Rockwell Automation AADvance Standalone OPC-DA Server

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1. EXECUTIVE SUMMARY

• CVSS v3 9.8
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Rockwell Automation
• Equipment: AADvance Standalone OPC-DA Server
• Vulnerabilities: Improper Input Validation, Use of Externally Controlled Format String

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code in the affected product.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Rockwell Automation AADvance Standalone OPC-DA Server are affected:

• AADvance Standalone OPC-DA Server: Versions v2.01.510 and later

3.2 Vulnerability Overview

3.2.1 IMPROPER INPUT VALIDATION CWE-20

An arbitrary code execution vulnerability exists in the affected product. The log4net config file does not disable XML external entities.

CVE-2018-1285 has been assigned to this vulnerability. A CVSS v3.1 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

3.2.2 USE OF EXTERNALLY CONTROLLED FORMAT STRING CWE-134

An arbitrary code execution vulnerability exists in the affected product. The vulnerability occurs due to a vulnerable component, the format string in log4net.

CVE-2006-0743 has been assigned to this vulnerability. A CVSS v3.1 base score of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: United States

3.4 RESEARCHER

Rockwell Automation reported these vulnerabilities to CISA.

4. MITIGATIONS

Rockwell Automation has released product updates addressing these vulnerabilities:

• AADvance Standalone OPC-DA Server: Update to v2.02 or later

Users with the affected software are encouraged to apply the risk mitigations, if possible.

• For information on how to mitigate Security Risks on industrial automation control systems, Rockwell Automation encourages users to implement our suggested security best practices to minimize the risk of the vulnerability.

Users can use Stakeholder-Specific Vulnerability Categorization to generate more environment-specific prioritization.

CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities, such as:

• Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet.
• Locate control system networks and remote devices behind firewalls and isolating them from business networks.
• When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.

CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time.

5. UPDATE HISTORY

• August 13, 2024: Initial Publication

• Rockwell Automation