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AUSCERT External Security Bulletin Redistribution
ESB-2022.6567.2
Advisory (icsa-22-347-03) Contec CONPROSSYS HMI System (CHS)
20 January 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: ONPROSYS HMI System (CHS)
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-44456
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-347-03
Comment: CVSS (Max): 10.0 CVE-2022-44456 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Revision History: January 20 2023: Vendor updated the advisory
December 16 2022: Initial Release
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ICS Advisory (ICSA-22-347-03)
Contec CONPROSYS HMI System (CHS) Update A
Original release date: January 17, 2023 | Last revised: January 19, 2023
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 10.0
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: Contec
o Equipment: CONPROSYS HMI System (CHS)
o Vulnerability: OS Command Injection, Use of Default Credentials, Use of
Password Hash Instead of Password for Authentication, Cross-site Scripting,
Improper Access Control
2. UPDATE OR REPOSTED INFORMATION
This updated advisory is a follow-up to the original advisory titled
ICSA-22-347-03 Contec CONPROSYS HMI System (CHS) that was published December
13, 2022, on the ICS webpage on cisa.gov/ics.
3. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow a remote attacker
to send specially crafted requests and cause a loss of sensitive information.
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following versions of CONPROSYS HMI System (CHS), are affected:
CVE-2022-44456
o CONPROSYS HMI System (CHS): Ver.3.4.4 and prior
CVE-2023-22331, CVE-2023-22334, CVE-2023-22373, CVE-2023-22339
o CONPROSYS HMI System (CHS): Ver.3.4.5 and prior
4.2 VULNERABILITY OVERVIEW
4.2.1 OS COMMAND INJECTION CWE-78
CONPROSYS HMI System versions 3.4.4 and prior are vulnerable to an OS Command
Injection, which could allow an unauthenticated remote attacker to send
specially crafted requests that could execute commands on the server.
CVE-2022-44456 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/C:H
/I:H/A:H ).
4.2.2 USE OF DEFAULT CREDENTIALS CWE-1392
In CONPROSYS HMI System Ver.3.4.5 and prior, user credential information could
be altered by a remote unauthenticated attacker.
CVE-2023-22331 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:N/
I:H/A:N ).
4.2.3 USE OF PASSWORD HASH INSTEAD OF PASSWORD FOR AUTHENTICATION CWE-836
In CONPROSYS HMI System Ver.3.4.5 and prior, user credentials could be obtained
via a machine-in-the-middle attack.
CVE-2023-22334 has been assigned to this vulnerability. A CVSS v3 base score of
5.3 has been assigned; the CVSS vector string is ( AV:N/AC:H/PR:L/UI:N/S:U/C:H/
I:N/A:N ).
4.2.4 CROSS-SITE SCRIPTING CWE-79
In CONPROSYS HMI System Ver.3.4.5 and prior, an arbitrary script could be
executed on the web browser of the administrative user logging into the
product. This could result in sensitive information being obtained.
CVE-2023-22373 has been assigned to this vulnerability. A CVSS v3 base score of
5.7 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:R/S:U/C:H/
I:N/A:N ).
4.2.5 IMPROPER ACCESS CONTROL CWE-284
In CONPROSYS HMI System Ver.3.4.5 and prior, a remote unauthenticated attacker
could obtain the server certificate, including the private key of the product.
CVE-2023-22339 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been assigned; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/C:H/
I:N/A:N ).
4.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Multiple
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Japan
4.4 RESEARCHER
Floris Hendriks and Jeroen Wijenbergh of Radboud University reported this
vulnerability to Contec.
5. MITIGATIONS
Contec recommends users update to CONPROSYS HMI System (CHS) Ver.3.5.0 or later
.
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 they are not accessible from the Internet .
o Locate control system networks and remote devices behind firewalls and
isolate them from business networks.
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 at cisa.gov/ics . Several CISA products detailing cyber
defense best 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 at cisa.gov/ics in the technical information paper,
ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation
Strategies .
Organizations observing suspected malicious activity should follow established
internal procedures and report 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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