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