CVE-2021-37740 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5