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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-22-326-01) AVEVA Edge
23 November 2022
AusCERT Security Bulletin Summary
Product: AVEVA Edge
Operating System: Network Appliance
CVE Names: CVE-2021-42797 CVE-2021-42796 CVE-2021-42794
Revision History: November 23 2022: Fixed formatting in the bulletin
November 23 2022: Initial Release
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ICS Advisory (ICSA-22-326-01)
Original release date: November 22, 2022
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1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION: Exploitable remotely/low attack complexity
o Vendor: AVEVA
o Equipment: Edge
o Vulnerabilities: Uncontrolled Search Path Element, Exposure of Sensitive
Information to an Unauthorized Actor, Uncontrolled Resource Consumption,
Improper Access Control, Windows UNC Share
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
insert malicious DLL files and trick the application into executing code.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of AVEVA Edge, an HMI/SCADA software, are affected:
o AVEVA Edge 2020 R2 SP1
o AVEVA Edge 2020 R2 SP1 w/ HF 2020.2.00.40
o AVEVA Edge 2020 R2 and all prior versions (formerly known as InduSoft Web
3.2 VULNERABILITY OVERVIEW
3.2.1 UNCONTROLLED SEARCH PATH ELEMENT CWE-427
In AVEVA Edge versions R2020 and prior could allow a malicious entity with
access to the file system to achieve arbitrary code execution and privilege
escalation by tricking the AVEVA Edge InstallShield package to load an unsafe
DLL. This attack is only possible during the installation or when performing an
install or repair operation.
CVE-2016-2542 has been assigned to this vulnerability. A CVSS v3 base score of
7.8 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:N/S:U/
3.2.2 EXPOSURE OF SENSITIVE INFORMATION TO AN UNAUTHORIZED ACTOR CWE-200
AVEVA Edge versions R2020 and prior could allow internal network scanning and
expose sensitive device information.
CVE-2021-42794 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/
3.2.3 IMPROPER ACCESS CONTROL CWE-284
AVEVA Edge versions R2020 and prior could allow unauthenticated arbitrary
commands to be executed with the security context of the StADOSvr.exe process.
In most instances, this will be a standard-privileged user account under which
the AVEVA Edge runtime was started. It's possible for a high-privileged service
account to have been configured and assigned for running AVEVA Edge runtime.
CVE-2021-42796 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/
3.2.4 PATH TRAVERSAL: '\\UNC\SHARE\NAME\' (WINDOWS UNC SHARE) CWE-40
AVEVA Edge versions R2020 and prior could allow an unauthenticated actor to
trick the AVEVA Edge runtime into disclosing a Windows access token of the user
account configured for accessing external DB resources.
CVE-2021-42797 has been assigned to this vulnerability. A CVSS v3 base score of
8.6 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United Kingdom
Sam Hanson of Dragos reported these vulnerabilities to CISA.
AVEVA recommends organizations evaluate the impact of these vulnerabilities
based on operational environment, architecture, and product implementations.
o Users of AVEV Edge (formerly known as InduSoft Web Studio) up to 2020 R2
SP1 w/ HF 2020.2.00.40 should apply AVEVA Edge 2020 R2 SP2 as soon as
o Restrict access to port TCP/3997
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability these vulnerabilities. Specifically, users
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
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
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 these vulnerabilities.
For any questions related to this report, please contact the CISA at:
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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