Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2023.3083
ICS Advisory | ICSA-23-150-01 Advantech WebAccess/SCADA
31 May 2023
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Advantech WebAccess/SCADA
Publisher: ICS-CERT
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2023-2866
Original Bulletin:
https://www.cisa.gov/news-events/ics-advisories/icsa-23-150-01
Comment: CVSS (Max): 7.3 CVE-2023-2866 (CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: ICS-CERT
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- --------------------------BEGIN INCLUDED TEXT--------------------
ICS Advisory (ICSA-23-150-01)
Advantech WebAccess/SCADA
Release Date
May 30, 2023
1. EXECUTIVE SUMMARY
o CVSS v3 7.3
o ATTENTION: Low attack complexity
o Vendor: Advantech
o Equipment: WebAccess/SCADA
o Vulnerabilities: Insufficient Type Distinction
2. RISK EVALUATION
Successful exploitation of this vulnerability could allow an attacker full
control over the supervisory control and data acquisition (SCADA) server.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Advantech reports this vulnerability affect the following WebAccess/SCADA
product:
o WebAccess/SCADA: version 8.4.5
3.2 VULNERABILITY OVERVIEW
3.2.1 INSUFFICIENT TYPE DISTINCTION CWE-351
If an attacker can trick an authenticated user into loading a maliciously
crafted .zip file onto Advantech WebAccess version 8.4.5, a web shell could be
used to give the attacker full control of the SCADA server.
CVE-2023-2866 has been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been calculated; the CVSS vector string is ( AV:L/AC:L/PR:L/UI:R/S:U/
C:H/I:H/A:H ).
3.3 BACKGROUND
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and
Wastewater Systems
o COUNTRIES/AREAS DEPLOYED: East Asia, Europe, United States
o COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Marlon Luis Petry reported this vulnerability to CISA.
4. MITIGATIONS
Advantech recommends users locate and delete the "WADashboardSetup.msi" file to
avoid this issue.
If users wish to remedy this problem in version 8.4.5, they can uninstall
"WebAccess Dashboard" from the control panel. Delete all the files:
1. \Inetpub\wwwroot\broadweb\WADashboard
2. \WebAccess\Node\WADashboardSetup.msi
Advantech released a new version V9.1.4 to address the problem by not including
these files.
CISA recommends users take the following measures to protect themselves from
social engineering attacks:
o Do not click web links or open attachments in unsolicited 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.
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. This
vulnerability is not exploitable remotely.
Related Advisories
May 25, 2023
ICS Advisory | ICSA-23-145-01
Moxa MXsecurity Series
May 23, 2023
ICS Advisory | ICSA-23-143-02
Hitachi Energy's RTU500 Series Product
May 23, 2023
ICS Advisory | ICSA-23-143-03
Mitsubishi Electric MELSEC Series CPU module
May 23, 2023
ICS Advisory | ICSA-23-143-01
Hitachi Energy's AFS65x, AFS67x, AFR67x and AFF66x Products
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: https://auscert.org.au/gpg-key/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=NiXc
-----END PGP SIGNATURE-----