CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
Percentile
47.8%
An unauthenticated user could use a malicious request to run arbitrary commands as root user.
The following versions of Sensormatic iSTAR Ultra, a network-ready door controller, are affected:
3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
The affected product is vulnerable to a command injection that could allow an unauthenticated user root access to the system.
CVE-2022-21941 has been assigned to this vulnerability. A CVSS v3 base score of 10.0 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).
Khoa Hoang reported this vulnerability to Johnson Controls, Inc. Johnson Controls, Inc. reported this vulnerability to CISA.
Sensormatic Electronics has released the following firmware version to mitigate this vulnerability:
For more detailed mitigation instructions, users should see Johnson Controls Product Security Advisory JCI-PSA-2022-13 v1
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. 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.
cisa.gov/ics
cisa.gov/ics
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cwe.mitre.org/data/definitions/77.html
nvd.nist.gov/vuln/detail/CVE-2022-21941
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www.cisa.gov/uscert/ics/alerts/ICS-ALERT-10-301-01
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