{
"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://us-cert.cisa.gov/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "A vulnerability in the underlying third party component OPC UA ANSIC Stack (also called Legacy C-Stack) affects several industrial products. The vulnerability could cause a crash of the component that includes the vulnerable part of the stack.\n\nSiemens has released updates for the affected products and recommends to update to the latest versions.",
"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 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-285795: Denial of Service in OPC-UA in Industrial Products - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-285795.json"
},
{
"category": "self",
"summary": "SSA-285795: Denial of Service in OPC-UA in Industrial Products - HTML Version",
"url": "https://cert-portal.siemens.com/productcert/html/ssa-285795.html"
},
{
"category": "self",
"summary": "SSA-285795: Denial of Service in OPC-UA in Industrial Products - PDF Version",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-285795.pdf"
},
{
"category": "self",
"summary": "SSA-285795: Denial of Service in OPC-UA in Industrial Products - TXT Version",
"url": "https://cert-portal.siemens.com/productcert/txt/ssa-285795.txt"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-22-132-08 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2022/icsa-22-132-08.json"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-22-132-08 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-22-132-08"
},
{
"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 Industrial Products with OPC UA",
"tracking": {
"current_release_date": "2023-10-10T00:00:00.000000Z",
"generator": {
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-22-132-08",
"initial_release_date": "2022-05-10T00:00:00.000000Z",
"revision_history": [
{
"date": "2022-05-10T00:00:00.000000Z",
"legacy_version": "1.0",
"number": "1",
"summary": "Publication Date"
},
{
"date": "2022-07-12T00:00:00.000000Z",
"legacy_version": "1.1",
"number": "2",
"summary": "Added fix for SIMATIC NET PC Software V16"
},
{
"date": "2022-08-09T00:00:00.000000Z",
"legacy_version": "1.2",
"number": "3",
"summary": "Added fix for TeleControl Server Basic"
},
{
"date": "2022-10-11T00:00:00.000000Z",
"legacy_version": "1.3",
"number": "4",
"summary": "Added SIMATIC HMI Comfort Outdoor Panels and SIMATIC HMI KTP Mobile Panels to list of affected products"
},
{
"date": "2023-10-10T00:00:00.000000Z",
"legacy_version": "1.4",
"number": "5",
"summary": "Added fix for SITOP Manager"
}
],
"status": "final",
"version": "5"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "<V17_Update_5",
"product": {
"name": "SIMATIC HMI Comfort Outdoor Panels (incl. SIPLUS variants)",
"product_id": "CSAFPID-0001"
}
}
],
"category": "product_name",
"name": "SIMATIC HMI Comfort Outdoor Panels (incl. SIPLUS variants)"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V17_Update_5",
"product": {
"name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)",
"product_id": "CSAFPID-0002"
}
}
],
"category": "product_name",
"name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V17_Update_5",
"product": {
"name": "SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900F",
"product_id": "CSAFPID-0003"
}
}
],
"category": "product_name",
"name": "SIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900F"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V14_SP1_Update_14",
"product": {
"name": "SIMATIC NET PC Software V14",
"product_id": "CSAFPID-0004"
}
}
],
"category": "product_name",
"name": "SIMATIC NET PC Software V14"
},
{
"branches": [
{
"category": "product_version_range",
"name": "vers:all/*",
"product": {
"name": "SIMATIC NET PC Software V15",
"product_id": "CSAFPID-0005"
}
}
],
"category": "product_name",
"name": "SIMATIC NET PC Software V15"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V16_Update_6",
"product": {
"name": "SIMATIC NET PC Software V16",
"product_id": "CSAFPID-0006"
}
}
],
"category": "product_name",
"name": "SIMATIC NET PC Software V16"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V17_SP_1",
"product": {
"name": "SIMATIC NET PC Software V17",
"product_id": "CSAFPID-0007"
}
}
],
"category": "product_name",
"name": "SIMATIC NET PC Software V17"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V1.2.4",
"product": {
"name": "SITOP Manager",
"product_id": "CSAFPID-0008"
}
}
],
"category": "product_name",
"name": "SITOP Manager"
},
{
"branches": [
{
"category": "product_version_range",
"name": "<V3.1.1",
"product": {
"name": "TeleControl Server Basic V3",
"product_id": "CSAFPID-0009"
}
}
],
"category": "product_name",
"name": "TeleControl Server Basic V3"
}
],
"category": "vendor",
"name": "Siemens"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2021-45117",
"cwe": {
"id": "CWE-476",
"name": "NULL Pointer Dereference"
},
"notes": [
{
"category": "summary",
"text": "The OPC UA ANSIC Stack (also called Legacy C-Stack) was reported to crash when an unexpected OPC UA Response message status code was accessed via the synchronous Client API. The vulnerability was found in generated code of the OPC Foundation C-Stack. An unexpected status code in response message will dereference Null pointer leading to crash, ping of death (PoD). This affects a client, but it might also affect a server when it uses OpcUa_ClientApi_RegisterServer (e.g. register at LDS). A specially crafted UA server, or Man in the Middle attacker, can cause the OPC UA application to crash by sending uncertain status code in response message.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009"
]
},
"remediations": [
{
"category": "mitigation",
"details": "Do not use OPC client feature to connect via untrusted networks or to untrusted OPC-UA communication partners",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003",
"CSAFPID-0004",
"CSAFPID-0005",
"CSAFPID-0006",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009"
]
},
{
"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",
"CSAFPID-0007",
"CSAFPID-0008",
"CSAFPID-0009"
]
},
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
"CSAFPID-0005"
]
},
{
"category": "vendor_fix",
"details": "Update to V1.2.4 or later version",
"product_ids": [
"CSAFPID-0008"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109760607/"
},
{
"category": "vendor_fix",
"details": "Update to V3.1.1 or later version",
"product_ids": [
"CSAFPID-0009"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109812231/"
},
{
"category": "vendor_fix",
"details": "Update SIMATIC WinCC (TIA Portal) to V17 Update 5 or newer, and then update panel to V17 Update 5 or newer",
"product_ids": [
"CSAFPID-0001",
"CSAFPID-0002",
"CSAFPID-0003"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109746530/"
},
{
"category": "vendor_fix",
"details": "Update to V16 Update 6 or later version",
"product_ids": [
"CSAFPID-0006"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109811815/"
},
{
"category": "vendor_fix",
"details": "Update to V14 SP1 Update 14 or later version",
"product_ids": [
"CSAFPID-0004"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109807351/"
},
{
"category": "vendor_fix",
"details": "Update to V17 SP1 or later version",
"product_ids": [
"CSAFPID-0007"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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"
]
}
],
"title": "CVE-2021-45117"
}
]
}