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AUSCERT External Security Bulletin Redistribution
ESB-2021.1838
Advisory (icsa-21-147-02) Johnson Controls Sensormatic
Electronics VideoEdge
28 May 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: VideoEdge
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Administrator Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3156
Reference: ESB-2021.1330
ESB-2021.1012
ESB-2021.0609
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-147-02
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ICS Advisory (ICSA-21-147-02)
Johnson Controls Sensormatic Electronics VideoEdge
Original release date: May 27, 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 7.8
o ATTENTION: Low attack complexity
o Vendor: Sensormatic Electronics, LLC, a subsidiary of Johnson Controls
o Equipment: VideoEdge
o Vulnerability: Off-by-one Error
2. RISK EVALUATION
Under specific circumstances, a local authenticated user may be able to exploit
this vulnerability to gain administrative access.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Johnson Controls reports the vulnerability affects the following Sensormatic
Electronics products:
o VideoEdge versions prior to 5.7.0
3.2 VULNERABILITY OVERVIEW
3.2.1 OFF-BY-ONE ERROR CWE-193
VideoEdge calculates or uses an incorrect maximum or minimum value that is one
more, or one less, than the correct value.
CVE-2021-3156 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/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 reported this vulnerability to CISA.
4. MITIGATIONS
Johnson Controls recommends users upgrade to the latest VideoEdge release
(currently 5.7.0). If this is not possible, a sudo patch is available from the
American Dynamics website for VideoEdge 5.4.2 and 5.6.0. VideoEdge 5.4.1 and
older cannot be patched and should be upgraded.
American Dynamics is a Johnson Controls brand. Users may contact American
Dynamics technical support for assistance with updating their operating system.
https://www.americandynamics.net/Support
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
o Practice principles of least privilege.
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target this vulnerability. This
vulnerability is not exploitable remotely.
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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