Vulnerability Note VU#768840

Automated Solutions Modbus/TCP Master OPC server Modbus TCP header vulnerability

Original Release date: 03 Feb 2011 | Last revised: 03 Feb 2011


Automated Solutions OPC Server contains a heap corruption vulnerability in the Modbus/TCP Master OPC server.


Automated Solutions Modbus/TCP Master OPC Server contains a heap corruption vulnerability. The server is vulnerable to an attacker writing an arbitrary number of double words or DWORDs onto the heap.

For additional information see ICSA-10-322-02A.

Exploit code for this vulnerability is publicly available.


Successful exploitation would likely not allow arbitrary code execution; however, an exploit could possibly corrupt the OPC server memory and cause a denial of service.



According to the Modbus/TCP OPC Server readme file, version 3.0.2 addresses this vulnerability.

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Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Automated SolutionsAffected-26 Jan 2011
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



Thanks to Jeremy Brown for reporting this vulnerability to ICS-CERT.

This document was written by Michael Orlando.

Other Information

  • CVE IDs: CVE-2010-4709
  • Date Public: 22 Nov 2010
  • Date First Published: 03 Feb 2011
  • Date Last Updated: 03 Feb 2011
  • Severity Metric: 1.02
  • Document Revision: 22


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