CVE-2021-21864
First published: Mon Aug 02 2021(Updated: )
A unsafe deserialization vulnerability exists in the ComponentModel ComponentManager.StartupCultureSettings 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 Development System | =3.5.16.0 | |
| CODESYS Development System | =3.5.17.0 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-21864?
CVE-2021-21864 is a unsafe deserialization vulnerability in the ComponentModel ComponentManager.StartupCultureSettings functionality of CODESYS Development System 3.5.16 and 3.5.17.
How does CVE-2021-21864 affect CODESYS Development System?
CVE-2021-21864 allows an attacker to execute arbitrary commands by providing a specially crafted file.
What is the severity rating of CVE-2021-21864?
CVE-2021-21864 has a severity rating of 7.8 (High).
How can I fix CVE-2021-21864?
To fix CVE-2021-21864, CODESYS GmbH recommends updating to the latest versions of CODESYS Development System (3.5.18 or higher) which contain the necessary security patches.
Where can I find more information about CVE-2021-21864?
You can find more information about CVE-2021-21864 at the following references: - [CodeSys Advisory](https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498941d9fda86490bca98ff21928eec08a&download=) - [Talos Intelligence](https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301)
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