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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 4.58% probability · 91th percentile
- CISA KEV
- Not listed
- Affected
- mdt/scn-ip000.03 firmware · mdt/scn-ip100.03 firmware
- Source
- cve@mitre.org
References
- https://github.com/robertguetzkow/CVE-2021-37740Exploit, Release Notes, Third Party Advisory
- https://www.mdt.de/EN_IP_Interface_Router.htmlBroken Link
- https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdfRelease Notes, Vendor Advisory
- https://github.com/robertguetzkow/CVE-2021-37740Exploit, Release Notes, Third Party Advisory
- https://www.mdt.de/EN_IP_Interface_Router.htmlBroken Link
- https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdfRelease Notes, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.