CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS
Percentile
22.7%
Successful exploitation of this vulnerability could allow an Active Directory user to execute validated actions without providing a valid password.
Johnson Controls reports this vulnerability affects the following Metasys ADX Server running MVE:
The affected product software does not prove or insufficiently validates user identity claims.
CVE-2022-21936 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H).
Johnson Controls, Inc. reported this vulnerability to CISA.
Johnson Controls recommends users update Metasys ADX Server version 12.0 running MVE with patch 12.0.1. Users should contact Johnson Controls or Authorized Building Control Specialists (ABCS) for more information.
For more detailed mitigation instructions, users should see Johnson Controls Product Security Advisory JCI-PSA-2022-11 at the following location:
Johnson Controls also recommends taking steps to minimize risks to all building automation systems.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability these vulnerabilities. Specifically, users should:
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 at 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.
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 exploits specifically target this vulnerability. This vulnerability is exploitable remotely. This vulnerability has a low attack complexity.
web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-21936
cisa.gov/ics
cisa.gov/ics
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cwe.mitre.org/data/definitions/287.html
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us-cert.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B
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