Rockwell Automation 440G TLS-Z
1. EXECUTIVE SUMMARY
- CVSS v4 7.3
- ATTENTION: High attack complexity
- Vendor: Rockwell Automation
- Equipment: 440G TLS-Z
- Vulnerability: Improper Neutralization of Special Elements in Output Used by a Downstream Component
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to take over the device.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Rockwell Automation reports the following products are affected by a vulnerability because they use STMicroelectronics STM32L4 devices:
- 440G TLS-Z: Version v6.001
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIIZATION OF SPECIAL ELEMENTS IN OUTPUT USED BY A DOWNSTREAM COMPONENT CWE-74
A local code execution vulnerability exists in the STMicroelectronics STM32L4 devices due to having incorrect access controls. The affected product utilizes the STMicroelectronics STM32L4 device and because of the vulnerability, a threat actor could reverse protections that control access to the JTAG interface. If exploited, a threat actor can take over the device.
CVE-2020-27212 has been assigned to this vulnerability. A CVSS v3.1 base score of 7.0 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
A CVSS v4 score has also been calculated for CVE-2020-27212. A base score of 7.3 has been calculated; the CVSS vector string is (CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Rockwell Automation reported this vulnerability to CISA.
4. MITIGATIONS
Rockwell Automation encourages users of the affected software to apply the risk mitigations if possible:
- Limit physical access to authorized personnel: Control room, cells/areas, control panels, and devices. See Chapter 4, Harden the Control System of System Security Design Guidelines.
- For information on how to mitigate security risks on industrial automation control systems, Rockwell Automation encourage users to implement security best practices to minimize the risk of the vulnerability.
For more information refer to Rockwell Automation's security advisory.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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. This vulnerability is not exploitable remotely. This vulnerability has a high attack complexity.
5. UPDATE HISTORY
- March 25, 2025: Initial Publication
This product is provided subject to this Notification and this Privacy & Use policy.
Vendor
- Rockwell Automation