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

Vulnerability Note VU#768840

Original Release Date: 2011-02-03 | Last Revised: 2011-02-03

Overview

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

Description

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.

Impact

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.

Solution

Upgrade

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

Restrict Access

Enable firewall rules to restrict access to only trusted sources.

Vendor Information

768840
 

CVSS Metrics

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References

Acknowledgements

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
Severity Metric: 1.02
Date Public: 2010-11-22
Date First Published: 2011-02-03
Date Last Updated: 2011-02-03 15:09 UTC
Document Revision: 22

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