Subsembly Banking 3.1.x - Persistent Filter Vulnerability

Document Title:
===============
Subsembly Banking 3.1.x - Persistent Filter Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=74


Release Date:
=============
2011-09-11


Vulnerability Laboratory ID (VL-ID):
====================================
74


Common Vulnerability Scoring System:
====================================
3.5


Product & Service Introduction:
===============================
Subsembly Banking 3.0 ist Ihre persönliche Finanzverwaltung und Online-Banking-Zentrale zugleich. 
Erledigen Sie Bankgeschäfte einfach und komfortabel. HBCI, FinTS und eine 256 Bit AES Verschlüsselung 
garantieren für Sicherheit. Subsembly Banking 3.0 gibt es für Windows XP und Windows Vista, wobei auch 
die portable Installation auf einem U3 Smart Drive oder anderem USB-Stick möglich ist. Haben Sie einen 
Windows Mobile PDA oder Smartphone? Mit Subsembly Banking Mobile brauchen Sie auch unterwegs nicht auf 
den Komfort von Subsembly Banking verzichten, und das ganz ohne ein schweres Laptop mitzunehmen. Alle 
Subsembly Banking Daten werden bei der nächsten Verbindung mit dem Desktop-PC automatisch synchronisiert. 
So haben Sie jederzeit den aktuellen Datenbestand da, wo Sie ihn gerade brauchen. dem TÜV-Prüfsiegel 
„Geprüfte Software“ ausgezeichnet.

(Copy of the Vendor Homepage: http://subsembly.com/)


Abstract Advisory Information:
==============================
Vulnerability-Lab Team discovered a persistent software vulnerabilities on Subsemblys famous online banking software.


Vulnerability Disclosure Timeline:
==================================
2011-07-03:	Vendor Notification
2011-**-**:	Vendor Response/Feedback
2011-**-**:	Vendor Fix/Patch
2011-09-12:	Public or Non-Public Disclosure


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


Affected Product(s):
====================

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


Severity Level:
===============
Low


Technical Details & Description:
================================
Multiple persistent input validation vulnerabilities are detected on the Subsembly Banking Software v3.1. 
Attacker can implement own malicious & persistent script codes on a Software main menu. This vulnerability 
allows an attacker to manipulate database files & the bug can result in the modification/manipulation of the 
subsembly banking software.

Vulnerable Module(s):
		                           	[+] Wertpapier/Depot - Index Listing

Pictures:
			../extern.png
			../trojan.png


Proof of Concept (PoC):
=======================
The vulnerability can exploited by local or remote attackers. For demonstration or reproduce ...

Password 4 DB: >"<iframe src=http://global-evolution.info width=800 height=800> 
Download PoC in DB:  ../PoC.rar     <= No Mercy


Follow the easy steps to reproduce the bug with db file ...

1. Start software load the database and open it with password
2. Click on overview to see persistent integrated script code

Reproduce manually ...

1. Open the software
2. Set a password for your database
3. Switch over the configuration to "Wertpapier-depot" anlegen.
4. Integrate as name the own script code & execute with a save
5. Switch back to the Index Listing were the script code get executed persistent


Security Risk:
==============
The security risk of the persistent software vulnerability is estimated as high.


Credits & Authors:
==================
Vulnerability Research Laboratory - Benjamin Kunz Mejri (Rem0ve)


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