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AUSCERT External Security Bulletin Redistribution
ESB-2022.0075
Advisory (icsa-21-355-01) mySCADA myPRO
7 January 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: mySCADA myPRO
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-44453 CVE-2021-43989 CVE-2021-43987
CVE-2021-43985 CVE-2021-43984 CVE-2021-43981
CVE-2021-23198 CVE-2021-22657
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-21-355-01
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ICS Advisory (ICSA-21-355-01)
mySCADA myPRO
Original release date: December 21, 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 10.0
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: mySCADA
o Equipment: myPRO
o Vulnerabilities: Authentication Bypass Using an Alternate Path or Channel,
Use of Password Hash with Insufficient Computational Effort, Hidden
Functionality, OS Command Injection
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
completely compromise the products.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of myPRO, an HMI/SCADA system, are affected:
o myPRO: Versions 8.20.0 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 AUTHENTICATION BYPASS USING AN ALTERNATE PATH OR CHANNEL CWE-288
An unauthenticated remote attacker can access the application without any form
of authentication or authorization.
CVE-2021-43985 has been assigned to this vulnerability. A CVSS v3 base score of
9.1 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:N ).
3.2.2 USE OF PASSWORD HASH WITH INSUFFICIENT COMPUTATIONAL EFFORT CWE-916
The affected product stores passwords using MD5, which may allow an attacker to
crack the previously retrieved password hashes.
CVE-2021-43989 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/
C:H/I:N/A:N ).
3.2.3 HIDDEN FUNCTIONALITY CWE-912
An additional, nondocumented administrative account exists in the affected
product that is not exposed through the web interface, which cannot be deleted
or changed through the regular web interface.
CVE-2021-43987 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
C:H/I:H/A:H ).
3.2.4 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS
COMMAND INJECTION') CWE-78
The affected product has a vulnerable debug interface which includes a ping
utility, which may allow an attacker to inject arbitrary operating system
commands.
CVE-2021-44453 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H ).
3.2.5 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS
COMMAND INJECTION') CWE-78
The affected product has a feature where the API password can be specified,
which may allow an attacker to inject arbitrary operating system commands
through a specific parameter.
CVE-2021-22657 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H ).
3.2.6 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS
COMMAND INJECTION') CWE-78
The affected product has a feature where the password can be specified, which
may allow an attacker to inject arbitrary operating system commands through a
specific parameter.
CVE-2021-23198 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H ).
3.2.7 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS
COMMAND INJECTION') CWE-78
The affected product has a feature to send emails, which may allow an attacker
to inject arbitrary operating system commands through a specific parameter.
CVE-2021-43981 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H ).
3.2.8 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS
COMMAND INJECTION') CWE-78
The affected product has a feature where the firmware can be updated, which may
allow an attacker to inject arbitrary operating system commands through a
specific parameter.
CVE-2021-43984 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Energy, Food and Agriculture,
Transportation Systems, Water and Wastewater Systems
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Czech Republic
3.4 RESEARCHER
Michael Heinzl reported these vulnerabilities to CISA.
4. MITIGATIONS
mySCADA recommends users upgrade to Version 8.22.0 or higher . For more
information, contact mySCADA technical support .
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.
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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