CVE-2021-21864 — HIGH (7.8)

Vulnerability Description

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.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Codesys	Development System	3.5.16.0

Related Weaknesses (CWE)

CWE-502

References

https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498MitigationPatchVendor Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301ExploitThird Party Advisory
https://customers.codesys.com/index.php?eID=dumpFile&t=f&f=16805&token=ee583c498MitigationPatchVendor Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1301ExploitThird Party Advisory

FAQ

What is CVE-2021-21864?

CVE-2021-21864 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 craf...

How severe is CVE-2021-21864?

CVE-2021-21864 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-21864?

Check the references section above for vendor advisories and patch information. Affected products include: Codesys Development System.