8.8
HIGH
CVE-2021-36799
KNX ETS Hard-coded Password Vulnerability
Description

KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

INFO

Published Date :

July 19, 2021, 5:15 p.m.

Last Modified :

Aug. 4, 2024, 1:15 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

6.0

Exploitability Score :

2.0
Public PoC/Exploit Available at Github

CVE-2021-36799 has a 6 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-2021-36799 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 Knx engineering_tool_software_5
: Total Affected Vendor : 1 | Products : 1
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-2021-36799.

URL Resource
http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html Third Party Advisory VDB Entry
https://github.com/robertguetzkow/ets5-password-recovery Third Party Advisory
https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/ Product 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: 3 weeks, 4 days 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, 1 week 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 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
soosmile/POC

None

Updated: 2 months, 3 weeks ago
8 stars 1 fork 1 watcher
Born at : June 21, 2022, 7:45 a.m. This repo has been linked 943 different CVEs too.
Profile Photo
robertguetzkow/ets5-password-recovery

ETS5 Password Recovery Tool is a PoC for CVE-2021-36799

cve poc security decryption

C#

Updated: 1 month, 3 weeks ago
30 stars 3 fork 3 watcher
Born at : July 18, 2021, 1:59 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
n0-traces/cve_monitor

Automatic monitor github cve using Github Actions

Python

Updated: 3 years ago
0 stars 56 fork 56 watcher
Born at : April 7, 2021, 11:16 a.m. This repo has been linked 1007 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-2021-36799 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-36799 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]

    Aug. 04, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 17, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Apr. 11, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Mar. 21, 2024

    Action Type Old Value New Value
    Added Tag MITRE unsupported-when-assigned
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Changed Description ** UNSUPPORTED WHEN ASSIGNED ** KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
  • Modified Analysis by [email protected]

    Dec. 15, 2021

    Action Type Old Value New Value
    Changed Reference Type http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html No Types Assigned http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html Third Party Advisory, VDB Entry
  • CVE Modified by [email protected]

    Dec. 08, 2021

    Action Type Old Value New Value
    Added Reference http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html [No Types Assigned]
  • Modified Analysis by [email protected]

    Nov. 28, 2021

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 17, 2021

    Action Type Old Value New Value
    Changed Description Hard-coded password and salt for encryption of project files in KNX Association's ETS5 (all versions up to v5.7.6) allows a local unprivileged user to access cryptographic keys of KNX devices stored in the project files via decryption with the known password "ETS5Password" and salt "Ivan Medvedev". ** UNSUPPORTED WHEN ASSIGNED ** KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
  • CVE Modified by [email protected]

    Nov. 10, 2021

    Action Type Old Value New Value
    Changed Description ** UNSUPPORTED WHEN ASSIGNED ** KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer. Hard-coded password and salt for encryption of project files in KNX Association's ETS5 (all versions up to v5.7.6) allows a local unprivileged user to access cryptographic keys of KNX devices stored in the project files via decryption with the known password "ETS5Password" and salt "Ivan Medvedev".
  • Modified Analysis by [email protected]

    Nov. 05, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:knx:engineering_tool_software_5:-:*:*:*:*:*:*:* OR *cpe:2.3:a:knx:engineering_tool_software_5:*:*:*:*:*:*:*:* versions up to (including) 5.7.6
  • CVE Modified by [email protected]

    Nov. 03, 2021

    Action Type Old Value New Value
    Changed Description Hard-coded password and salt for encryption of project files in KNX Association's ETS5 (all versions up to v5.7.6) allows a local unprivileged user to access cryptographic keys of KNX devices stored in the project files via decryption with the known password "ETS5Password" and salt "Ivan Medvedev". ** UNSUPPORTED WHEN ASSIGNED ** KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
  • CVE Modified by [email protected]

    Oct. 21, 2021

    Action Type Old Value New Value
    Changed Description KNX ETS5 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev. Hard-coded password and salt for encryption of project files in KNX Association's ETS5 (all versions up to v5.7.6) allows a local unprivileged user to access cryptographic keys of KNX devices stored in the project files via decryption with the known password "ETS5Password" and salt "Ivan Medvedev".
  • Reanalysis by [email protected]

    Jul. 30, 2021

    Action Type Old Value New Value
    Removed CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:P/I:N/A:N)
    Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • Initial Analysis by [email protected]

    Jul. 28, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/robertguetzkow/ets5-password-recovery No Types Assigned https://github.com/robertguetzkow/ets5-password-recovery Third Party Advisory
    Changed Reference Type https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/ No Types Assigned https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/ Product, Vendor Advisory
    Added CWE NIST CWE-798
    Added CPE Configuration OR *cpe:2.3:a:knx:engineering_tool_software_5:-:*:*:*:*:*:*:*
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-2021-36799 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-2021-36799 weaknesses.

Exploit Prediction

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

0.04 }} -0.00%

score

0.05474

percentile

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