icsa-22-195-12
Vulnerability from csaf_cisa
Published
2022-07-12 00:00
Modified
2023-03-14 00:00
Summary
Siemens SRCS VPN Feature in SIMATIC CP Devices

Notes

Summary
The below referenced devices contain multiple vulnerabilities that could be exploited when the SINEMA Remote Connect Server (SRCS) VPN feature is used. The feature is not activated by default. The most severe could allow an attacker to execute arbitrary code with elevated privileges under certain circumstances. Siemens has released updates for the affected products and recommends to update to the latest versions.
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.



{
   document: {
      acknowledgments: [
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            summary: "reporting these vulnerabilities to CISA.",
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      category: "csaf_security_advisory",
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      distribution: {
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         tlp: {
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      notes: [
         {
            category: "summary",
            text: "The below referenced devices contain multiple vulnerabilities that could be exploited when the SINEMA Remote Connect Server (SRCS) VPN feature is used. The feature is not activated by default. The most severe could allow an attacker to execute arbitrary code with elevated privileges under certain circumstances.\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",
         },
         {
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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",
            title: "Additional Resources",
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         {
            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",
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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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            title: "Recommended Practices",
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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",
         },
         {
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            title: "Recommended Practices",
         },
         {
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            title: "Recommended Practices",
         },
         {
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            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.",
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            category: "self",
            summary: "SSA-517377: Multiple Vulnerabilities in the SRCS VPN Feature in SIMATIC CP Devices - CSAF Version",
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         },
         {
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         },
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      ],
      title: "Siemens SRCS VPN Feature in SIMATIC CP Devices",
      tracking: {
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   vulnerabilities: [
      {
         cve: "CVE-2022-34819",
         cwe: {
            id: "CWE-122",
            name: "Heap-based Buffer Overflow",
         },
         notes: [
            {
               category: "summary",
               text: "The application lacks proper validation of user-supplied data when parsing specific messages. This could result in a heap-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of device.",
               title: "Summary",
            },
         ],
         product_status: {
            known_affected: [
               "CSAFPID-0001",
               "CSAFPID-0002",
               "CSAFPID-0003",
               "CSAFPID-0004",
               "CSAFPID-0005",
               "CSAFPID-0006",
               "CSAFPID-0007",
               "CSAFPID-0008",
               "CSAFPID-0009",
               "CSAFPID-0010",
               "CSAFPID-0011",
               "CSAFPID-0012",
               "CSAFPID-0013",
               "CSAFPID-0014",
               "CSAFPID-0015",
            ],
         },
         remediations: [
            {
               category: "mitigation",
               details: "Make sure to configure the CP to only connect to trusted SINEMA Remote Connect Server instances",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
            {
               category: "vendor_fix",
               details: "Update to V2.2.28 or later version",
               product_ids: [
                  "CSAFPID-0006",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109817067/",
            },
            {
               category: "vendor_fix",
               details: "Update to V3.3.46 or later version",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0012",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109812218",
            },
            {
               category: "vendor_fix",
               details: "Update to V3.0.22 or later version",
               product_ids: [
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                  "CSAFPID-0013",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109808678/",
            },
            {
               category: "workaround",
               details: "Block access to port 5243/udp e.g. with an external firewall if possible",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
            {
               category: "workaround",
               details: "Disable the SINEMA Remote Connect Server (SRCS) VPN feature",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
         ],
         scores: [
            {
               cvss_v3: {
                  baseScore: 10,
                  baseSeverity: "CRITICAL",
                  vectorString: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
         ],
         title: "CVE-2022-34819",
      },
      {
         cve: "CVE-2022-34820",
         cwe: {
            id: "CWE-77",
            name: "Improper Neutralization of Special Elements used in a Command ('Command Injection')",
         },
         notes: [
            {
               category: "summary",
