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AUSCERT External Security Bulletin Redistribution
ESB-2019.2903
Advisory (ICSA-19-213-01) Advantech WebAccess HMI Designer
2 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Advantech WebAccess HMI Designer
Publisher: ICS-CERT
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2019-10961
Original Bulletin:
https://www.us-cert.gov/ics/advisories/icsa-19-213-01
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ICS Advisory (ICSA-19-213-01)
Advantech WebAccess HMI Designer
Original release date: August 01, 2019
Legal Notice
All information products included in http://ics-cert.us-cert.gov 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 http://www.us-cert.gov/tlp/ .
1. EXECUTIVE SUMMARY
o CVSS v3 7.8
o ATTENTION : Low skill level to exploit
o Vendor : Advantech
o Equipment : Advantech WebAccess HMI Designer
o Vulnerability : Out-of-bounds Write
2. RISK EVALUATION
Successful exploitation of this vulnerability may allow an attacker to remotely
execute arbitrary code.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Advantech WebAccess HMI Designer, a Human Machine
Interface (HMI) runtime development software, are affected:
o Advantech WebAccess HMI Designer Version 2.1.9.23 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 OUT-OF-BOUNDS WRITE CWE-787
Processing specially crafted MCR files lacking proper validation of user
supplied data may cause the system to write outside the intended buffer area,
allowing remote code execution.
CVE-2019-10961 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:N/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
Mat Powell of Trend Micro's Zero Day Initiative (ZDI) reported this
vulnerability to CISA.
4. MITIGATIONS
Advantech has released Version 2.1.9.31 of WebAccess HMI Designer to address
the reported vulnerability. Users can download the latest version of WebAccess
HMI Designer .
CISA 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.
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 us-cert.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 us-cert.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 this vulnerability. This
vulnerability is not exploitable remotely.
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