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AUSCERT External Security Bulletin Redistribution
ESB-2021.2302
Advisory (icsa-21-182-02) Sensormatic Electronics C-CURE 9000
2 July 2021
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AusCERT Security Bulletin Summary
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Product: Sensormatic Electronics C-CURE 9000
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands — Existing Account
Reduced Security — Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27660
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-182-02
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ICS Advisory (ICSA-21-182-02)
Sensormatic Electronics C-CURE 9000
Original release date: July 01, 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 8.8
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Sensormatic Electronics, LLC, a subsidiary of Johnson Controls
o Equipment: C-CURE 9000
o Vulnerability: Improper Input Validation
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow remote execution of
lower privileged Windows programs.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Johnson Controls reports the vulnerability affects the following product:
o C-CURE 9000: All versions prior to 2.80
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER INPUT VALIDATION CWE-20
An insecure client automatic update feature in C-CURE 9000 can allow remote
execution of lower privileged Windows programs.
CVE-2021-27660 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Ireland
3.4 RESEARCHER
Johnson Controls, Inc., reported this vulnerability to CISA.
4. MITIGATIONS
Johnson Controls recommends users upgrade to Version 2.80 or later. If this is
not possible, Johnson Controls recommends following the published instructions
for disabling the auto update feature (search for document
SWH-TAB-nID-000006545).
For more detailed mitigation instructions, please see Johnson Controls Product
Security Advisory JCI-PSA-2021-10 v1
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.
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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
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NOTE: This is only the original release of the security bulletin. It may
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Previous advisories and external security bulletins can be retrieved from:
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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).
On call after hours for member emergencies only.
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