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 v3.0 7.5 HIGH
CVSS v2.0 7.8 HIGH

7.5^/10

CVSS v3.0 : 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://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

Advertisement

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:-:*:*:*:*:*:*:*

Information

Published : 2022-04-20 13:15

Updated : 2022-05-03 11:07

NVD link : CVE-2021-37740

Mitre link : CVE-2021-37740

JSON object : View

CWE

NVD-CWE-noinfo

Advertisement

Products Affected

mdt

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

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf", "name": "https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf", "tags": ["Release Notes", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://github.com/robertguetzkow/CVE-2021-37740", "name": "https://github.com/robertguetzkow/CVE-2021-37740", "tags": ["Exploit", "Release Notes", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.mdt.de/EN_IP_Interface_Router.html", "name": "https://www.mdt.de/EN_IP_Interface_Router.html", "tags": ["Broken Link"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-37740", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"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"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.9, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"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}}, "publishedDate": "2022-04-20T20:15Z", "configurations": {"nodes": [{"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "3.0.4"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "3.0.4"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-05-03T18:07Z"}