Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mdt | Scn-Ip000.03 Firmware | < 3.0.4 |
| Mdt | Scn-Ip000.03 | - |
| Mdt | Scn-Ip100.03 Firmware | < 3.0.4 |
| Mdt | Scn-Ip100.03 | - |
References
- https://github.com/robertguetzkow/CVE-2021-37740ExploitRelease NotesThird 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 NotesVendor Advisory
- https://github.com/robertguetzkow/CVE-2021-37740ExploitRelease NotesThird 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 NotesVendor Advisory
FAQ
What is CVE-2021-37740?
CVE-2021-37740 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 devic...
How severe is CVE-2021-37740?
CVE-2021-37740 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-37740?
Check the references section above for vendor advisories and patch information. Affected products include: Mdt Scn-Ip000.03 Firmware, Mdt Scn-Ip000.03, Mdt Scn-Ip100.03 Firmware, Mdt Scn-Ip100.03.