{
"document": {
"acknowledgments": [
{
"organization": "Siemens ProductCERT",
"summary": "reporting this vulnerability to CISA."
},
{
"organization": "Cybersecurity and Infrastructure Security Agency (CISA)",
"summary": "coordination efforts"
},
{
"names": [
"Sharon Brizinov"
],
"organization": "Claroty",
"summary": "coordinated disclosure"
}
],
"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 in SINEMA Remote Connect Server could allow an unauthorized remote attacker to retrieve or manipulate sensitive information from the affected software. In addition, the attacker could also cause a Denial-of-Service condition in devices controlled by the affected software.\n\nSiemens has released an update for the SINEMA Remote Connect Server and recommends to update to the latest version.",
"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 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-334944: Vulnerability in SINEMA Remote Connect Server - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-334944.json"
},
{
"category": "self",
"summary": "SSA-334944: Vulnerability in SINEMA Remote Connect Server - TXT Version",
"url": "https://cert-portal.siemens.com/productcert/txt/ssa-334944.txt"
},
{
"category": "self",
"summary": "SSA-334944: Vulnerability in SINEMA Remote Connect Server - PDF Version",
"url": "https://cert-portal.siemens.com/productcert/pdf/ssa-334944.pdf"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-21-257-19 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsa-21-257-19.json"
},
{
"category": "self",
"summary": "ICS Advisory ICSA-21-257-19 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-21-257-19"
},
{
"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 SINEMA Remote Connect Server",
"tracking": {
"current_release_date": "2021-09-14T00:00:00.000000Z",
"generator": {
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-21-257-19",
"initial_release_date": "2021-09-14T00:00:00.000000Z",
"revision_history": [
{
"date": "2021-09-14T00:00:00.000000Z",
"legacy_version": "1.0",
"number": "1",
"summary": "Publication Date"
}
],
"status": "final",
"version": "1"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "<V3.0_SP2",
"product": {
"name": "SINEMA Remote Connect Server",
"product_id": "CSAFPID-0001"
}
}
],
"category": "product_name",
"name": "SINEMA Remote Connect Server"
}
],
"category": "vendor",
"name": "Siemens"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2021-37177",
"cwe": {
"id": "CWE-471",
"name": "Modification of Assumed-Immutable Data (MAID)"
},
"notes": [
{
"category": "summary",
"text": "The status provided by the syslog clients managed by the affected software can be manipulated by an unauthenticated attacker in the same network of the affected system.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-37177 - SINEMA Remote Connect Server",
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
},
{
"summary": "CVE-2021-37177 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-37177.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V3.0 SP2 or later version",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-37177"
},
{
"cve": "CVE-2021-37183",
"cwe": {
"id": "CWE-284",
"name": "Improper Access Control"
},
"notes": [
{
"category": "summary",
"text": "The affected software allows sending send-to-sleep notifications to the managed devices. An unauthenticated attacker in the same network of the affected system can abuse these notifications to cause a Denial-of-Service condition in the managed devices.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-37183 - SINEMA Remote Connect Server",
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
},
{
"summary": "CVE-2021-37183 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-37183.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V3.0 SP2 or later version",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.4,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-37183"
},
{
"cve": "CVE-2021-37190",
"cwe": {
"id": "CWE-200",
"name": "Exposure of Sensitive Information to an Unauthorized Actor"
},
"notes": [
{
"category": "summary",
"text": "The affected software has an information disclosure vulnerability that could allow an attacker to retrieve VPN connection for a known user.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-37190 - SINEMA Remote Connect Server",
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
},
{
"summary": "CVE-2021-37190 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-37190.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V3.0 SP2 or later version",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-37190"
},
{
"cve": "CVE-2021-37191",
"cwe": {
"id": "CWE-799",
"name": "Improper Control of Interaction Frequency"
},
"notes": [
{
"category": "summary",
"text": "An unauthenticated attacker in the same network of the affected system could brute force the usernames from the affected software.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-37191 - SINEMA Remote Connect Server",
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
},
{
"summary": "CVE-2021-37191 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-37191.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V3.0 SP2 or later version",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 3.1,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-37191"
},
{
"cve": "CVE-2021-37192",
"cwe": {
"id": "CWE-200",
"name": "Exposure of Sensitive Information to an Unauthorized Actor"
},
"notes": [
{
"category": "summary",
"text": "The affected software has an information disclosure vulnerability that could allow an attacker to retrieve a list of network devices a known user can manage.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-37192 - SINEMA Remote Connect Server",
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
},
{
"summary": "CVE-2021-37192 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-37192.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V3.0 SP2 or later version",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
],
"title": "CVE-2021-37192"
},
{
"cve": "CVE-2021-37193",
"cwe": {
"id": "CWE-471",
"name": "Modification of Assumed-Immutable Data (MAID)"
},
"notes": [
{
"category": "summary",
"text": "An unauthenticated attacker in the same network of the affected system could manipulate certain parameters and set a valid user of the affected software as invalid (or vice-versa).",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"summary": "CVE-2021-37193 - SINEMA Remote Connect Server",
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
},
{
"summary": "CVE-2021-37193 Mitre 5.0 json",
"url": "https://cert-portal.siemens.com/productcert/mitre/CVE-2021-37193.json"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "Update to V3.0 SP2 or later version",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://support.industry.siemens.com/cs/de/en/view/109793790/"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:A/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-2021-37193"
}
]
}