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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-20-324-01) Johnson Controls Sensormatic
Electronics American Dynamics victor Web Client
18 November 2020
AusCERT Security Bulletin Summary
Product: Johnson Controls Sensormatic Electronics American Dynamics
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2020-9049
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ICS Advisory (ICSA-20-324-01)
Johnson Controls Sensormatic Electronics American Dynamics victor Web Client
Original release date: November 17, 2020
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1. EXECUTIVE SUMMARY
o CVSS v3 7.1
o ATTENTION: Exploitable remotely
o Vendor: Sensormatic Electronics, LLC; a subsidiary of Johnson Controls
o Equipment: American Dynamics victor Web Client, Software House CoCURE Web
o Vulnerability: Improper Authorization
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an unauthenticated
attacker on the network to create and sign their own JSON web token and use it
to execute an HTTP API method without the need for valid authentication/
authorization. Under certain circumstances, this could be used by an attacker
to impact system availability by conducting a denial-of-service attack.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Johnson Controls reports this vulnerability affects the following products:
o All versions of victor Web Client up to and including v5.6
o All versions of CoCURE Web Client up to and including v2.90
NOTE : This does not affect the new web-based CoCURE 9000 client that was
introduced in CoCURE 9000 v2.90
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER AUTHORIZATION CWE-285
The software does not perform, or incorrectly performs, an authorization check
when an actor attempts to access a resource or perform an action.
CVE-2020-9049 has been assigned to this vulnerability. A CVSS v3 base score of
7.1 has been calculated; the CVSS vector string is ( AV:A/AC:H/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Ireland
Joachim Kerschbaumer reported this vulnerability to Johnson Controls, Inc.
Johnson Controls advises users to maintain product installations at the latest
release and provides several options for remediation of this issue. See below
victor Web Client: upgrade to v5.6 SP1 (victor Unified Client v5.6 SP1)
CoCURE Web Client: upgrade to a minimum of v2.70 and install the relevant
o CoCURE Web v2.70: install the update Web Client_c2.70_5.2_Update02
o CoCURE Web v2.80: install the update Web Client_c2.80_v5.4.1_Update04
o CoCURE Web v2.90: install the update CCureWeb_2.90_Update01
For more detailed mitigation instructions, please see Johnson Controls Product
Security Advisory JCI-PSA-2020-10 .
Johnson Controls recommends taking steps to minimize risks to building
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 that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that 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 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
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:
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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