7.5
HIGH
CVE-2021-37740
"MDT SCN-IP Series KNXnet/IP Secure Router Denial of Service"
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.

INFO

Published Date :

April 20, 2022, 8:15 p.m.

Last Modified :

May 3, 2022, 6:07 p.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2021-37740 has a 5 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-37740 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mdt scn-ip000.03_firmware
2 Mdt scn-ip100.03_firmware
: Total Affected Vendor : 1 | Products : 2
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-37740.

URL Resource
https://github.com/robertguetzkow/CVE-2021-37740 Exploit Release Notes Third Party Advisory
https://www.mdt.de/EN_IP_Interface_Router.html Broken Link
https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf Release Notes Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
NaInSec/CVE-PoC-in-GitHub

All CVE - PoC in GitHub

poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate

Updated: 1 month, 1 week ago
5 stars 2 fork 2 watcher
Born at : March 22, 2024, 3:58 p.m. This repo has been linked 928 different CVEs too.
Profile Photo
zecool/cve

None

Updated: 6 months, 3 weeks ago
1 stars 0 fork 0 watcher
Born at : March 11, 2024, 1:21 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
WhooAmii/POC_to_review

None

Updated: 7 months, 2 weeks ago
2 stars 2 fork 2 watcher
Born at : Nov. 25, 2022, 5:43 p.m. This repo has been linked 930 different CVEs too.
Profile Photo
anquanscan/sec-tools

None

Updated: 3 weeks, 5 days ago
17 stars 5 fork 5 watcher
Born at : July 28, 2022, 3:22 a.m. This repo has been linked 149 different CVEs too.
Profile Photo
robertguetzkow/CVE-2021-37740

PoC for DoS vulnerability CVE-2021-37740 in firmware v3.0.3 of SCN-IP100.03 and SCN-IP000.03 by MDT. The bug has been fixed in firmware v3.0.4.

security poc denial-of-service cve

Python

Updated: 1 month, 2 weeks ago
5 stars 0 fork 0 watcher
Born at : April 1, 2022, 6:07 p.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-37740 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-37740 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    May. 03, 2022

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://github.com/robertguetzkow/CVE-2021-37740 No Types Assigned https://github.com/robertguetzkow/CVE-2021-37740 Exploit, Release Notes, Third Party Advisory
    Changed Reference Type https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf No Types Assigned https://www.mdt.de/download/MDT_CL_SCN_IP_03_IP_Interface_Router.pdf Release Notes, Vendor Advisory
    Changed Reference Type https://www.mdt.de/EN_IP_Interface_Router.html No Types Assigned https://www.mdt.de/EN_IP_Interface_Router.html Broken Link
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration AND OR *cpe:2.3:o:mdt:scn-ip000.03_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.4 OR cpe:2.3:h:mdt:scn-ip000.03:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:mdt:scn-ip100.03_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.4 OR cpe:2.3:h:mdt:scn-ip100.03:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-37740 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-37740 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.52 }} 0.09%

score

0.77060

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: