{
  "document": {
    "acknowledgments": [
      {
        "organization": "CERT@VDE",
        "summary": "coordination",
        "urls": [
          "https://certvde.com"
        ]
      },
      {
        "names": [
          "Martin Menschner"
        ],
        "organization": "Rhebo GmbH",
        "summary": "support and efforts within coordinated\ndisclousure."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-GB",
    "notes": [
      {
        "category": "summary",
        "text": "The coupler\u0027s function could be inhibited by an attack.",
        "title": "Summary"
      },
      {
        "category": "description",
        "text": "The coupler\u0027s function could be inhibited by a denial of service attack. The coupler will not recover after the attack has stopped.\nA reboot of the device recovers the operation.",
        "title": "Impact"
      },
      {
        "category": "description",
        "text": "Beckhoff will not change this behaviour.\nCustomers should configure a perimeter firewall to block traffic from untrusted networks to the device.",
        "title": "Mitigation"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "product-securityincident@beckhoff.com",
      "name": "Beckhoff Automation GmbH \u0026 Co. KG",
      "namespace": "https://www.beckhoff.com"
    },
    "references": [
      {
        "category": "external",
        "summary": "CERT@VDE Security Advisories for Beckhoff Automation",
        "url": "https://certvde.com/en/advisories/vendor/beckhoffautomation/"
      },
      {
        "category": "self",
        "summary": "VDE-2020-005: Beckhoff: BK9000 couplers - Denial of service inhibits function - HTML",
        "url": "https://certvde.com/de/advisories/vde-2020-005/"
      },
      {
        "category": "self",
        "summary": "VDE-2020-005: Beckhoff: BK9000 couplers - Denial of service inhibits function - CSAF",
        "url": "https://beckhoff.csaf-tp.certvde.com/.well-known/csaf/white/2020/vde-2020-005.json"
      }
    ],
    "title": "Beckhoff: BK9000 couplers - Denial of service inhibits function",
    "tracking": {
      "aliases": [
        "VDE-2020-005"
      ],
      "current_release_date": "2025-05-22T13:03:10.000Z",
      "generator": {
        "date": "2025-04-11T07:19:30.715Z",
        "engine": {
          "name": "Secvisogram",
          "version": "2.5.23"
        }
      },
      "id": "VDE-2020-005",
      "initial_release_date": "2020-03-10T13:17:00.000Z",
      "revision_history": [
        {
          "date": "2020-03-10T13:17:00.000Z",
          "number": "1",
          "summary": "Initial revision."
        },
        {
          "date": "2025-01-16T10:00:00.000Z",
          "number": "2",
          "summary": "Fix: list of branches, typo in references url"
        },
        {
          "date": "2025-04-11T07:00:00.000Z",
          "number": "3",
          "summary": "Fix: version range"
        },
        {
          "date": "2025-05-22T13:03:10.000Z",
          "number": "4",
          "summary": "Fix: quotation mark"
        }
      ],
      "status": "final",
      "version": "4"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "branches": [
                  {
                    "category": "product_version_range",
                    "name": "vers:all/*",
                    "product": {
                      "name": "BK9000 vers:all/*",
                      "product_id": "CSAFPID-11001"
                    }
                  }
                ],
                "category": "product_name",
                "name": "BK9000"
              }
            ],
            "category": "product_family",
            "name": "Hardware"
          }
        ],
        "category": "vendor",
        "name": "Beckhoff Automation"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2020-9464",
      "cwe": {
        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
      },
      "notes": [
        {
          "category": "description",
          "text": "A Denial-of-Service vulnerability exists in BECKHOFF Ethernet TCP/IP Bus Coupler BK9000. After an attack has occurred, the device\u0027s functionality can be restored by rebooting.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-11001"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "Beckhoff will not change this behaviour.\nCustomers should configure a perimeter firewall to block traffic from untrusted networks to the device.",
          "product_ids": [
            "CSAFPID-11001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalScore": 7.5,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "temporalScore": 7.5,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-11001"
          ]
        }
      ],
      "title": "CVE-2020-9464"
    }
  ]
}