CVE-2021-37740

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.

CVSS v3 7.5 HIGH
CVSS v2.0 7.8 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

7.8^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:C

Exploitability : 10.0 / Impact : 6.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/robertguetzkow/CVE-2021-37740	Exploit Release Notes Third Party Advisory
https://www.mdt.de/EN_IP_Interface_Router.html	Broken Link
https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf	Release Notes Vendor Advisory
https://github.com/robertguetzkow/CVE-2021-37740	Exploit Release Notes Third Party Advisory
https://www.mdt.de/EN_IP_Interface_Router.html	Broken Link
https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf	Release Notes Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:*

History

No history.

Information

Published : 2022-04-20 20:15

Updated : 2024-11-21 06:15

NVD link : CVE-2021-37740

Mitre link : CVE-2021-37740

CVE.ORG link : CVE-2021-37740

JSON object : View

Products Affected

mdt

scn-ip100.03
scn-ip000.03_firmware
scn-ip000.03
scn-ip100.03_firmware

CWE

NVD-CWE-noinfo

{"id": "CVE-2021-37740", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "NONE"}, "acInsufInfo": false, "impactScore": 6.9, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2022-04-20T20:15:07.993", "references": [{"url": "https://github.com/robertguetzkow/CVE-2021-37740", "tags": ["Exploit", "Release Notes", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.mdt.de/EN_IP_Interface_Router.html", "tags": ["Broken Link"], "source": "cve@mitre.org"}, {"url": "https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf", "tags": ["Release Notes", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/robertguetzkow/CVE-2021-37740", "tags": ["Exploit", "Release Notes", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.mdt.de/EN_IP_Interface_Router.html", "tags": ["Broken Link"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf", "tags": ["Release Notes", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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"}], "lastModified": "2024-11-21T06:15:50.803", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D9143515-6859-4930-A3E3-9F2F77F30857", "versionEndExcluding": "3.0.4"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D9E68BD4-E562-4070-8314-0CC42B806282"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4110A8E5-7EDE-4AC3-9D31-8B515FB96485", "versionEndExcluding": "3.0.4"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7007B312-FF99-44FD-9ECA-A99AF77F32A5"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}