Published:
15 September 2021
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.3094 Advisory (icsa-21-257-02-0) Johnson Controls Sensormatic Electronics KT-1 15 September 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Johnson Controls Sensormatic Electronics KT-1 Publisher: ICS-CERT Impact/Access: Unauthorised Access -- Remote/Unauthenticated Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-27662 Original Bulletin: https://us-cert.cisa.gov/ics/advisories/icsa-21-257-02-0 - --------------------------BEGIN INCLUDED TEXT-------------------- ICS Advisory (ICSA-21-257-02) Johnson Controls Sensormatic Electronics KT-1 Original release date: September 14, 2021 Legal Notice All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/ . 1. EXECUTIVE SUMMARY o CVSS v3 8.6 o ATTENTION: Exploitable remotely/low attack complexity o Vendor: Sensormatic Electronics, LLC., a subsidiary of Johnson Controls, Inc. o Equipment: KT-1 o Vulnerability: Authentication Bypass by Capture-replay 2. RISK EVALUATION Successful exploitation of this vulnerability may allow replay attacks. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Johnson Controls reports this vulnerability affects the following versions of KT-1 door controllers: o Versions up to and including 3.01 3.2 VULNERABILITY OVERVIEW 3.2.1 AUTHENTICATION BYPASS BY CAPTURE-REPLAY CWE-294 The KT-1 door controller is susceptible to replay attacks. CVE-2021-27662 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/ C:H/I:L/A:L ). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: Ireland 3.4 RESEARCHER Dr. Dave Burke, Anthony Connor, and Harrison Spisak reported this vulnerability to Johnson Controls, Inc. 4. MITIGATIONS Johnson Controls recommends users upgrade the KT-1 controller to Version 3.04 and upgrade EntraPass to Version 8.40 For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2021-14 Johnson Controls recommends taking steps to deploy recommend practices to minimize risks to all building automation systems. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet . o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o When remote access is required, use 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 its 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 us-cert.cisa.gov . Several recommended 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 on us-cert.cisa.gov in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies . Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target this vulnerability. For any questions related to this report, please contact the CISA at: Email: CISAservicedesk@cisa.dhs.gov Toll Free: 1-888-282-0870 CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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