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AUSCERT External Security Bulletin Redistribution
ESB-2021.2284
Advisory (icsa-21-180-01) Exacq Technologies exacqVision Web Service
30 June 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Exacq Technologies exacqVision Web Service
Publisher: ICS-CERT
Operating System: Linux variants
Windows
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-27659
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-180-01
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ICS Advisory (ICSA-21-180-01)
Exacq Technologies exacqVision Web Service
Original release date: June 29, 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 5.3
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Exacq Technologies, Inc., a subsidiary of Johnson Controls Inc.
o Equipment: exacqVision Web Service
o Vulnerability: Cross-site Scripting
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker to send
malicious requests on behalf of the victim.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Exacq Technologies exacqVision Web Service software
are affected:
o exacqVision Web Service: Version 21.03 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF INPUT DURING WEB PAGE GENERATION ('CROSS-SITE
SCRIPTING') CWE-79
The software does not sufficiently validate, filter, escape, and/or encode
user-controllable input before it is placed in output used as a web page, which
is served to other users. This may allow an attacker to send malicious requests
on behalf of the victim.
CVE-2021-27659 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:N/I:L/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Ireland
3.4 RESEARCHER
Milan Kyselica and Roman Stevanak reported this vulnerability to Johnson
Controls, Inc.
4. MITIGATIONS
Johnson Controls recommends upgrading all previous versions of exacqVision Web
Service to v21.06
For more detailed mitigation instructions, please see Johnson Controls Product
Security Advisory JCI-PSA-2021-09 v1
Additional security notices and product security guidance can be found at the
Johnson Control ICS Product Security page .
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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