               text: "The application does not correctly escape some user provided fields during the authentication process. This could allow an attacker to inject custom commands and execute arbitrary code with elevated privileges.",
               title: "Summary",
            },
         ],
         product_status: {
            known_affected: [
               "CSAFPID-0001",
               "CSAFPID-0002",
               "CSAFPID-0003",
               "CSAFPID-0004",
               "CSAFPID-0005",
               "CSAFPID-0006",
               "CSAFPID-0007",
               "CSAFPID-0008",
               "CSAFPID-0009",
               "CSAFPID-0010",
               "CSAFPID-0011",
               "CSAFPID-0012",
               "CSAFPID-0013",
               "CSAFPID-0014",
               "CSAFPID-0015",
            ],
         },
         remediations: [
            {
               category: "mitigation",
               details: "Make sure to configure the CP to only connect to trusted SINEMA Remote Connect Server instances",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
            {
               category: "vendor_fix",
               details: "Update to V2.2.28 or later version",
               product_ids: [
                  "CSAFPID-0006",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109817067/",
            },
            {
               category: "vendor_fix",
               details: "Update to V3.3.46 or later version",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0012",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109812218",
            },
            {
               category: "vendor_fix",
               details: "Update to V3.0.22 or later version",
               product_ids: [
                  "CSAFPID-0007",
                  "CSAFPID-0013",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109808678/",
            },
            {
               category: "workaround",
               details: "Block access to port 5243/udp e.g. with an external firewall if possible",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
            {
               category: "workaround",
               details: "Disable the SINEMA Remote Connect Server (SRCS) VPN feature",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
         ],
         scores: [
            {
               cvss_v3: {
                  baseScore: 8.4,
                  baseSeverity: "HIGH",
                  vectorString: "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/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",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
         ],
         title: "CVE-2022-34820",
      },
      {
         cve: "CVE-2022-34821",
         cwe: {
            id: "CWE-94",
            name: "Improper Control of Generation of Code ('Code Injection')",
         },
         notes: [
            {
               category: "summary",
               text: "By injecting code to specific configuration options for OpenVPN, an attacker could execute arbitrary code with elevated privileges.",
               title: "Summary",
            },
         ],
         product_status: {
            known_affected: [
               "CSAFPID-0001",
               "CSAFPID-0002",
               "CSAFPID-0003",
               "CSAFPID-0004",
               "CSAFPID-0005",
               "CSAFPID-0006",
               "CSAFPID-0007",
               "CSAFPID-0008",
               "CSAFPID-0009",
               "CSAFPID-0010",
               "CSAFPID-0011",
               "CSAFPID-0012",
               "CSAFPID-0013",
               "CSAFPID-0014",
               "CSAFPID-0015",
            ],
         },
         remediations: [
            {
               category: "mitigation",
               details: "Make sure to configure the CP to only connect to trusted SINEMA Remote Connect Server instances",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
            {
               category: "vendor_fix",
               details: "Update to V2.2.28 or later version",
               product_ids: [
                  "CSAFPID-0006",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109817067/",
            },
            {
               category: "vendor_fix",
               details: "Update to V3.3.46 or later version",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0012",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109812218",
            },
            {
               category: "vendor_fix",
               details: "Update to V3.0.22 or later version",
               product_ids: [
                  "CSAFPID-0007",
                  "CSAFPID-0013",
               ],
               url: "https://support.industry.siemens.com/cs/ww/en/view/109808678/",
            },
            {
               category: "workaround",
               details: "Block access to port 5243/udp e.g. with an external firewall if possible",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
            {
               category: "workaround",
               details: "Disable the SINEMA Remote Connect Server (SRCS) VPN feature",
               product_ids: [
                  "CSAFPID-0001",
                  "CSAFPID-0002",
                  "CSAFPID-0003",
                  "CSAFPID-0004",
                  "CSAFPID-0005",
                  "CSAFPID-0006",
                  "CSAFPID-0007",
                  "CSAFPID-0008",
                  "CSAFPID-0009",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
         ],
         scores: [
            {
               cvss_v3: {
                  baseScore: 7.6,
                  baseSeverity: "HIGH",
                  vectorString: "CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/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",
                  "CSAFPID-0010",
                  "CSAFPID-0011",
                  "CSAFPID-0012",
                  "CSAFPID-0013",
                  "CSAFPID-0014",
                  "CSAFPID-0015",
               ],
            },
         ],
         title: "CVE-2022-34821",
      },
   ],
}


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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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