{
"document": {
"acknowledgments": [
{
"organization": "Siemens ProductCERT",
"summary": "reporting these vulnerabilities to CISA."
},
{
"names": [
"Sergey Temnikov"
],
"organization": "Kaspersky Lab ICS CERT",
"summary": "reporting the vulnerabilities"
}
],
"category": "Siemens Security Advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Disclosure is not limited",
"tlp": {
"label": "WHITE",
"url": "https://us-cert.cisa.gov/tlp/"
}
},
"notes": [
{
"category": "summary",
"text": "Various industrial products use the Discovery Service of the OPC UA protocol stack by the OPC foundation https://github.com/OPCFoundation/UA-.NETStandard and could therefore be affected by the remote resource consumption attacks (CVE-2017-12069).",
"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.\n\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 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-535640: Vulnerability in Industrial Products - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-535640.json"
},
{
"category": "self",
"summary": "SSA-535640: Vulnerability in Industrial Products - TXT Version",
"url": "https://cert-portal.siemens.com/productcert/txt/ssa-535640.txt"
},
{
"category": "self",
"summary": "SSA-535640: Vulnerability in Industrial Products - PDF Version",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-535640.pdf"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-17-243-01 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2017/icsa-17-243-01.json"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-17-243-01 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-17-243-01"
},
{
"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 OPC UA Protocol Stack Discovery Service (Update E)",
"tracking": {
"current_release_date": "2022-04-12T00:00:00.000000Z",
"generator": {
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-17-243-01",
"initial_release_date": "2017-08-30T00:00:00.000000Z",
"revision_history": [
{
"date": "2017-08-30T00:00:00.000000Z",
"legacy_version": "1.0",
"number": "1",
"summary": "Publication Date"
},
{
"date": "2017-10-02T00:00:00.000000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Clarified \"Affected Products\""
},
{
"date": "2017-11-17T00:00:00.000000Z",
"legacy_version": "1.2",
"number": "3",
"summary": "Added fix for SIMATIC IT Production Suite"
},
{
"date": "2019-01-08T00:00:00.000000Z",
"legacy_version": "1.3",
"number": "4",
"summary": "Added fix for SIMATIC NET PC Software"
},
{
"date": "2020-08-11T00:00:00.000000Z",
"legacy_version": "1.4",
"number": "5",
"summary": "Updated information regarding SIMATIC NET PC Software"
},
{
"date": "2022-04-12T00:00:00.000000Z",
"legacy_version": "1.5",
"number": "6",
"summary": "Added solution for SIMATIC NET PC Software V14 and clarified affected versions; Clarified no remediation planned"
}
],
"status": "final",
"version": "6"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": ">=V6.5_and_<V7.1",
"product": {
"name": "SIMATIC IT Production Suite",
"product_id": "CSAFPID-0001"
}
}
],
"category": "product_name",
"name": "SIMATIC IT Production Suite"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V14_SP1_Update_14",
"product": {
"name": "SIMATIC NET PC Software V14",
"product_id": "CSAFPID-0002"
}
}
],
"category": "product_name",
"name": "SIMATIC NET PC Software V14"
},
{
"branches": [
{
"category": "product_version_range",
"name": "8.0|8.1",
"product": {
"name": "SIMATIC PCS 7",
"product_id": "CSAFPID-0003"
}
}
],
"category": "product_name",
"name": "SIMATIC PCS 7"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V7.2",
"product": {
"name": "SIMATIC WinCC",
"product_id": "CSAFPID-0004"
}
}
],
"category": "product_name",
"name": "SIMATIC WinCC"
},
{
"branches": [
{
"category": "product_version_range",
"name": "vers:all/*",
"product": {
"name": "SIMATIC WinCC Runtime Professional V13",
"product_id": "CSAFPID-0005"
}
}
],
"category": "product_name",
"name": "SIMATIC WinCC Runtime Professional V13"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V14_SP1",
"product": {
"name": "SIMATIC WinCC Runtime Professional V14",
"product_id": "CSAFPID-0006"
}
}
],
"category": "product_name",
"name": "SIMATIC WinCC Runtime Professional V14"
}
],
"category": "vendor",
"name": "Siemens"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2017-12069",
"cwe": {
"id": "CWE-611",
"name": "Improper Restriction of XML External Entity Reference"
},
"notes": [
{
"category": "summary",
"text": "By sending specially crafted packets to the OPC Discovery Server at port 4840/tcp, an attacker might cause the system to access various resources chosen by the attacker. To execute the attack, the attacker must have network access to the affected devices.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006"
]
},
"references": [
{
"summary": "CVE-2017-12069 - SIMATIC NET PC Software V14",
"url": "https://support.industry.siemens.com/cs/ww/en/view/109807351/"
},
{
"summary": "CVE-2017-12069 - SIMATIC WinCC Runtime Professional V14",
"url": "https://support.industry.siemens.com/cs/ww/en/view/109746276"
},
{
"summary": "CVE-2017-12069 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2017-12069.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V7.1 or later version",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "vendor_fix",
"details": "Update to V14 SP1 Update 14 or later version",
"product_ids": [
"CSAFPID-0002"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109807351/"
},
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005"
]
},
{
"category": "vendor_fix",
"details": "Update to V14 SP1 or later version",
"product_ids": [
"CSAFPID-0006"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109746276"
},
{
"category": "mitigation",
"details": "Turn off the Discovery Service after commissioning or block it on the local firewall: https://support.industry.siemens.com/cs/ww/en/view/109749461",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006"
]
},
{
"category": "mitigation",
"details": "Use VPN for protecting network communication between cells",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 8.2,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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"
]
}
],
"title": "CVE-2017-12069"
}
]
}