What is the severity of CVE-2021-21868?

CVE-2021-21868 is considered a high severity vulnerability due to its potential for arbitrary command execution.

How do I fix CVE-2021-21868?

To fix CVE-2021-21868, upgrade CODESYS Development System to the latest version that includes patches addressing this vulnerability.

What software versions are affected by CVE-2021-21868?

CVE-2021-21868 affects CODESYS Development System versions 3.5.16.0 and 3.5.17.0.

What type of vulnerability is CVE-2021-21868?

CVE-2021-21868 is an unsafe deserialization vulnerability that allows for arbitrary command execution.

Can CVE-2021-21868 be exploited remotely?

Yes, CVE-2021-21868 can be exploited remotely by an attacker providing a specially crafted file.

Vulnerability/
CVE-2021-21868

high

8.8

CWE

502

18/8/2021

3/8/2024

CVE-2021-21868

First published: Wed Aug 18 2021(Updated: )

An unsafe deserialization vulnerability exists in the ObjectManager.plugin Project.get_MissingTypes() functionality of CODESYS GmbH CODESYS Development System 3.5.16 and 3.5.17. A specially crafted file can lead to arbitrary command execution. An attacker can provide a malicious file to trigger this vulnerability.

Credit: talos-cna@cisco.com

Affected Software	Affected Version	How to fix
Codesys Codesys	=3.5.16.0
Codesys Codesys	=3.5.17.0

Remedy

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download=

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-21868?
CVE-2021-21868 is considered a high severity vulnerability due to its potential for arbitrary command execution.
How do I fix CVE-2021-21868?
To fix CVE-2021-21868, upgrade CODESYS Development System to the latest version that includes patches addressing this vulnerability.
What software versions are affected by CVE-2021-21868?
CVE-2021-21868 affects CODESYS Development System versions 3.5.16.0 and 3.5.17.0.
What type of vulnerability is CVE-2021-21868?
CVE-2021-21868 is an unsafe deserialization vulnerability that allows for arbitrary command execution.
Can CVE-2021-21868 be exploited remotely?
Yes, CVE-2021-21868 can be exploited remotely by an attacker providing a specially crafted file.

collector/nvd-index
agent/type
agent/softwarecombine
collector/mitre-cve
source/MITRE
agent/author
agent/remedy
agent/references
agent/last-modified-date
agent/severity
agent/weakness
agent/description
agent/first-publish-date
agent/event
agent/tags
agent/source
vendor/codesys
canonical/codesys codesys
version/codesys codesys/3.5.16.0
version/codesys codesys/3.5.17.0

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Frequently Asked Questions

What is the severity of CVE-2021-21868?
CVE-2021-21868 is considered a high severity vulnerability due to its potential for arbitrary command execution.
How do I fix CVE-2021-21868?
To fix CVE-2021-21868, upgrade CODESYS Development System to the latest version that includes patches addressing this vulnerability.
What software versions are affected by CVE-2021-21868?
CVE-2021-21868 affects CODESYS Development System versions 3.5.16.0 and 3.5.17.0.
What type of vulnerability is CVE-2021-21868?
CVE-2021-21868 is an unsafe deserialization vulnerability that allows for arbitrary command execution.
Can CVE-2021-21868 be exploited remotely?
Yes, CVE-2021-21868 can be exploited remotely by an attacker providing a specially crafted file.