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1. EXECUTIVE SUMMARY
- CVSS v3 9.8
- ATTENTION: Exploitable remotely/low skill level to exploit
- Vendor: Advantech
- Equipment: WebAccess HMI Designer
- Vulnerabilities: Heap-based Buffer Overflow, Out-of-bounds Read, Out-of-bounds Write, Type Confusion, Stack-based Buffer Overflow, Double Free
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to read/modify information, execute arbitrary code, and/or crash the application.
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:
- WebAccess HMI Designer Versions 184.108.40.206 and prior
3.2 VULNERABILITY OVERVIEW
Multiple heap-based buffer overflow vulnerabilities may be exploited by opening specially crafted project files that may overflow the heap, which may allow remote code execution, disclosure/modification of information, or cause the application to crash.
An out-of-bounds read vulnerability may be exploited by processing specially crafted project files, which may allow an attacker to read information.
Processing specially crafted project files lacking proper validation of user supplied data may cause the system to write outside the intended buffer area, which may allow remote code execution, disclosure/modification of information, or cause the application to crash.
Processing specially crafted project files lacking proper validation of user supplied data may cause a type confusion condition, which may allow remote code execution, disclosure/modification of information, or cause the application to crash.
Processing specially crafted project files lacking proper validation of user supplied data may cause a stack-based buffer overflow, which may allow remote code execution, disclosure/modification of information, or cause the application to crash.
3.2.6 DOUBLE FREE CWE-415
A double free vulnerability caused by processing specially crafted project files may allow remote code execution, disclosure/modification of information, or cause the application to crash.
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Water and Wastewater Systems
- COUNTRIES/AREAS DEPLOYED: East Asia, Europe, United States
- COMPANY HEADQUARTERS LOCATION: Taiwan
kimiya and Natnael Samson (@NattiSamson) working with Trend Micro’s Zero Day Initiative reported these vulnerabilities to CISA.
Advantech has released Version 220.127.116.11 of WebAccess HMI Designer to address the reported vulnerabilities. Users can download the latest version of WebAccess HMI Designer.
CISA recommends users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open unsolicited attachments in email messages.
- Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- 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 these vulnerabilities.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
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