CVE-2006-0743 Rockwell Automation CVE debrief

Who should care

Organizations operating Rockwell Automation AADvance Standalone OPC-DA Server in industrial control system environments, particularly those with externally accessible OPC-DA interfaces. Asset owners in critical infrastructure sectors (energy, manufacturing, water/wastewater) using this product for process data access should prioritize patching based on their SSVC analysis.

Technical summary

The vulnerability exists in the log4net logging component used by the AADvance Standalone OPC-DA Server. Format string vulnerabilities in logging frameworks can allow attackers to inject malicious format specifiers that lead to memory corruption or code execution. The affected versions (2.01.510 and later) should be updated to version 2.02 or later to remediate this vulnerability. The network-accessible nature of OPC-DA servers in industrial environments increases exposure risk, though the CVSS scoring indicates the primary impact is to availability rather than confidentiality or integrity.

Defensive priority

medium

Recommended defensive actions

• Update AADvance Standalone OPC-DA Server to version 2.02 or later per vendor guidance
• Review Rockwell Automation security best practices for industrial control systems
• Apply network segmentation and defense-in-depth strategies for OPC-DA server deployments
• Monitor for anomalous log4net-related activity in affected systems
• Use CISA's Stakeholder-Specific Vulnerability Categorization (SSVC) for environment-specific prioritization

Evidence notes

The vulnerability description and remediation guidance are derived from CISA CSAF advisory ICSA-24-226-02. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L indicates network attack vector, low complexity, no privileges required, no user interaction, and availability impact only. The affected product version range (>=v2.01.510) and vendor fix (v2.02 or later) are explicitly stated in the CSAF remediation section.

Official resources