application) 1.20  
  
  
Exploitation Technique:  
=======================  
Local  
  
  
Severity Level:  
===============  
Medium  
  
  
Technical Details & Description:  
================================  
A local command inject web vulnerability has been discovered in the official LAN Scan HD v1.20 iOS mobile web-application.  
The web vulnerability allows to inject malicious script codes to the application-side of the vulnerable iOS mobile app.  
  
The security vulnerability is located in the device name value of the `Scan Network` module. Local attackers are able to   
manipulate the name value of the device to compromise the mail function of the Lan Scan HD mobile app. The html encoding   
is broken in the `Email Scan` export function. Local attackers are able to manipulate the device name cid name to compromise   
the application internal validation via the `Email Scan` (html). The attack vector of the vulnerability is application-side   
and the injection point is the device name information settings > name > input field.  
  
The security risk of the local commandpath inject vulnerability is estimated as medium with a cvss (common vulnerability   
scoring system) count of 3.6. Exploitation of the local command inject vulnerability requires a low privilege iOS system   
device user account with restricted access and no user interaction. Successful exploitation of the vulnerability results in   
unauthorized execution of system specific commands and unauthorized path value requests to compromise the mobile iOS   
application and connected device components.  
  
Vulnerable Module(s)  
[+] Scan Network  
  
Vulnerable Parameter(s)  
[+] device cell name (cid)  
  
Affected Module(s)  
[+] Email Scan - Mail  
  
  
Proof of Concept (PoC):  
=======================  
The vulnerability can be exploited by local attackers with restricted iOS device user account and without user interaction.  
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.  
  
Manual steps to reproduce the vulnerability ...  
1. Start your iOS device (iPhone or iPad)  
2. Install the LAN Scan HD application to your iOS device  
3. Open the iOS device settings info menu  
4. Change your device name to a malicious payload with path conditions (command inject)  
5. Save the input and open the LAN Scan HD application  
6. Click the Scan Network button on the bottom of the screen  
7. After the scan has been performed successful you click on top right the menu button  
8. Push the Email Scan button to export the scan results  
9. Now, the execution occurs in the email section were the device value is included!  
10. Successful reproduce of the remote vulnerability!  
  
  
PoC: Scan Results.html  
  
<html><head>  
<title>Scan Results</title>  
<link rel="important stylesheet" href="chrome://messagebody/skin/messageBody.css">  
</head><body><table border=0 cellspacing=0 cellpadding=0 width="100%" class="header-part1"><tr><td><b>Betreff: </b>Scan Results</td></tr>  
<tr><td><b>Von: </b>Benjamin Mejri Kunz <[email protected]></td></tr><tr><td><b>Datum: </b>17.10.2015 19:53</td></tr></table>  
<table border=0 cellspacing=0 cellpadding=0 width="100%" class="header-part2"><tr><td><b>An: </b>aki <[email protected]></td></tr></table><br>  
<html><head><meta http-equiv="content-type" content="text/html; "></head><body dir="auto"><div>  
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
<title>Scan PoC</title>  
<table width="600" cellspacing="3">  
<tbody><tr>  
<td width="500"><div align="left"><strong>Network Scanned</strong>: PenTest23-Router</div></td>  
<td width="85"></td></tr>  
</tbody></table>  
<table width="600" cellspacing="3">  
<tbody><tr>  
<td><div align="right">on Date:</div></td>  
<td>17.10.2015, 19:52</td>  
</tr>  
<tr>  
<td width="130"><div align="right">Address Range:</div></td>  
<td width="455">192.168.4.2 - 192.168.4.254</td>  
</tr>  
</tbody></table>  
<br>  
<table width="600" cellspacing="3">  
<tbody><tr>  
<td width="501"><div align="left"><strong>Device Information</strong>:</div></td>  
<td width="84"></td>  
</tr>  
</tbody></table>  
<table width="600" cellspacing="3">  
<tbody><tr>  
<td width="130"><div align="right">Name:</div></td>  
<td width="470">"><-./[LOCAL COMMAND INJECT VULNERABILITY VIA DEVICENAME VALUE!]"></td>  
</tr>  
<tr>  
<td><div align="right">IP Address:</div></td>  
<td>192.168.4.153</td>  
</tr>  
<tr>  
<td><div align="right">MAC:</div></td>  
<td>2:0:0:0:0:0</td>  
</tr>  
<tr>  
<td><div align="right">Vendor:</div></td>  
<td>Apple</td>  
</tr>  
</table>  
<p><strong>Gateway Information:<br /></strong><table width="600" cellspacing="3">  
<tr>  
  
  
Solution - Fix & Patch:  
=======================  
The vulnerability can be patched by a secure parse and encode of the vulnerable device name value in the export function.  
Restrict the input and disallow usage of special chars in names. Filter by an exception handling that prevents the execution of malicious local stored device values.  
  
  
Security Risk:  
==============  
The security risk of the local command inject web vulnerability in the LAN Scan HD application is estimated as medium. (CVSS 5.6)  
  
  
Credits & Authors:  
==================  
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected]) [www.vulnerability-lab.com]  
  
  
Disclaimer & Information:  
=========================  
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.  
  
Domains: www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com  
Contact: [email protected] - [email protected] - [email protected]  
Section: magazine.vulnerability-db.com - vulnerability-lab.com/contact.php - evolution-sec.com/contact  
Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab  
Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php  
Programs: vulnerability-lab.com/submit.php - vulnerability-lab.com/list-of-bug-bounty-programs.php - vulnerability-lab.com/register/  
  
Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. Permission to   
electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by   
Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website   
is trademark of vulnerability-lab team & the specific authors or managers. To record, list (feed), modify, use or edit our material contact   
([email protected] or [email protected]) to get a permission.  
  
Copyright © 2015 | Vulnerability Laboratory - [Evolution Security GmbH]™  
  
  
  
--   
VULNERABILITY LABORATORY - RESEARCH TEAM  
SERVICE: www.vulnerability-lab.com  
CONTACT: [email protected]  
PGP KEY: http://www.vulnerability-lab.com/keys/[email protected]%280x198E9928%29.txt  
  
`