{
"document": {
"acknowledgments": [
{
"organization": "Siemens ProductCERT",
"summary": "reporting these vulnerabilities to CISA."
}
],
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Disclosure is not limited",
"tlp": {
"label": "WHITE",
"url": "https://us-cert.cisa.gov/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "Two vulnerabilities have been identified in the SIMATIC S7-400 CPU family\nthat could allow an attacker to cause a denial of service condition. In order\nto exploit the vulnerabilities, an attacker must have access to the affected\ndevices on port 102/tcp via Ethernet, PROFIBUS or Multi Point Interfaces\n(MPI). \n\nSiemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends specific countermeasures for products where updates 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: \nhttps://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": "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.",
"title": "Terms of Use"
},
{
"category": "legal_disclaimer",
"text": "All information products included in https://us-cert.cisa.gov/ics are provided \"as is\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.",
"title": "Legal Notice"
},
{
"category": "other",
"text": "This CISA CSAF advisory was converted from Siemens ProductCERT's CSAF advisory.",
"title": "Advisory Conversion Disclaimer"
},
{
"category": "other",
"text": "Multiple",
"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 this vulnerability.",
"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-113131: Denial of Service Vulnerabilities in SIMATIC S7-400 CPUs - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-113131.json"
},
{
"category": "self",
"summary": "SSA-113131: Denial of Service Vulnerabilities in SIMATIC S7-400 CPUs - HTML Version",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-113131.html"
},
{
"category": "self",
"summary": "SSA-113131: Denial of Service Vulnerabilities in SIMATIC S7-400 CPUs - PDF Version",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-113131.pdf"
},
{
"category": "self",
"summary": "SSA-113131: Denial of Service Vulnerabilities in SIMATIC S7-400 CPUs - TXT Version",
"url": "https://cert-portal.siemens.com/productcert/txt/ssa-113131.txt"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-18-317-02 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2018/icsa-18-317-02.json"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-18-317-02 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-18-317-02"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/uscert/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://us-cert.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/uscert/ics/tips/ICS-TIP-12-146-01B"
}
],
"title": "Siemens S7-400 CPUs (Update B)",
"tracking": {
"current_release_date": "2023-05-09T00:00:00.000000Z",
"generator": {
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-18-317-02",
"initial_release_date": "2018-11-13T00:00:00.000000Z",
"revision_history": [
{
"date": "2018-11-13T00:00:00.000000Z",
"legacy_version": "1.0",
"number": "1",
"summary": "Publication Date"
},
{
"date": "2019-05-14T00:00:00.000000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Updated acknowledgements and added solution for S7-400H V6"
},
{
"date": "2020-02-10T00:00:00.000000Z",
"legacy_version": "1.2",
"number": "3",
"summary": "SIPLUS devices now explicitly mentioned in the list of affected products"
},
{
"date": "2022-08-09T00:00:00.000000Z",
"legacy_version": "1.3",
"number": "4",
"summary": "No fix planned for SIMATIC S7-400 PN/DP V6 and below CPU family, and for SIMATIC S7-400 H V4.5 and below CPU family"
},
{
"date": "2023-01-10T00:00:00.000000Z",
"legacy_version": "1.4",
"number": "5",
"summary": "No fix planned for SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants)"
},
{
"date": "2023-05-09T00:00:00.000000Z",
"legacy_version": "1.5",
"number": "6",
"summary": "Expanded SIMATIC S7-400 V7 CPU family (incl. SIPLUS variants) to individual products and MLFBs; added fix for SIMATIC S7-400 PN/DP V7 CPUs; clarified that no fix is planned for other S7-400 V7 CPUs"
}
],
"status": "final",
"version": "6"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:all/*",
"product": {
"name": " SIMATIC S7-400 CPU 412-1 DP V7 (6ES7412-1XJ07-0AB0)",
"product_id": "CSAFPID-0001",
"product_identification_helper": {
"model_numbers": [
"6ES7412-1XJ07-0AB0"
]
}
}
}
],
"category": "product_name",
"name": " SIMATIC S7-400 CPU 412-1 DP V7 (6ES7412-1XJ07-0AB0)"
},
{
"branches": [
{
"category": "product_version_range",
"name": "vers:all/*",
"product": {
"name": " SIMATIC S7-400 CPU 412-2 DP V7 (6ES7412-2XK07-0AB0)",
"product_id": "CSAFPID-0002",
"product_identification_helper": {
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]
}
}
}
],
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},
{
"branches": [
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"name": "vers:all/*",
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"product_id": "CSAFPID-0003",
"product_identification_helper": {
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}
}
}
],
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},
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"product_id": "CSAFPID-0004",
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}
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}
],
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},
{
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"product_id": "CSAFPID-0005",
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}
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}
],
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},
{
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},
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{
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},
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"branches": [
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"product_id": "CSAFPID-0014"
}
}
],
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},
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"branches": [
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}
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},
