What is the severity of CVE-2021-34585?

CVE-2021-34585 has been classified as a high severity vulnerability due to its potential to cause denial of service.

How do I fix CVE-2021-34585?

To fix CVE-2021-34585, update the CODESYS V2 software to version 1.1.9.22 or later.

What impact does CVE-2021-34585 have on my system?

CVE-2021-34585 can lead to a denial of service condition, rendering the web server non-responsive.

Is my version of CODESYS vulnerable to CVE-2021-34585?

If you are using CODESYS versions prior to 1.1.9.22, your system is vulnerable to CVE-2021-34585.

What type of attack can exploit CVE-2021-34585?

CVE-2021-34585 can be exploited through crafted web server requests that trigger a parser error.

Vulnerability/
CVE-2021-34585

high

7.5

CWE

252

26/10/2021

16/9/2024

CVE-2021-34585: CODESYS V2 web server: crafted requests could trigger a pointer dereference with an invalid address (DoS)

First published: Tue Oct 26 2021(Updated: )

In the CODESYS V2 web server prior to V1.1.9.22 crafted web server requests can trigger a parser error. Since the parser result is not checked under all conditions, a pointer dereference with an invalid address can occur. This leads to a denial of service situation.

Credit: info@cert.vde.com

Affected Software	Affected Version	How to fix
CODESYS Development System	<1.1.9.22

Remedy

CODESYS GmbH has released version V1.1.9.22 of the CODESYS V2 web server to solve the noted vulnerability issues. This version of the CODESYS V2 web server is also part of the CODESYS Development System setup version V2.3.9.68.

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Frequently Asked Questions

What is the severity of CVE-2021-34585?
CVE-2021-34585 has been classified as a high severity vulnerability due to its potential to cause denial of service.
How do I fix CVE-2021-34585?
To fix CVE-2021-34585, update the CODESYS V2 software to version 1.1.9.22 or later.
What impact does CVE-2021-34585 have on my system?
CVE-2021-34585 can lead to a denial of service condition, rendering the web server non-responsive.
Is my version of CODESYS vulnerable to CVE-2021-34585?
If you are using CODESYS versions prior to 1.1.9.22, your system is vulnerable to CVE-2021-34585.
What type of attack can exploit CVE-2021-34585?
CVE-2021-34585 can be exploited through crafted web server requests that trigger a parser error.

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