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1. EXECUTIVE SUMMARY
- CVSS v3 7.8
- ATTENTION: Low attack complexity
- Vendor: Horner Automation
- Equipment: Cscape Csfont
- Vulnerabilities: Out-of-bounds Write, Out-of-bounds Read, Heap-based Buffer Overflow
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to execute arbitrary code by opening a malicious file.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Horner Automation Cscape PLC management software are affected:
- Horner Automation Cscape Csfont: Versions 9.90 SP5 (v9.90.196) and prior
3.2 VULNERABILITY OVERVIEW
The affected product is vulnerable to an out-of-bounds write, which may allow an attacker to execute arbitrary code.
The affected product is vulnerable to an out-of-bounds write via uninitialized pointer, which may allow an attacker to execute arbitrary code.
The affected product is vulnerable to an out-of-bounds read via uninitialized pointer, which may allow an attacker to execute arbitrary code.
The affected product is vulnerable to a heap-based buffer overflow via uninitialized pointer, which may allow an attacker to execute arbitrary code.
- CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: United States
Michael Heinzl reported these vulnerabilities to CISA.
Horner Automation recommends affected users update to the latest version of Cscape Csfont Version 9.90 SP6.
Users with questions regarding their specific software installations should contact their local Horner Automation service support team at either:
- email@example.com (+1-317-916-4274), or
- firstname.lastname@example.org (+353-(0)21-4321266 ext. 202) outside of the Americas
CISA also 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 cisa.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 cisa.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. These vulnerabilities are not exploitable remotely.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
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