icsa-23-348-03
Vulnerability from csaf_cisa
Published
2023-12-12 00:00
Modified
2023-12-12 00:00
Summary
Siemens User Management Component (UMC)
Notes
Summary
Siemens User Management Component (UMC) before V2.11.2 is affected by multiple vulnerabilities where the most severe could lead to a restart of the UMC server.
Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens is preparing further updates and recommends specific countermeasures for products where updates are not, or not yet available.
General Recommendations
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.
Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use
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.
Legal Notice
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/.
Advisory Conversion Disclaimer
This CISA CSAF advisory was converted from Siemens ProductCERT's CSAF advisory.
Critical infrastructure sectors
Multiple
Countries/areas deployed
Worldwide
Company headquarters location
Germany
Recommended Practices
CISA recommends users take defensive measures to minimize the exploitation risk of this vulnerability.
Recommended Practices
Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the internet.
Recommended Practices
Locate control system networks and remote devices behind firewalls and isolate them from business networks.
Recommended Practices
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.
Recommended Practices
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
Recommended Practices
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.
Recommended Practices
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.
Recommended Practices
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
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{
"category": "summary",
"text": "Siemens User Management Component (UMC) before V2.11.2 is affected by multiple vulnerabilities where the most severe could lead to a restart of the UMC server.\n\nSiemens has released updates for several affected products and recommends to update to the latest versions. Siemens is preparing further updates and 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\u0027 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"
},
{
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"text": "For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories",
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"text": "Siemens Security Advisories are subject to the terms and conditions contained in Siemens\u0027 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\u0027 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"
},
{
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"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"
},
{
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"text": "This CISA CSAF advisory was converted from Siemens ProductCERT\u0027s CSAF advisory.",
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{
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"title": "Recommended Practices"
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{
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"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"
},
{
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"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",
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"title": "Recommended Practices"
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"references": [
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"category": "self",
"summary": "SSA-999588: Multiple Vulnerabilities in User Management Component (UMC) before V2.11.2 - CSAF Version",
"url": "https://cert-portal.siemens.com/productcert/csaf/ssa-999588.json"
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"vulnerabilities": [
{
"cve": "CVE-2023-46281",
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"name": "Permissive Cross-domain Policy with Untrusted Domains"
},
"notes": [
{
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"text": "When accessing the UMC Web-UI from affected products, UMC uses an overly permissive CORS policy. This could allow an attacker to trick a legitimate user to trigger unwanted behavior.",
"title": "Summary"
}
],
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"4",
"5",
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},
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{
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{
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"url": "https://support.industry.siemens.com/cs/ww/en/view/109825230/"
},
{
"category": "workaround",
"details": "CVE-2023-46281, CVE-2023-46282: Do not access links from untrusted sources",
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"2",
"3",
"4",
"5",
"6",
"7",
"8"
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}
],
"scores": [
{
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"title": "CVE-2023-46281"
},
{
"cve": "CVE-2023-46282",
"cwe": {
"id": "CWE-79",
"name": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)"
},
"notes": [
{
"category": "summary",
"text": "A reflected cross-site scripting (XSS) vulnerability exists in the web interface of the affected applications that could allow an attacker to inject arbitrary JavaScript code. The code could be potentially executed later by another (possibly privileged) user.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
},
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
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"5"
]
},
{
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"details": "Currently no fix is available",
"product_ids": [
