{
"document": {
"acknowledgments": [
{
"organization": "Siemens ProductCERT",
"summary": "reporting this vulnerability to CISA."
}
],
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Disclosure is not limited",
"tlp": {
"label": "WHITE",
"url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "The OPC UA implementations (ANSI C and C++) as used in several SIMATIC products contain a denial of service vulnerability that could allow an unauthenticated remote attacker to create a denial of service condition by sending a specially crafted certificate.\n\nSiemens has released new versions for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where fixes are not, or not yet available.",
"title": "Summary"
},
{
"category": "general",
"text": "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.\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
"title": "General Recommendations"
},
{
"category": "general",
"text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
"title": "Additional Resources"
},
{
"category": "legal_disclaimer",
"text": "The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.",
"title": "Terms of Use"
},
{
"category": "legal_disclaimer",
"text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).",
"title": "Legal Notice and Terms of Use"
},
{
"category": "other",
"text": "This ICSA is a verbatim republication of Siemens ProductCERT SSA-711309 from a direct conversion of the vendor's Common Security Advisory Framework (CSAF) advisory. This is republished to CISA's website as a means of increasing visibility and is provided \"as-is\" for informational purposes only. CISA is not responsible for the editorial or technical accuracy of republished advisories and provides no warranties of any kind regarding any information contained within this advisory. Further, CISA does not endorse any commercial product or service. Please contact Siemens ProductCERT directly for any questions regarding this advisory.",
"title": "Advisory Conversion Disclaimer"
},
{
"category": "other",
"text": "Critical Manufacturing, Transportation Systems, Energy, Healthcare and Public Health, Financial Services, Government Services and Facilities",
"title": "Critical infrastructure sectors"
},
{
"category": "other",
"text": "Worldwide",
"title": "Countries/areas deployed"
},
{
"category": "other",
"text": "Germany",
"title": "Company headquarters location"
},
{
"category": "general",
"text": "CISA recommends users take defensive measures to minimize the exploitation risk of these vulnerabilities.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Locate control system networks and remote devices behind firewalls and isolate them from business networks.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "When remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most recent version available. Also recognize VPN is only as secure as its connected devices.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.",
"title": "Recommended Practices"
}
],
"publisher": {
"category": "other",
"contact_details": "central@cisa.dhs.gov",
"name": "CISA",
"namespace": "https://www.cisa.gov/"
},
"references": [
{
"category": "self",
"summary": "SSA-711309: Denial of Service Vulnerability in the OPC UA Implementations of SIMATIC Products - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-711309.json"
},
{
"category": "self",
"summary": "SSA-711309: Denial of Service Vulnerability in the OPC UA Implementations of SIMATIC Products - HTML Version",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-711309.html"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-23-257-01 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2023/icsa-23-257-01.json"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-23-257-01 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-23-257-01"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/topics/industrial-control-systems"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b"
}
],
"title": "Siemens SIMATIC, SIPLUS Products",
"tracking": {
"current_release_date": "2025-11-11T00:00:00.000000Z",
"generator": {
"date": "2025-11-17T18:18:43.759926Z",
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-23-257-01",
"initial_release_date": "2023-09-12T00:00:00.000000Z",
"revision_history": [
{
"date": "2023-09-12T00:00:00.000000Z",
"legacy_version": "1.0",
"number": "1",
"summary": "Publication Date"
},
{
"date": "2023-10-10T00:00:00.000000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Added additional vulnerable products SIMATIC WinCC OA V3.17, SIMATIC WinCC OA V3.18, and SIMATIC WinCC OA V3.19; clarified that both ANSI C and C++ implementations are affected"
