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 v3.1 NVD

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

CVSS v2.0 NVD

7.8 HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C

EPSS

4.58% chance of exploitation in the next 30 days, 92nd percentile

Published

2022-04-20

Updated

2024-08-04

Proof-of-concept exploits (1)

• robertguetzkow/CVE-2021-377406★ · 2022-07-22

Security advisories

• https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf

References

• CVE Record
• NVD entry

Related

• CVE-2021-43575