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TaxiMonger 2.6.2; 2.3.3 (Android) - Persistent Application Vulnerability
From: Vulnerability Lab <research () vulnerability-lab com>
Date: Sat, 15 Jun 2013 12:27:06 +0100

Title:
======
TaxiMonger 2.6.2; 2.3.3 (Android) - Persistent Application Vulnerability


Date:
=====
2013-06-15


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=972


VL-ID:
=====
972


Common Vulnerability Scoring System:
====================================
3.9


Introduction:
=============
The one and only taxi review platform for Malaysia and South-East Asia is here, equipped with taxi booking feature! 
Ever been cheated 
by rigged taxis, rude taxi drivers making a pass at you, or denied a service simply because they don’t feel like it? Or 
have you ever met 
a wise taxi driver who speaks like Yoda, or had a good taxi ride experience? Share your taxi stories and woes with 
other taxi users, and 
let taxi drivers out there know that taxi users have a voice too.

Vendor Website:         http://taximonger.com/
Product Website:        https://play.google.com/store/apps/details?id=com.taximonger.driver&hl=de


Abstract:
=========
An independent vulnerability researcher (Ismail Kaleem) discovered a persistent web vulnerability in the TaxiMonger 
v2.6.2 mobile android v2.3.3 application.


Report-Timeline:
================
2013-06-15:     Public Disclosure


Status:
========
Published


Affected Products:
==================
TaxiMonger
Product: TaxiMonger App & Online Service 2.6.2 & 2.3.3 (Android)


Exploitation-Technique:
=======================
Remote


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


Details:
========
A persistent input validation web vulnerability is detected in the official Taxi Monger v2.6.2 Android (v2.3.3) Mobile 
Application (Google - PlayStore).
The vulnerability allows remote attackers to inject own malicious persistent (application-side) script codes to 
compromise the android application or device.

The persistent input validation web vulnerability is located in the username input field when processing to inject 
malicious script codes as name.
Attackers can inject own malicious script codes to execute the context persistent from the index listing. To inject the 
script code the remote attacker 
do not need to bypass the basic validation of the application for successful exploitation.

Exploitation of the persistent web vulnerability requires low user interaction and a low privilege application user 
account. Successful exploitation of the 
persistent input validation web vulnerability results in persistent session hijacking, persistent web phishing, 
persistent external redirects or persistent 
module context manipulation.


Vulnerable Module(s):
                                [+] Registration

Vulnerable Input Fields(s):
                                [+] Username

Vulnerable Parameter(s):
                                [+] name (context)

Affected Module(s):
                                [+] Index and Profile Listing


Proof of Concept:
=================
The persistent script coe injection web vulnerability can be exploited by remote attackers with low user interaction 
and low privilege 
application user account. For demonstration or reproduce ...

XSS Payload: <image src=http://vuln-lab.com onerror=alert('ismailkaleem') />

XSS (JS) PoC:

<Script Language='Javascript'>
<!--
document.write(unescape('%3C%69%6D%61%67%65%20%73%72%63%3D%68%74%74%70%3A%2F%2F%76%75%6C%6E%2D%6C%61%62
%2E%63%6F%6D%20%6F%6E%65%72%72%6F%72%3D%61%6C%65%72%74%28%27%69%73%6D%61%69%6C%6B%61%6C%65%65%6D%27%29%20%2F%3E'));
//-->
</Script>


Solution:
=========
Restrict the username and name input field and parse the input with a secure encoding or filter.
Encode and parse the output listing and profile site to prevent persistent script code executions from the main 
application module.


Risk:
=====
The security risk of the persistent input validation web vulnerability is estimated as medium(+)|(-)high.


Credits:
========
Ismail Kaleem - Senior Security Developer | IT Security Department
National Centre for Information Technology | Republic of Maldives


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 
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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



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