CVE-2021-37740

HIGH

MDT Scn-ip000.03 Firmware < 3.0.4 - Denial of Service

Title source: rule
STIX 2.1

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.

Exploits (1)

nomisec WORKING POC 6 stars
by robertguetzkow · poc
https://github.com/robertguetzkow/CVE-2021-37740

References (3)

Core 3
Core References
Broken Link x_refsource_misc
https://www.mdt.de/EN_IP_Interface_Router.html
Release Notes, Vendor Advisory x_refsource_misc
https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf
Exploit, Release Notes, Third Party Advisory x_refsource_misc
https://github.com/robertguetzkow/CVE-2021-37740

Scores

CVSS v3 7.5
EPSS 0.1997
EPSS Percentile 95.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

Status published
Products (2)
mdt/scn-ip000.03_firmware < 3.0.4
mdt/scn-ip100.03_firmware < 3.0.4
Published Apr 20, 2022
Tracked Since Feb 18, 2026