{ "id": "CVE-2021-37740", "sourceIdentifier": "cve@mitre.org", "published": "2022-04-20T20:15:07.993", "lastModified": "2022-05-03T18:07:57.137", "vulnStatus": "Analyzed", "descriptions": [ { "lang": "en", "value": "A denial of service vulnerability exists in MDT's firmware for the KNXnet/IP Secure router SCN-IP100.03 and KNX IP interface SCN-IP000.03 before v3.0.4, that allows a remote attacker to turn the device unresponsive to all requests on the KNXnet/IP Secure layer, until the device is rebooted, via a SESSION_REQUEST frame with a modified total length field." }, { "lang": "es", "value": "Se presenta una vulnerabilidad de denegaci\u00f3n de servicio en el firmware de MDT para el router KNXnet/IP Secure versi\u00f3n SCN-IP100.03 y la interfaz KNX IP versi\u00f3n SCN-IP000.03 versiones anteriores a v3.0.4, que permite a un atacante remoto hacer que el dispositivo no responda a todas las peticiones en la capa KNXnet/IP Secure, hasta que el dispositivo sea reiniciado, por medio de una trama SESSION_REQUEST con un campo de longitud total modificado" } ], "metrics": { "cvssMetricV31": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH" }, "exploitabilityScore": 3.9, "impactScore": 3.6 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8 }, "baseSeverity": "HIGH", "exploitabilityScore": 10.0, "impactScore": 6.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "NVD-CWE-noinfo" } ] } ], "configurations": [ { "operator": "AND", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.0.4", "matchCriteriaId": "D9143515-6859-4930-A3E3-9F2F77F30857" } ] }, { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": false, "criteria": "cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:*", "matchCriteriaId": "D9E68BD4-E562-4070-8314-0CC42B806282" } ] } ] }, { "operator": "AND", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.0.4", "matchCriteriaId": "4110A8E5-7EDE-4AC3-9D31-8B515FB96485" } ] }, { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": false, "criteria": "cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:*", "matchCriteriaId": "7007B312-FF99-44FD-9ECA-A99AF77F32A5" } ] } ] } ], "references": [ { "url": "https://github.com/robertguetzkow/CVE-2021-37740", "source": "cve@mitre.org", "tags": [ "Exploit", "Release Notes", "Third Party Advisory" ] }, { "url": "https://www.mdt.de/EN_IP_Interface_Router.html", "source": "cve@mitre.org", "tags": [ "Broken Link" ] }, { "url": "https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf", "source": "cve@mitre.org", "tags": [ "Release Notes", "Vendor Advisory" ] } ] }