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AUSCERT External Security Bulletin Redistribution
Advisory (icsa-20-210-02) Softing Industrial Automation OPC
29 July 2020
AusCERT Security Bulletin Summary
Product: Softing Industrial Automation OPC
Operating System: Network Appliance
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2020-14524 CVE-2020-14522
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ICS Advisory (ICSA-20-210-02)
Softing Industrial Automation OPC
Original release date: July 28, 2020
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1. EXECUTIVE SUMMARY
o CVSS v3 9.8
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Softing Industrial Automation, GmbH
o Equipment: OPC
o Vulnerabilities: Heap-based Buffer Overflow, Uncontrolled Resource
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could crash the device being
accessed. A buffer-overflow condition may also allow remote code execution.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of OPC are affected:
o All versions prior to the latest build of Version 4.47.0
3.2 VULNERABILITY OVERVIEW
3.2.1 HEAP-BASED BUFFER OVERFLOW CWE-122
The affected product is vulnerable to a heap-based buffer overflow, which may
allow an attacker to remotely execute arbitrary code.
CVE-2020-14524 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/
3.2.2 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
The affected product is vulnerable to uncontrolled resource consumption, which
may allow an attacker to cause a denial-of-service condition.
CVE-2020-14522 has been assigned to this vulnerability. A CVSS v3 base score of
7.5 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: Germany
Uri Katz of Claroty reported these vulnerabilities to CISA.
Softing Industrial Automation has released an update to mitigate the reported
vulnerabilities. The most up-to-date release at the time of this CISA advisory
can be found on the Softing Industrial Automation website .
CISA recommends users take defensive measures to minimize the risk of
exploitation of this vulnerability. Specifically, users should:
o Minimize network exposure for all control system devices and/or systems,
and ensure that 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 that VPNs may have vulnerabilities and should
be updated to the most current version available. Also recognize that VPN
is only as secure as the 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 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
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
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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