{
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}
}
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},
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}
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},
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},
{
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"product_id": "CSAFPID-0019",
"product_identification_helper": {
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}
}
}
],
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},
{
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{
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"name": "vers:all/*",
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"model_numbers": [
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}
}
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},
{
"branches": [
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"category": "product_version_range",
"name": "vers:all/*",
"product": {
"name": "SIPLUS S7-400 CPU 417-4 V7 (6AG1417-4XT07-7AB0)",
"product_id": "CSAFPID-0021",
"product_identification_helper": {
"model_numbers": [
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}
}
}
],
"category": "product_name",
"name": "SIPLUS S7-400 CPU 417-4 V7 (6AG1417-4XT07-7AB0)"
}
],
"category": "vendor",
"name": "Siemens"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2018-16556",
"cwe": {
"id": "CWE-20",
"name": "Improper Input Validation"
},
"notes": [
{
"category": "summary",
"text": "Specially crafted packets sent to port 102/tcp via Ethernet interface, via\r\nPROFIBUS, or via Multi Point Interfaces (MPI) could cause the affected\r\ndevices to go into defect mode. Manual reboot is required to resume normal\r\noperation.\r\n\r\nSuccessful exploitation requires an attacker to be able to send specially\r\ncrafted packets to port 102/tcp via Ethernet interface, via PROFIBUS or Multi\r\nPoint Interfaces (MPI). No user interaction and no user privileges are\r\nrequired to exploit the security vulnerability. The vulnerability could allow\r\ncausing a denial of service condition of the core functionality of the CPU,\r\ncompromising the availability of the system.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
"remediations": [
{
"category": "mitigation",
"details": "Restrict network access to affected devices; restrict network access to port 102/tcp for Ethernet interfaces",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
{
"category": "mitigation",
"details": "Activate Field Interface Security in PCS 7 V9.0, and use a SIMATIC/SIPLUS CP443-1 Adv. to communicate with ES/OS",
"product_ids": [
"CSAFPID-0017"
]
},
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0010",
"CSAFPID-0012",
"CSAFPID-0014",
"CSAFPID-0016",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
{
"category": "vendor_fix",
"details": "Update to V7.0.3 or later version",
"product_ids": [
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0009",
"CSAFPID-0011",
"CSAFPID-0013",
"CSAFPID-0018",
"CSAFPID-0019"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109752685/"
},
{
"category": "vendor_fix",
"details": "Update to V6.0.9 or later version",
"product_ids": [
"CSAFPID-0015"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109474550/"
},
{
"category": "vendor_fix",
"details": "Update to V8.2.1 or later version",
"product_ids": [
"CSAFPID-0017"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109476571/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
}
],
"title": "CVE-2018-16556"
},
{
"cve": "CVE-2018-16557",
"cwe": {
"id": "CWE-347",
"name": "Improper Verification of Cryptographic Signature"
},
"notes": [
{
"category": "summary",
"text": "Sending of specially crafted packets to port 102/tcp via Ethernet interface\r\nvia PROFIBUS or Multi Point Interfaces (MPI) could cause a denial of service\r\ncondition on affected devices. Flashing with a firmware image may be required\r\nto recover the CPU.\r\n\r\nSuccessful exploitation requires an attacker to have network access to port\r\n102/tcp via Ethernet interface or to be able to send messages via PROFIBUS or\r\nMulti Point Interfaces (MPI) to the device. No user interaction is required.\r\nIf no access protection is configured, no privileges are required to exploit\r\nthe security vulnerability. The vulnerability could allow causing a\r\ndenial of service condition of the core functionality of the CPU,\r\ncompromising the availability of the system.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
"remediations": [
{
"category": "mitigation",
"details": "CVE-2018-16557: Configure protection level 3 (read/write protection)",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
{
"category": "mitigation",
"details": "Restrict network access to affected devices; restrict network access to port 102/tcp for Ethernet interfaces",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
{
"category": "mitigation",
"details": "Activate Field Interface Security in PCS 7 V9.0, and use a SIMATIC/SIPLUS CP443-1 Adv. to communicate with ES/OS",
"product_ids": [
"CSAFPID-0017"
]
},
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0010",
"CSAFPID-0012",
"CSAFPID-0014",
"CSAFPID-0016",
"CSAFPID-0020",
"CSAFPID-0021"
]
},
{
"category": "vendor_fix",
"details": "Update to V7.0.3 or later version",
"product_ids": [
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0009",
"CSAFPID-0011",
"CSAFPID-0013",
"CSAFPID-0018",
"CSAFPID-0019"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109752685/"
},
{
"category": "vendor_fix",
"details": "Update to V6.0.9 or later version",
"product_ids": [
"CSAFPID-0015"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109474550/"
},
{
"category": "vendor_fix",
"details": "Update to V8.2.1 or later version",
"product_ids": [
"CSAFPID-0017"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109476571/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 8.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009",
"CSAFPID-0010",
"CSAFPID-0011",
"CSAFPID-0012",
"CSAFPID-0013",
"CSAFPID-0014",
"CSAFPID-0015",
"CSAFPID-0016",
"CSAFPID-0017",
"CSAFPID-0018",
"CSAFPID-0019",
"CSAFPID-0020",
"CSAFPID-0021"
]
}
],
"title": "CVE-2018-16557"
}
]
}