CVE-2021-34596

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

Description

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.

Remediation

Solution:

  • 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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.24%
Vendor Advisory codesys.com
Affected: CODESYS CODESYS V2
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2021-34596?
CVE-2021-34596 has been scored as a medium severity vulnerability.
How to fix CVE-2021-34596?
To fix CVE-2021-34596: 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.
Is CVE-2021-34596 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-34596 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-34596?
CVE-2021-34596 affects CODESYS CODESYS V2.
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