RISK EVALUATION. Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service by sending invalid credentials.
Under certain circumstances, invalid authentication credentials could be sent to the login endpoint of Johnson Controls Metasys and Facility Explorer products to cause denial-of-service.
CVE-2023-4486 has been assigned to this vulnerability.
A CVSS v3.1 base score of 7.5 has been calculated; the CVSS vector string is.
For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2023-08 v1.
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, 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.
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 Cyber News was published on www.cisa.gov. Publication date: Thu, 07 Dec 2023 17:00:27 +0000