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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-21-280-03) Johnson Controls exacqVision
8 October 2021
AusCERT Security Bulletin Summary
Product: Johnson Controls exacqVision
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2021-27665
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ICS Advisory (ICSA-21-280-03)
Johnson Controls exacqVision
Original release date: October 07, 2021
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
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1. EXECUTIVE SUMMARY
o CVSS v3 7.5
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Exacq Technologies, a subsidiary of Johnson Controls, Inc.
o Equipment: exacqVision Server 32-bit
o Vulnerability: Integer Overflow or Wraparound
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an unauthenticated
remote user to exploit an integer overflow in the exacqVision Server with a
specially crafted script and cause a denial-of-service condition.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Exacq Technologies' exacqVision surveillance video
software products are affected:
o exacqVision Server 32-bit: Versions 21.06.11.0 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 INTEGER OVERFLOW OR WRAPAROUND CWE-190
The affected product is vulnerable to an integer overflow vulnerability, which
may allow an attacker to cause a denial-of-service condition.
CVE-2021-27665 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Ireland
Tenable Research reported this vulnerability to Johnson Controls.
Johnson Controls recommends the following:
o Upgrade exacqVision Server 32-bit to Version 21.09 or upgrade to
exacqVision Server 64-bit.
o Current users can obtain the critical software update from the software
download location .
o For more detailed mitigation instructions, please see Johnson Controls
Product Security Advisory JCI-PSA-2021-18v1
o Aligning with CISA recommendations, Johnson Controls recommends taking
steps to minimize risks to all building automation systems.
Further ICS security notices and product security guidance are located at the
Johnson Controls product security website .
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.
CISA also recommends users take the following measures to protect themselves
from social engineering attacks:
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.
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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