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AUSCERT External Security Bulletin Redistribution
ESB-2022.1708
Advisory (icsa-22-109-01) Interlogix Hills ComNav
20 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Interlogix Hills ComNav
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-26519 CVE-2022-1318
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-109-01
Comment: CVSS (Max): 6.2 CVE-2022-1318 (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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ICS Advisory (ICSA-22-109-01)
Interlogix Hills ComNav
Original release date: April 19, 2022
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 6.2
o ATTENTION: Low attack complexity
o Vendor: Interlogix is a part of Carrier Global Corporation
o Equipment: Hills ComNav
o Vulnerabilities: Improper Restriction of Excessive Authentication Attempts,
Inadequate Encryption Strength
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to log
in to modify the system.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Carrier reports these vulnerabilities affect the following Hills ComNav remote
access integration modules:
o Hills ComNav: versions prior to 3002-19
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER RESTRICTION OF EXCESSIVE AUTHENTICATION ATTEMPTS CWE-307
There is no limit to the number of attempts to authenticate for the local
configuration pages for the Hills ComNav Version 3002-19 interface, which
allows local attackers to brute-force credentials.
CVE-2022-26519 has been assigned to this vulnerability. A CVSS v3 base score of
5.5 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/
C:H/I:N/A:N ).
3.2.2 INADEQUATE ENCRYPTION STRENGTH CWE-326
Hills ComNav Version 3002-19 suffers from a weak communication channel. Traffic
across the local network for the configuration pages can be viewed by a
malicious actor. The size of certain communications packets is predictable.
These issues could allow an attacker to learn the state of the system if they
can observe the traffic. This would be possible even if the traffic was
encrypted (e.g., using WPA2, as the packet sizes would remain observable).
CVE-2022-1318 has been assigned to this vulnerability. A CVSS v3 base score of
6.2 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:N/UI:N/S:U/
C:H/I:N/A:N ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities
o COUNTRIES/AREAS DEPLOYED: Australia
o COMPANY HEADQUARTERS LOCATION: United States
3.4 RESEARCHER
Jacob Thompson of Flinders University, Dr. Paul Gardner-Stephen of Flinders
University and DEWC Systems, and Dr. Samuel Chenoweth of Defence Science and
Technology Group reported these vulnerabilities to Carrier.
4. MITIGATIONS
Carrier recommends users upgrade to Version 4000-12 or later, which is the
latest supported version at the time of this publication. Please contact the
Hills
distributor to acquire the firmware update.
More information on this issue can be found in Carrier product security
advisory CARR-PSA-002-1121 .
CISA recommends users take defensive measures to minimize the risk of
exploitation of these vulnerabilities. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure 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 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 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 these vulnerabilities. These
vulnerabilities are 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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