"1",
"3",
"6",
"7"
]
},
{
"category": "vendor_fix",
"details": "Update to V18 Update 3 or later version",
"product_ids": [
"8"
]
},
{
"category": "vendor_fix",
"details": "Update to V4.1 or later version",
"product_ids": [
"2"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109825230/"
},
{
"category": "workaround",
"details": "CVE-2023-46281, CVE-2023-46282: Do not access links from untrusted sources",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"scores": [
{
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L/E:P/RL:O/RC:C",
"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"title": "CVE-2023-46282"
},
{
"cve": "CVE-2023-46283",
"cwe": {
"id": "CWE-120",
"name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
},
"notes": [
{
"category": "summary",
"text": "The affected application contains an out of bounds write past the end of an allocated buffer when handling specific requests on port 4002/tcp. This could allow an attacker to crash the application. The corresponding service is auto-restarted after the crash.",
"title": "Summary"
}
],
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"2",
"3",
"4",
"5",
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"7",
"8"
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{
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"5"
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{
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"details": "Currently no fix is available",
"product_ids": [
"1",
"3",
"6",
"7"
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},
{
"category": "vendor_fix",
"details": "Update to V18 Update 3 or later version",
"product_ids": [
"8"
]
},
{
"category": "vendor_fix",
"details": "Update to V4.1 or later version",
"product_ids": [
"2"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109825230/"
},
{
"category": "workaround",
"details": "CVE-2023-46283, CVE-2023-46284: If only one UMC server is used, block access to port 4002/tcp e.g. with an external firewall",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
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{
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"version": "3.1"
},
"products": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
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}
],
"title": "CVE-2023-46283"
},
{
"cve": "CVE-2023-46284",
"cwe": {
"id": "CWE-120",
"name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
},
"notes": [
{
"category": "summary",
"text": "The affected application contains an out of bounds write past the end of an allocated buffer when handling specific requests on port 4002/tcp and 4004/tcp. This could allow an attacker to crash the application. The corresponding service is auto-restarted after the crash.",
"title": "Summary"
}
],
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"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
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},
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
"4",
"5"
]
},
{
"category": "none_available",
"details": "Currently no fix is available",
"product_ids": [
"1",
"3",
"6",
"7"
]
},
{
"category": "vendor_fix",
"details": "Update to V18 Update 3 or later version",
"product_ids": [
"8"
]
},
{
"category": "vendor_fix",
"details": "Update to V4.1 or later version",
"product_ids": [
"2"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109825230/"
},
{
"category": "workaround",
"details": "CVE-2023-46283, CVE-2023-46284: If only one UMC server is used, block access to port 4002/tcp e.g. with an external firewall",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
},
{
"category": "workaround",
"details": "CVE-2023-46284, CVE-2023-46285: If only one RT server is used, block access to port 4004/tcp e.g. with an external firewall. If the deployment contains no RT-Servers, block the port in the local firewall.",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"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": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"title": "CVE-2023-46284"
},
{
"cve": "CVE-2023-46285",
"cwe": {
"id": "CWE-20",
"name": "Improper Input Validation"
},
"notes": [
{
"category": "summary",
"text": "The affected application contains an improper input validation vulnerability that could allow an attacker to bring the service into a Denial-of-Service state by sending a specifically crafted message to 4004/tcp. The corresponding service is auto-restarted after the crash is detected by a watchdog.",
"title": "Summary"
}
],
"product_status": {
"known_affected": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
},
"remediations": [
{
"category": "no_fix_planned",
"details": "Currently no fix is planned",
"product_ids": [
"4",
"5"
]
},
{
"category": "none_available",
"details": "Currently no fix is available",
"product_ids": [
"1",
"3",
"6",
"7"
]
},
{
"category": "vendor_fix",
"details": "Update to V18 Update 3 or later version",
"product_ids": [
"8"
]
},
{
"category": "vendor_fix",
"details": "Update to V4.1 or later version",
"product_ids": [
"2"
],
"url": "https://support.industry.siemens.com/cs/ww/en/view/109825230/"
},
{
"category": "workaround",
"details": "CVE-2023-46284, CVE-2023-46285: If only one RT server is used, block access to port 4004/tcp e.g. with an external firewall. If the deployment contains no RT-Servers, block the port in the local firewall.",
"product_ids": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"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": [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8"
]
}
],
"title": "CVE-2023-46285"
}
]
}
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