Rockwell Automation Logix Controllers

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1. EXECUTIVE SUMMARY

• CVSS v4 8.7
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Rockwell Automation
• Equipment: Compact GuardLogix, CompactLogix, ControlLogix, GuardLogix, 1756-EN4TR
• Vulnerability: Uncontrolled Resource Consumption

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service on the affected products.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Rockwell Automation Logix Controllers, are affected:

• CompactLogix 5380: All versions later than v33.011 up to v33.015
• Compact GuardLogix 5380: All versions later than v33.011 up to v33.015
• CompactLogix 5480: All versions later than v33.011 up to v33.015
• ControlLogix 5580: All versions later than v33.011 up to v33.015
• GuardLogix 5580: All versions later than v33.011 up to v33.015
• 1756-EN4TR: Version v3.002

3.2 Vulnerability Overview

3.2.1 UNCONTROLLED RESOURCE CONSUMPTION CWE-400

Due to a memory leak, a denial-of-service vulnerability exists in the affected products. A malicious actor could exploit this vulnerability by performing multiple actions on certain webpages of the product causing the affected products to become fully unavailable and require a power cycle to recover.

CVE-2024-8626 has been assigned to this vulnerability. A CVSS v3.1 base score of 8.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

A CVSS v4 score has also been calculated for CVE-2024-8626. A base score of 8.7 has been calculated; the CVSS vector string is (CVSS4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N).

3.3 BACKGROUND

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

3.4 RESEARCHER

Rockwell Automation reported this vulnerability to CISA.

4. MITIGATIONS

Rockwell Automation offers users the following solutions:

• CompactLogix 5380: Update to v33.015 and later for versions 33. Update to v34.011 and later
• Compact GuardLogix 5380: Update to v33.015 and later for versions 33. Update to v34.011 and later
• CompactLogix 5480: Update to v33.015 and later for versions 33. Update to v34.011 and later
• ControlLogix 5580: Update to v33.015 and later for versions 33. Update to v34.011 and later
• GuardLogix 5580: Update to v33.015 and later for versions 33. Update to v34.011 and later
• 1756-EN4TR: Update to version 4.001 and later

Users of the affected software who are not able to upgrade to one of the corrected versions are encouraged to apply security best practices, where possible.   

• Security Best Practices

For more information about this issue, please see the advisory on the Rockwell Automation security page.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, 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 this vulnerability has been reported to CISA at this time.

5. UPDATE HISTORY

• October 10, 2024: Initial Publication

• Rockwell Automation