CISA Advisory: Rockwell Automation ControlLogix | CISA

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1. EXECUTIVE SUMMARY

• CVSS v4 8.7
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Rockwell Automation
• Equipment: ControlLogix
• Vulnerability: Improper Input Validation

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to send a specially crafted CIP message and cause a denial-of-service condition on the affected device.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following Rockwell Automation products are affected:

• ControlLogix 5580: Versions prior to V33.017, V34.014, V35.013, V36.011
• ControlLogix 5580 Process: Versions prior to V33.017, V34.014, V35.013, V36.011
• GuardLogix 5580: Versions prior to V33.017, V34.014, V35.013, V36.011
• CompactLogix 5380: Versions prior to V33.017, V34.014, V35.013, V36.011
• Compact GuardLogix 5380 SIL 2: Versions prior to V33.017, V34.014, V35.013, V36.011
• Compact GuardLogix 5380 SIL 3: Versions prior to V33.017, V34.014, V35.013, V36.011
• CompactLogix 5480: Versions prior to V33.017, V34.014, V35.013, V36.011
• FactoryTalk Logix Echo: Versions prior to V33.017, V34.014, V35.013, V36.011

3.2 Vulnerability Overview

3.2.1 Improper Input Validation CWE-20

A denial-of-service vulnerability exists in the affected products that will cause the device to result in a major nonrecoverable fault (MNRF) when it receives an invalid CIP request. To exploit this vulnerability, a malicious user must chain this exploit with CVE 2021-22681 and send a specially crafted CIP message to the device. If exploited, a threat actor could help prevent access to the legitimate user and end connections to connected devices including the workstation. To recover the controllers, a download is required which ends any process that the controller is running.

CVE-2024-6207 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

A CVSS v4 score has also been calculated for CVE-2024-6207. 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:N/VI:N/VA:H/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

Trevor Flynn reported this vulnerability to CISA.

4. MITIGATIONS

Rockwell Automations recommends users update to V33.017, V34.014, V35.013, or V36.011.

Additionally, Rockwell automation encourages users to apply security best practices to minimize the risk of vulnerability.

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.

CISA also recommends users take the following measures to protect themselves from social engineering attacks:

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

5. UPDATE HISTORY

• October 10, 2024: Initial Publication