{
    "CVE_data_meta": {
        "ASSIGNER": "cve@rapid7.com",
        "DATE_PUBLIC": "2019-10-08T14:05:00.000Z",
        "ID": "CVE-2019-5636",
        "STATE": "PUBLIC",
        "TITLE": "Beckhoff TwinCAT Discovery Service Denial of Service"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "TwinCAT 2",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<=",
                                            "version_name": "2304",
                                            "version_value": "2304"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "TwinCAT 3.1",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<=",
                                            "version_name": "4204.0",
                                            "version_value": "4204.0"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Beckhoff"
                }
            ]
        }
    },
    "credit": [
        {
            "lang": "eng",
            "value": "This issue was discovered, and reported to Rapid7, by Andreas Galauner at Rapid7. It is being disclosed in accordance with Rapid7's vulnerability disclosure policy (https://www.rapid7.com/disclosure/)."
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "When a Beckhoff TwinCAT Runtime receives a malformed UDP packet, the ADS Discovery Service shuts down. Note that the TwinCAT devices are still performing as normal. This issue affects TwinCAT 2 version 2304 (and prior) and TwinCAT 3.1 version 4204.0 (and prior)."
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.0.8"
    },
    "impact": {
        "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-404 Improper Resource Shutdown or Release"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf",
                "refsource": "CONFIRM",
                "url": "https://download.beckhoff.com/download/Document/product-security/Advisories/advisory-2019-004.pdf"
            },
            {
                "name": "https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/",
                "refsource": "MISC",
                "url": "https://blog.rapid7.com/2019/10/08/r7-2019-32-denial-of-service-vulnerabilities-in-beckhoff-twincat-plc-environment-fixed/"
            }
        ]
    },
    "source": {
        "advisory": "R7-2019-32",
        "discovery": "EXTERNAL"
    }
}