{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Lars Lengersdorf"
        ],
        "organization": "Amprion GmbH",
        "summary": "reporting this vulnerability to Siemens"
      }
    ],
    "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-US",
    "notes": [
      {
        "category": "general",
        "text": "This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov",
        "title": "CISA Disclaimer"
      },
      {
        "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": "summary",
        "text": "The EN100 Ethernet communication module and SIPROTEC 5 relays are affected by a security vulnerability that could allow an attacker to conduct a denial-of-service attack over the network.",
        "title": "Risk evaluation"
      },
      {
        "category": "other",
        "text": "Energy",
        "title": "Critical infrastructure sectors"
      },
      {
        "category": "other",
        "text": "Worldwide",
        "title": "Countries/areas deployed"
      },
      {
        "category": "other",
        "text": "Germany",
        "title": "Company headquarters location"
      },
      {
        "category": "general",
        "text": "NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.",
        "title": "Recommended Practices"
      },
      {
        "category": "general",
        "text": "For further inquiries on security vulnerabilities in Siemens products and \nsolutions, please contact the Siemens ProductCERT:\n\nhttps://www.siemens.com/cert/advisories",
        "title": "Additional Resources"
      },
      {
        "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": "other",
        "text": "No known public exploits specifically target this vulnerability.",
        "title": "Exploitability"
      }
    ],
    "publisher": {
      "category": "coordinator",
      "contact_details": "Email: CISAservicedesk@cisa.dhs.gov;\n Toll Free: 1-888-282-0870",
      "name": "CISA",
      "namespace": "https://www.cisa.gov/"
    },
    "references": [
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-19-043-02 JSON",
        "url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2019/icsa-19-043-02.json"
      },
      {
        "category": "self",
        "summary": "ICS Advisory ICSA-19-043-02 Web Version",
        "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-19-043-02"
      },
      {
        "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/uscert/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
      },
      {
        "category": "external",
        "summary": "Recommended Practices",
        "url": "https://www.cisa.gov/uscert/ics/tips/ICS-TIP-12-146-01B"
      },
      {
        "category": "external",
        "summary": "SSA-496604: SSA-104088: Denial-of-Service Vulnerabilities in EN100 Ethernet Communication Module and SIPROTEC 5 relays - TXT Version",
        "url": "https://cert-portal.siemens.com/productcert/txt/SSA-104088.txt"
      }
    ],
    "title": "Siemens EN100 Ethernet Communication Module and SIPROTEC 5 Relays",
    "tracking": {
      "current_release_date": "2019-02-12T00:00:00.000000Z",
      "generator": {
        "engine": {
          "name": "CISA CSAF Generator",
          "version": "1.0.0"
        }
      },
      "id": "ICSA-19-043-02",
      "initial_release_date": "2019-02-12T00:00:00.000000Z",
      "revision_history": [
        {
          "date": "2019-02-12T00:00:00.000000Z",
          "legacy_version": "Initial",
          "number": "1",
          "summary": "ICSA-19-043-02 Siemens EN100 Ethernet Communication Module and SIPROTEC 5 Relays"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V4.35",
                "product": {
                  "name": "Firmware variant IEC 61850 for EN100 Ethernet module: All versions \u003c V4.35",
                  "product_id": "CSAFPID-0001"
                }
              }
            ],
            "category": "product_name",
            "name": "Firmware variant IEC 61850 for EN100 Ethernet module"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions",
                "product": {
                  "name": "Firmware variant MODBUS TCP for EN100 Ethernet module: All versions",
                  "product_id": "CSAFPID-0002"
                }
              }
            ],
            "category": "product_name",
            "name": "Firmware variant MODBUS TCP for EN100 Ethernet module"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions",
                "product": {
                  "name": "Firmware variant DNP3 TCP for EN100 Ethernet module: All versions",
                  "product_id": "CSAFPID-0003"
                }
              }
            ],
            "category": "product_name",
            "name": "Firmware variant DNP3 TCP for EN100 Ethernet module"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions",
                "product": {
                  "name": "Firmware variant IEC104 for EN100 Ethernet module: All versions",
                  "product_id": "CSAFPID-0004"
                }
              }
            ],
            "category": "product_name",
            "name": "Firmware variant IEC104 for EN100 Ethernet module"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions",
                "product": {
                  "name": "Firmware variant Profinet IO for EN100 Ethernet module: All versions",
                  "product_id": "CSAFPID-0005"
                }
              }
            ],
            "category": "product_name",
            "name": "Firmware variant Profinet IO for EN100 Ethernet module"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V7.82",
                "product": {
