Vulnerability · Published Apr 20, 2022 · Assigned by mitre

CVE-2021-37740

High 7.5

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.6% (higher than 92% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS NVD)7.5High

Exploit odds (30 days)4.6%top 8.3% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack tooling1Public PoC

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

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