icsa-19-318-02
Vulnerability from csaf_cisa
Published
2019-11-12 00:00
Modified
2020-07-14 00:00
Summary
Siemens S7-1200 and S7-200 SMART CPUs (Update B)

Notes

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 Resources
Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
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 a Siemens ProductCERT's 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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{
  "document": {
    "acknowledgments": [
      {
        "organization": "Siemens ProductCERT",
        "summary": "reporting this vulnerability to CISA."
      },
      {
        "names": [
          "Ali Abbasi"
        ],
        "organization": "Ruhr University of Bochum",
        "summary": "for coordinating disclosure"
      },
      {
        "names": [
          "Artem Zinenko"
        ],
        "organization": "Kaspersky",
        "summary": "for pointing out that SIPLUS should also be mentioned"
      }
    ],
    "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": "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: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.",
        "title": "General Recommendations"
      },
      {
        "category": "general",
        "text": "Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "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"
      },
      {
        "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 a Siemens ProductCERT\u0027s 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-686531: Hardware based manufacturing access on S7-1200 and S7-200 SMART - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-686531.html"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-19-318-02 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2019/icsa-19-318-02.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-19-318-02 - Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-19-318-02"
      },
      {
        "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 S7-1200 and S7-200 SMART CPUs (Update B)",
    "tracking": {
      "current_release_date": "2020-07-14T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-19-318-02",
      "initial_release_date": "2019-11-12T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2019-11-12T00:00:00.000000Z",
          "legacy_version": "1.0",
          "number": "1",
          "summary": "Publication Date"
        },
        {
          "date": "2020-07-14T00:00:00.000000Z",
          "legacy_version": "1.1",
          "number": "2",
          "summary": "Added solution information for SIMATIC S7-1200 and SIMATIC S7-200 SMART"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c_with_Function_State_FS_11",
                "product": {
                  "name": "Siemens SIMATIC S7-1200 CPU family V4.x (incl.\u0027SIPLUS variants): All versions with Function State (FS) \u003c 11",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-1200 CPU family V4.x (incl.\u0027SIPLUS variants)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:all/*",
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                  "product_id": "CSAFPID-0002"
                }
              }
            ],
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            "name": "SIMATIC S7-1200 CPU family \u003c V4.x (incl.\u0027SIPLUS variants)"
          },
          {
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                "category": "product_version_range",
                "name": "\u003c=V2.5.0_and_Function_State_FS_9",
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                  "product_id": "CSAFPID-0003"
                }
              }
            ],
            "category": "product_name",
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          },
          {
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                  "product_id": "CSAFPID-0004"
                }
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            ],
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          },
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                  "product_id": "CSAFPID-0005"
                }
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                  "product_id": "CSAFPID-0006"
                }
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            "name": "SIMATIC S7-200 SMART CPU ST60 (6ES7 288-1ST60-0AA0)"
          },
          {
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                  "product_id": "CSAFPID-0007"
                }
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            ],
            "category": "product_name",
            "name": "SIMATIC S7-200 SMART CPU SR20 (6ES7 288-1SR20-0AA0)"
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                }
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                  "product_id": "CSAFPID-0009"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-200 SMART CPU SR40 (6ES7 288-1SR40-0AA0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=V2.5.0_and_Function_State_FS_12",
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                  "product_id": "CSAFPID-0010"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-200 SMART CPU SR60 (6ES7 288-1SR60-0AA0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=V2.2.2_and_Function_State_FS_8",
                "product": {
                  "name": "Siemens SIMATIC S7-200 SMART CPU CR40 (6ES7 288-1CR40-0AA0): All versions \u003c= V2.2.2 and Function State (FS) \u003c= 8",
                  "product_id": "CSAFPID-0011"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-200 SMART CPU CR40 (6ES7 288-1CR40-0AA0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c=V2.2.2_and_Function_State_FS_10",
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                  "product_id": "CSAFPID-0012"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-200 SMART CPU CR60 (6ES7 288-1CR60-0AA0)"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
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                  "product_id": "CSAFPID-0013"
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                  "product_id": "CSAFPID-0014"
                }
              }
            ],
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            "name": "SIMATIC S7-200 SMART CPU CR30s (6ES7 288-1CR30-0AA1)"
          },
          {
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                "name": "\u003c=V2.3.0_and_Function_State_FS",
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                  "product_id": "CSAFPID-0015"
                }
              }
            ],
            "category": "product_name",
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          },
          {
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                "category": "product_version_range",
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                  "name": "Siemens SIMATIC S7-200 SMART CPU CR60s (6ES7 288-1CR60-0AA1): All versions \u003c= V2.3.0 and Function State (FS) \u003c= 3",
                  "product_id": "CSAFPID-0016"
                }
              }
            ],
            "category": "product_name",
            "name": "SIMATIC S7-200 SMART CPU CR60s (6ES7 288-1CR60-0AA1)"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2019-13945",
      "cwe": {
        "id": "CWE-749",
        "name": "Exposed Dangerous Method or Function"
      },
      "notes": [
        {
          "category": "summary",
          "text": "There is an access mode used during manufacturing of the affected devices that allows additional diagnostic functionality. The security vulnerability could be exploited by an attacker with physical access to the UART interface during boot process.",
          "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",
          "CSAFPID-0016"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Ensure physical access protection",
          "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",
            "CSAFPID-0016"
          ]
        },
        {
          "category": "mitigation",
          "details": "Apply Defense-in-Depth: https://www.siemens.com/cert/operational-guidelines-industrial-security",
          "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",
            "CSAFPID-0016"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to version \u003e= V4.4.1 and Function State (FS) \u003e= 11",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "none_available",
          "details": "Firmware versions less than V4.x cannot be updated.",
          "product_ids": [
            "CSAFPID-0002"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to version \u003e= V2.5.1 and the latest boot loader version",
          "product_ids": [
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-0010"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to version \u003e= V2.2.3 and the latest boot loader version",
          "product_ids": [
            "CSAFPID-0011",
            "CSAFPID-0012"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to version \u003e= V2.3.0 and the latest boot loader version",
          "product_ids": [
            "CSAFPID-0013",
            "CSAFPID-0014",
            "CSAFPID-0015",
            "CSAFPID-0016"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/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",
            "CSAFPID-0016"
          ]
        }
      ],
      "title": "CVE-2019-13945"
    }
  ]
}


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