                  "name": "SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective: All versions \u003c V7.82",
                  "product_id": "CSAFPID-0006"
                }
              }
            ],
            "category": "product_name",
            "name": "SIPROTEC 5 relays with CPU variants CP300 and CP100 and the respective"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "All versions \u003c V7.58",
                "product": {
                  "name": "SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet: All versions \u003c V7.58",
                  "product_id": "CSAFPID-0007"
                }
              }
            ],
            "category": "product_name",
            "name": "SIPROTEC 5 relays with CPU variants CP200 and the respective Ethernet"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2018-16563",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "notes": [
        {
          "category": "summary",
          "text": "Specially crafted packets to port 102/tcp could cause a denial-of-service condition in the affected products. A manual restart is required to recover the EN100 module functionality of the affected devices.",
          "title": "Summary"
        },
        {
          "category": "summary",
          "text": "Successful exploitation requires an attacker with network access to send multiple packets to the affected products or modules. As a precondition the IEC 61850-MMS communication needs to be activated on the affected products or modules. No user interaction or privileges are required to exploit the vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the network functionality of the device, compromising the availability of the system.",
          "title": "Summary"
        },
        {
          "category": "summary",
          "text": "At the time of advisory publication no public exploitation of this security vulnerability was known.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004",
          "CSAFPID-0005",
          "CSAFPID-0006",
          "CSAFPID-0007"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "https://support.industry.siemens.com/",
          "url": "https://support.industry.siemens.com/"
        },
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2018-16563"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Block access to port 102/tcp e.g. with an external firewall.",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V4.35 - Download: https://support.industry.siemens.com/cs/us/en/view/109745821.  Applying the update causes the module to go through a single restart cycle. ",
          "product_ids": [
            "CSAFPID-0001"
          ],
          "url": "https://support.industry.siemens.com/cs/us/en/view/109745821."
        },
        {
          "category": "vendor_fix",
          "details": "See recommendations from section Workaround and Mitigations ",
          "product_ids": [
            "CSAFPID-0002"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "See recommendations from section Workaround and Mitigations ",
          "product_ids": [
            "CSAFPID-0003"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "See recommendations from section Workaround and Mitigations ",
          "product_ids": [
            "CSAFPID-0004"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "See recommendations from section Workaround and Mitigations ",
          "product_ids": [
            "CSAFPID-0005"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to firmware version V7.82 for the following device types: 6MD85, 6MD86, 7SS85, 7KE85, 7UM85, 7SA87, 7SD87, 7SL87, 7VK87, 7SA82, 7SA86, 7SD82, 7SD86, 7SL82, 7SL86, 7SJ86, 7SK82, 7SK85, 7SJ82, 7SJ85, 7UT82, 7UT85, 7UT86, and 7UT87. - Download: https://support.industry.siemens.com/  Search for \"SIPROTEC 5 - DIGSI Device Drivers V7.8x\".  The firmware version V7.82 for the communications modules can also be found on each device specific download page: See under \"Additional DIGSI Device Driver - V7.8x\", article \"Protocols\".  Applying the update causes the module to go through a single restart cycle. ",
          "product_ids": [
            "CSAFPID-0006"
          ],
          "url": "https://support.industry.siemens.com/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to firmware version V7.58 for the following device types: 6MD85, 6MD86, 7SS85, 7KE85, 7UM85, 7SA87, 7SD87, 7SL87, 7VK87, 7SA82, 7SA86, 7SD82, 7SD86, 7SL82, 7SL86, 7SJ86, 7SK82, 7SK85, 7SJ82, 7SJ85, 7UT82, 7UT85, 7UT86, and 7UT87. - Download: https://support.industry.siemens.com/  Search for \"SIPROTEC 5 - DIGSI Device Drivers V7.58\".  The firmware version V7.58 for the communications modules can also be found on each device specific download page: See in the \u201cPrevious Versions\u201d section, article \u201cProtocols\u201d.  Applying the update causes the module to go through a single restart cycle. ",
          "product_ids": [
            "CSAFPID-0007"
          ],
          "url": "https://support.industry.siemens.com/"
        },
        {
          "category": "mitigation",
          "details": "Siemens 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 strongly recommends prior validation of any security update before being applied, and supervision by trained staff of the update process in the target environment. As a general security measure Siemens 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. Recommended security guidelines to Secure Substations can be found at: https://www.siemens.com/gridsecurity",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C",
            "version": "3.0"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007"
          ]
        }
      ]
    }
  ]
}