What is the vulnerability ID for this vulnerability?

The vulnerability ID for this vulnerability is CVE-2021-34595.

What is the severity rating of CVE-2021-34595?

The severity rating of CVE-2021-34595 is 8.1 (High).

What is the affected software for CVE-2021-34595?

The affected software for CVE-2021-34595 include CODESYS PLCWinNT (up to version 2.4.7.56) and Codesys Runtime Toolkit (up to version 2.4.7.56).

What can happen if a crafted request with invalid offsets is sent to the affected software?

A crafted request with invalid offsets may cause an out-of-bounds read or write access, resulting in a denial-of-service condition or local memory overwrite.

Is there a fix available for CVE-2021-34595?

Yes, updating CODESYS PLCWinNT and Codesys Runtime Toolkit to version 2.4.7.56 or later can fix the vulnerability.

Vulnerability/
CVE-2021-34595

high

8.1

CWE

119 823

26/10/2021

17/9/2024

CVE-2021-34595: CODESYS V2 runtime: out-of-bounds read or write access may result in denial-of-service

First published: Tue Oct 26 2021(Updated: )

A crafted request with invalid offsets may cause an out-of-bounds read or write access in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition or local memory overwrite.

Credit: info@cert.vde.com

Affected Software	Affected Version	How to fix
CODESYS PLCWinNT	<2.4.7.56
Codesys Runtime Toolkit	<2.4.7.56

Remedy

CODESYS GmbH has released the following product versions to solve the noted vulnerability issue for the affected CODESYS products: * CODESYS Runtime Toolkit 32 bit full version V2.4.7.56 * CODESYS PLCWinNT version V2.4.7.56. This will also be part of the CODESYS Development System setup version V2.3.9.68.

Never miss a vulnerability like this again

Reference Links

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16878&token=e5644ec405590e66aefa62304cb8632df9fc9e9c&download=

Frequently Asked Questions

What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2021-34595.
What is the severity rating of CVE-2021-34595?
The severity rating of CVE-2021-34595 is 8.1 (High).
What is the affected software for CVE-2021-34595?
The affected software for CVE-2021-34595 include CODESYS PLCWinNT (up to version 2.4.7.56) and Codesys Runtime Toolkit (up to version 2.4.7.56).
What can happen if a crafted request with invalid offsets is sent to the affected software?
A crafted request with invalid offsets may cause an out-of-bounds read or write access, resulting in a denial-of-service condition or local memory overwrite.
Is there a fix available for CVE-2021-34595?
Yes, updating CODESYS PLCWinNT and Codesys Runtime Toolkit to version 2.4.7.56 or later can fix the vulnerability.

collector/nvd-index
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/remedy
agent/author
agent/weakness
agent/severity
agent/title
agent/last-modified-date
agent/references
agent/tags
agent/first-publish-date
agent/description
agent/event
vendor/codesys
canonical/codesys plcwinnt
canonical/codesys runtime toolkit

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.