{
"document": {
"acknowledgments": [
{
"organization": "Siemens ProductCERT",
"summary": "reporting these vulnerabilities to CISA."
}
],
"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": "Multiple vulnerabilities (also known as \"NUCLEUS:13\") have been identified in the Nucleus RTOS (real-time operating system) and reported in the Siemens Security Advisory SSA-044112: https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf.\n\nPLUSCONTROL 1st Gen devices are affected by some of the vulnerabilities as documented below.\n\nSiemens Energy recommends specific countermeasures for products where updates are not available.",
"title": "Summary"
},
{
"category": "general",
"text": "Operators of critical power systems (e.g. TSOs or DSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid's reliability can thus be minimized by virtue of the grid design.\n\nSiemens Energy strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens Energy strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment.\n\nAs a general security measure Siemens Energy strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment.",
"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-845392: Multiple Vulnerabilities in Nucleus RTOS based Siemens Energy PLUSCONTROL 1st Gen Devices - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-845392.json"
},
{
"category": "self",
"summary": "SSA-845392: Multiple Vulnerabilities in Nucleus RTOS based Siemens Energy PLUSCONTROL 1st Gen Devices - TXT Version",
"url": "https://cert-portal.siemens.com/productcert/txt/ssa-845392.txt"
},
{
"category": "self",
"summary": "SSA-845392: Multiple Vulnerabilities in Nucleus RTOS based Siemens Energy PLUSCONTROL 1st Gen Devices - PDF Version",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-845392.pdf"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-22-013-03 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2022/icsa-22-013-03.json"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-22-013-03 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-22-013-03"
},
{
"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 Energy PLUSCONTROL",
"tracking": {
"current_release_date": "2022-01-11T00:00:00.000000Z",
"generator": {
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-22-013-03",
"initial_release_date": "2022-01-11T00:00:00.000000Z",
"revision_history": [
{
"date": "2022-01-11T00:00:00.000000Z",
"legacy_version": "1.0",
"number": "1",
"summary": "Publication Date"
}
],
"status": "final",
"version": "1"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "vers:all/*",
"product": {
"name": "PLUSCONTROL 1st Gen",
"product_id": "CSAFPID-0001"
}
}
],
"category": "product_name",
"name": "PLUSCONTROL 1st Gen"
}
],
"category": "vendor",
"name": "Siemens"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2021-31344",
"cwe": {
"id": "CWE-843",
"name": "Access of Resource Using Incompatible Type ('Type Confusion')"
},
"notes": [
{
"category": "summary",
"text": "ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. (FSMD-2021-0004)",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-31344 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31344.json"
}
],
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no remediation is planned",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "PLUSCONTROL devices are typically located in a separate LAN segment of energy transmission solutions, where an attacker could use these vulnerabilities to disrupt SER messages or Trace functionalities. Therefore, review the status of the defense in depth recommendations that apply to your specific deployment and align as needed. Especially the measures on the network layer to prevent accessibility from other network segments.",
"product_ids": [
"CSAFPID-0001"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-31344"
},
{
"cve": "CVE-2021-31345",
"cwe": {
"id": "CWE-1284",
"name": "Improper Validation of Specified Quantity in Input"
},
"notes": [
{
"category": "summary",
"text": "The total length of an UDP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on a user-defined applications that runs on top of the UDP protocol. (FSMD-2021-0006)",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-31345 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31345.json"
}
],
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no remediation is planned",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "PLUSCONTROL devices are typically located in a separate LAN segment of energy transmission solutions, where an attacker could use these vulnerabilities to disrupt SER messages or Trace functionalities. Therefore, review the status of the defense in depth recommendations that apply to your specific deployment and align as needed. Especially the measures on the network layer to prevent accessibility from other network segments.",
"product_ids": [
"CSAFPID-0001"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-31345"
},
{
"cve": "CVE-2021-31346",
"cwe": {
"id": "CWE-1284",
"name": "Improper Validation of Specified Quantity in Input"
},
"notes": [
{
"category": "summary",
"text": "The total length of an ICMP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on the network buffer organization in memory. (FSMD-2021-0007)",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-31346 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31346.json"
}
],
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no remediation is planned",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "PLUSCONTROL devices are typically located in a separate LAN segment of energy transmission solutions, where an attacker could use these vulnerabilities to disrupt SER messages or Trace functionalities. Therefore, review the status of the defense in depth recommendations that apply to your specific deployment and align as needed. Especially the measures on the network layer to prevent accessibility from other network segments.",
"product_ids": [
"CSAFPID-0001"
]
}
],
"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"
]
}
],
"title": "CVE-2021-31346"
},
{
"cve": "CVE-2021-31885",
"cwe": {
"id": "CWE-805",
"name": "Buffer Access with Incorrect Length Value"
},
"notes": [
{
"category": "summary",
"text": "TFTP server application allows for reading the contents of the TFTP memory buffer via sending malformed TFTP commands. (FSMD-2021-0009)",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-31885 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31885.json"
}
],
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no remediation is planned",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "PLUSCONTROL devices are typically located in a separate LAN segment of energy transmission solutions, where an attacker could use these vulnerabilities to disrupt SER messages or Trace functionalities. Therefore, review the status of the defense in depth recommendations that apply to your specific deployment and align as needed. Especially the measures on the network layer to prevent accessibility from other network segments.",
"product_ids": [
"CSAFPID-0001"
]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-31885"
},
{
"cve": "CVE-2021-31889",
"cwe": {
"id": "CWE-191",
"name": "Integer Underflow (Wrap or Wraparound)"
},
"notes": [
{
"category": "summary",
"text": "Malformed TCP packets with a corrupted SACK option leads to Information Leaks and Denial-of-Service conditions. (FSMD-2021-0015)",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-31889 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31889.json"
}
],
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no remediation is planned",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "PLUSCONTROL devices are typically located in a separate LAN segment of energy transmission solutions, where an attacker could use these vulnerabilities to disrupt SER messages or Trace functionalities. Therefore, review the status of the defense in depth recommendations that apply to your specific deployment and align as needed. Especially the measures on the network layer to prevent accessibility from other network segments.",
"product_ids": [
"CSAFPID-0001"
]
}
],
"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"
]
}
],
"title": "CVE-2021-31889"
},
{
"cve": "CVE-2021-31890",
"cwe": {
"id": "CWE-240",
"name": "Improper Handling of Inconsistent Structural Elements"
},
"notes": [
{
"category": "summary",
"text": "The total length of an TCP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on the network buffer organization in memory. (FSMD-2021-0017)",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-31890 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-31890.json"
}
],
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no remediation is planned",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "PLUSCONTROL devices are typically located in a separate LAN segment of energy transmission solutions, where an attacker could use these vulnerabilities to disrupt SER messages or Trace functionalities. Therefore, review the status of the defense in depth recommendations that apply to your specific deployment and align as needed. Especially the measures on the network layer to prevent accessibility from other network segments.",
"product_ids": [
"CSAFPID-0001"
]
}
],
"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"
]
}
],
"title": "CVE-2021-31890"
}
]
}