SSA-850560: Use of 4-Digit PIN in SENTRON PAC3200 Devices Key Information from the Webpage: 1. Publication Date: - 2024-10-08 2. Last Update: - 2024-10-08 3. Current Version: - V1.0 4. CVSS v3.1 Base Score: - 9.8 5. CVSS v4.0 Base Score: - 9.3 6. Summary: - SENTRON PAC3200 only provides a 4-digit PIN to protect from administrative access via Modbus TCP interface. Attackers with access to the Modbus TCP interface could easily bypass this protection by brute-force attacks or by monitoring the Modbus cleartext communication. 7. Affected Products and Solution: - Affected Product and Versions: - SENTRON 7KM PAC3200 - All versions affected by CVE-2024-41798 - Remediation: - Currently no fix is planned. - Consider the PIN as protection against unauthorized operation (i.e., protection against inadvertent operating errors), not as protection against malicious access attempts, such as through brute-force attacks; for details see the FAQ article at https://support.industry.siemens.com/cs/ww/en/view/109975235/ 8. Workarounds and Mitigations: - Product-specific remediations or mitigations can be found in the section "Affected Products and Solution." - Please follow the General Security Recommendations. 9. General Security Recommendations: - As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. - In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. - Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity 10. Product Description: 11. Vulnerability Description: - This chapter describes all vulnerabilities (CVE-IDs) addressed in this security advisory. Wherever applicable, it also documents the product-specific impact of the individual vulnerabilities. 12. Acknowledgments: - Siemens thanks the following party for its efforts: - Michael Messner and Benedikt Kühne from Siemens Energy for reporting the vulnerability 13. Additional Information: - The successor product SENTRON 7KM PAC3220 provides an additional hardware switch, that disables administrative write access; only read access is possible from remote. Additionally an extended protection against brute-force attacks is implemented. - For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories 14. History Data: - V1.0 (2024-10-08): Publication date 15. Terms of Use: - Siemens Security Advisories are subject to the terms and conditions contained in Siemens' underlying license terms or other applicable agreements previously agreed to with Siemens (hereinafter "License Terms"). To the extent applicable to information, software or documentation made available in or through a Siemens Security Advisory, the Terms of Use of Siemens' Global Website (https://www.siemens.com/terms_of_use, hereinafter "Terms of Use"), in particular Sections 8-10 of the Terms of Use, shall apply additionally. In case of conflicts, the License Terms shall prevail over the Terms of Use.