},
{
"date": "2023-11-14T00:00:00.000000Z",
"legacy_version": "1.2",
"number": "3",
"summary": "Added additional vulnerable products SIMATIC BRAUMAT / SISTAR"
},
{
"date": "2023-12-12T00:00:00.000000Z",
"legacy_version": "1.3",
"number": "4",
"summary": "Added SIMATIC Comfort/Mobile RT, SIMATIC IPC DiagMonitor, SIMATIC WinCC Unified OPC UA Client/Server, and SIMATIC PCS neo as affected products; removed unaffected devices: 6ES7513-1RL00-0AB0, 6ES7513-1RM03-0AB0, 6ES7515-2RM00-0AB0, 6ES7515-2RN03-0AB0, 6AG1515-2RM00-7AB0, 6AG2515-2RM00-4AB0, 6ES7517-3HP00-0AB0, 6AG1517-3HP00-4AB0, 6ES7518-4JP00-0AB0, 6AG1518-4JP00-4AB0; added fix for SIMATIC S7-PLCSIM Advanced"
},
{
"date": "2024-01-09T00:00:00.000000Z",
"legacy_version": "1.4",
"number": "5",
"summary": "No fix planned for SIMATIC IPC DiagMonitor"
},
{
"date": "2024-02-13T00:00:00.000000Z",
"legacy_version": "1.5",
"number": "6",
"summary": "Added fix for SIMATIC WinCC Unified OPC UA Client/Server; Added SIMATIC PCS 7 V9.1 as affected; Added specific mitigation measure for CVE-2023-28831 (disable OPC UA)"
},
{
"date": "2024-03-12T00:00:00.000000Z",
"legacy_version": "1.6",
"number": "7",
"summary": "Removed unaffected device SIMATIC S7-1200 CPU family (incl. SIPLUS variants), added SIMATIC WinCC (Classic and Runtime Professional) and Totally Integrated Automation Portal to the list of affected devices, no fix planned for SIMATIC PCS 7 V9.1"
},
{
"date": "2024-04-09T00:00:00.000000Z",
"legacy_version": "1.7",
"number": "8",
"summary": "Added SIMATIC NET PC Software as affected product; added fix for SIMATIC NET PC Software V17, V18; added fix for SIMATIC S7-1500 Software Controller V3; removed unaffected product TIA Portal"
},
{
"date": "2024-05-14T00:00:00.000000Z",
"legacy_version": "1.8",
"number": "9",
"summary": "Added fix for SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V30"
},
{
"date": "2024-06-11T00:00:00.000000Z",
"legacy_version": "1.9",
"number": "10",
"summary": "Added fix for SIMATIC WinCC Runtime Professional V19"
},
{
"date": "2024-07-09T00:00:00.000000Z",
"legacy_version": "2.0",
"number": "11",
"summary": "Added fix for SIMATIC WinCC V8.0"
},
{
"date": "2024-10-08T00:00:00.000000Z",
"legacy_version": "2.1",
"number": "12",
"summary": "No fix planned for SIMATIC PCS neo V4.0; removed SIMATIC PCS neo V4.1 as not affected"
},
{
"date": "2024-12-10T00:00:00.000000Z",
"legacy_version": "2.2",
"number": "13",
"summary": "No fix planned for SIMATIC Comfort/Mobile RT"
},
{
"date": "2025-01-14T00:00:00.000000Z",
"legacy_version": "2.3",
"number": "14",
"summary": "Added fix for SIMATIC NET PC Software V16"
},
{
"date": "2025-08-18T00:00:00.000000Z",
"legacy_version": "2.4",
"number": "15",
"summary": "Added fix for SIMATIC WinCC V7.5 and SIMATIC PCS 7 V9.1"
},
{
"date": "2025-11-11T00:00:00.000000Z",
"legacy_version": "2.5",
"number": "16",
"summary": "Updated fix for SIMATIC PCS 7 V9.1"
}
],
"status": "final",
"version": "16"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "=3.0.1|<3.0.3",
"product": {
"name": "SIMATIC Drive Controller CPU 1504D TF (6ES7615-4DF10-0AB0)",
"product_id": "CSAFPID-0006",
"product_identification_helper": {
"model_numbers": [
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]
}
}
}
],
"category": "product_name",
"name": "SIMATIC Drive Controller CPU 1504D TF (6ES7615-4DF10-0AB0)"
},
{
"branches": [
{
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"name": "vers:intdot/<2.9.7",
"product": {
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"product_id": "CSAFPID-0007",
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}
},
{
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"product": {
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"product_id": "CSAFPID-0008",
"product_identification_helper": {
"model_numbers": [
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}
}
}
],
"category": "product_name",
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},
{
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"name": "vers:intdot/<2.9.7",
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"name": "SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SJ01-0AB0)",
"product_id": "CSAFPID-0009",
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},
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},
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"name": "SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DJ01-0AB0)",
"product_id": "CSAFPID-0011",
"product_identification_helper": {
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"product_identification_helper": {
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