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Beckhoff TwinCAT Out-Of-Bounds Read Denial of Service (CVE-2011-3486)


Check Point Reference: CPAI-2012-831
Date Published:
Industry Reference(s): CVE-2011-3486
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
TwinCAT and earlier
Vulnerability Description
A denial of service vulnerability has been reported in Beckhoff TwinCAT.
Vulnerability Details
The vulnerability is due to an out-of-bounds read. A remote attacker can exploit this issue by sending a specially crafted packet to the target. Successful exploitation will cause Beckhoff TwinCAT to crash, resulting in a denial of service condition.

Protection Overview
This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  1. In the IPS tab, click Protections and find the Beckhoff TwinCAT Out-Of-Bounds Read Denial of Service protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: SCADA Protection Violation
Attack Information: Beckhoff TwinCAT Out-Of-Bounds Read Denial of Service