CVE-2021-37740 - Vulnerability Details - OpenCVE

Description

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.

Published: 2022-04-20

Score: 7.5 High

EPSS: 4.5% Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

AND

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

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

Configuration 2 [-]

AND

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

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

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.04511.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/robertguetzkow/CVE-2021-37740
https://www.mdt.de/EN_IP_Interface_Router.html
https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf

History

No history.

Subscriptions

Mdt Scn-ip000.03 Scn-ip000.03 Firmware Scn-ip100.03 Scn-ip100.03 Firmware

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2022-04-20T19:31:19.000Z

Updated: 2024-08-04T01:30:07.493Z

Reserved: 2021-07-30T00:00:00.000Z

Link: CVE-2021-37740

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-04-20T20:15:07.993

Modified: 2026-06-17T04:01:05.323

Link: CVE-2021-37740

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

NVD-CWE-noinfo

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