What is the vulnerability ID of this vulnerability?

The vulnerability ID is CVE-2021-34596.

What is the severity of CVE-2021-34596?

The severity of CVE-2021-34596 is medium with a CVSS score of 6.5.

Which software versions are affected by CVE-2021-34596?

CODESYS PLCWinNT versions up to but not including 2.4.7.56 and Codesys Runtime Toolkit versions up to but not including 2.4.7.56 are affected by CVE-2021-34596.

What is the impact of CVE-2021-34596?

CVE-2021-34596 can result in a denial-of-service condition.

Where can I find more information about CVE-2021-34596?

You can find more information about CVE-2021-34596 at the following reference link: [link](https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16878&token=e5644ec405590e66aefa62304cb8632df9fc9e9c&download=).

Vulnerability/
CVE-2021-34596

medium

6.5

CWE

824

25/10/2021

4/8/2024

CVE-2021-34596: CODESYS V2 runtime: Access of Uninitialized Pointer may result in denial-of-service

First published: Mon Oct 25 2021(Updated: )

A crafted request may cause a read access to an uninitialized pointer in CODESYS V2 Runtime Toolkit 32 Bit full and PLCWinNT prior to versions V2.4.7.56, resulting in a denial-of-service condition.

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.

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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 of this vulnerability?
The vulnerability ID is CVE-2021-34596.
What is the severity of CVE-2021-34596?
The severity of CVE-2021-34596 is medium with a CVSS score of 6.5.
Which software versions are affected by CVE-2021-34596?
CODESYS PLCWinNT versions up to but not including 2.4.7.56 and Codesys Runtime Toolkit versions up to but not including 2.4.7.56 are affected by CVE-2021-34596.
What is the impact of CVE-2021-34596?
CVE-2021-34596 can result in a denial-of-service condition.
Where can I find more information about CVE-2021-34596?
You can find more information about CVE-2021-34596 at the following reference link: [link](https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16878&token=e5644ec405590e66aefa62304cb8632df9fc9e9c&download=).

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