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AUSCERT External Security Bulletin Redistribution
ESB-2022.2275
ICS Advisory (ICSA-22-130-05) AVEVA InTouch Access Anywhere
and Plant SCADA Access Anywhere
11 May 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: AVEVA InTouch Access Anywhere and Plant SCADA Access Anywhere
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2022-1467
Original Bulletin:
https://us-cert.cisa.gov/ics/advisories/icsa-22-130-05
Comment: CVSS (Max): 7.4 CVE-2022-1467 (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
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ICS Advisory (ICSA-22-130-05)
AVEVA InTouch Access Anywhere and Plant SCADA Access Anywhere
Original release date: May 10, 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 7.4
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: AVEVA
o Equipment: AVEVA InTouch Access Anywhere and AVEVA Plant SCADA Access
Anywhere
o Vulnerability: Exposure of Resource to Wrong Sphere
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an authenticated user
to escape from the context of the streamed application into the OS and launch
arbitrary OS commands.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
AVEVA reports this vulnerability affects the following HMI products:
o AVEVA InTouch Access Anywhere: All versions
o AVEVA Plant SCADA Access Anywhere (formerly known as AVEVA Citect Anywhere
and Schneider Electric Citect Anywhere): All versions
3.2 VULNERABILITY OVERVIEW
3.2.1 EXPOSURE OF RESOURCE TO WRONG SPHERE CWE-668
Windows OS can be configured to overlay a "language bar" on top of any
application. When this OS functionality is enabled, the OS language bar UI will
be viewable in the browser alongside the InTouch Access Anywhere and Plant
SCADA Access Anywhere applications. It is possible to manipulate the Windows OS
language bar to launch an OS command prompt, resulting in a context-escape from
application into OS.
CVE-2022-1467 has been assigned to this vulnerability. A CVSS v3 base score of
7.4 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:C/
C:L/I:L/A:L ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Chemical, Critical Manufacturing, Energy,
Food and Agriculture, and Water and Wastewater Systems
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United Kingdom
3.4 RESEARCHER
Giovanni Delvecchio from Aceaspa reported this vulnerability to AVEVA.
4. MITIGATIONS
AVEVA recommends the following mitigations:
o Disable the Windows language bar on the server machine hosting InTouch
Access Anywhere and Plant SCADA Access Anywhere applications unless it is
required.
o Create unique user accounts with minimal privileges dedicated only to
remote access of InTouch Access Anywhere and Plant SCADA Access Anywhere
applications.
o Utilize OS group policy objects (GPOs) to further restrict what those
unique user accounts are allowed to do.
o Restrict access based on Microsoft's recommended block list .
For more information on this vulnerability, including security updates, please
see security bulletin AVEVA-2022-001
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Ensure the least-privilege user principle is followed.
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.
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:
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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