Date: 21 November 2007
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AUSCERT External Security Bulletin Redistribution
ESB-2007.0942 -- [Win]
Vulnerability Note VU#138633 Invensys Wonderware InTouch
creates insecure NetDDE share
21 November 2007
AusCERT Security Bulletin Summary
Product: Invensys Wonderware InTouch 8.0
Operating System: Windows 2000
Impact: Execute Arbitrary Code/Commands
CVE Names: CVE-2007-6033
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Vulnerability Note VU#138633
Invensys Wonderware InTouch creates insecure NetDDE share
Invensys Wonderware InTouch 8.0 creates a NetDDE share that could
allow an attacker to run arbitrary programs.
Invensys Wonderware InTouch HMI Software is used in Supervisory
Control And Data Acquisition (SCADA) systems.
Dynamic Data Exchange (DDE) was designed to allow Microsoft
Windows applications to share data. NetDDE is an extension to DDE
that was developed by Wonderware. NetDDE allows communications with
local DDE applications and with remote NetDDE agents using NetBIOS.
NetDDE is not supported in Windows Vista, but is included in Windows
NT, 2000, XP, and Server 2003.
InTouch 8.0 creates a universal NetDDE share. The permissions applied
to the share may allow a remote attacker to execute arbitrary
programs. Windows access permissions apply to NetDDE connections,
however if an attacker can obtain valid credentials, or possibly
if anonymous connections are enabled, the attacker could connect to
the NetDDE share and execute programs.
A remote attacker may be able to execute any application that accepts
This issue has been addressed in Wonderware InTouch version 9 and
later. Wonderware administrators with active support contracts who do
not want to upgrade can get an updated version of Wonderware 8.0.
Wonderware Tech Alert 98 contains information about obtaining
fixed software. Wonderware users that do not have an active support
contract should contact Wonderware for more information about updates.
Per Micrososoft Security Bulletin MS04-031 (which describes an
unrelated NetDDE vulnerability in Windows), blocking the below ports
at perirmeter firewalls can prevent remote NetDDE connections.
* Ports 135/udp, 137/udp, 138/udp, 445/udp, 135/tcp, 139/tcp,
445/tcp, and 593/tcp
* All unsolicited inbound traffic on ports greater than 1024
* Any other specifically configured RPC port
Vendor Status Date Updated
Invensys Vulnerable 19-Nov-2007
This vulnerability was reported by Neutralbit with assistance from
This document was written by Ryan Giobbi.
Date Public 11/19/2007
Date First Published 11/19/2007 10:38:25 AM
Date Last Updated 11/20/2007
Document Revision 21
If you have feedback, comments, or additional information about this
vulnerability, please send us email.
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