CVE-2021-21866 Explained : Impact and Mitigation
Discover the details of CVE-2021-21866 affecting CODESYS Development System versions 3.5.16 and 3.5.17. Learn about the impact, technical aspects, and mitigation strategies.
A dangerous vulnerability has been discovered in the CODESYS Development System versions 3.5.16 and 3.5.17, allowing attackers to execute arbitrary commands through specially crafted files.
Understanding CVE-2021-21866
This CVE refers to an unsafe deserialization vulnerability within the ObjectManager.plugin ProfileInformation.ProfileData feature of the CODESYS Development System.
What is CVE-2021-21866?
The vulnerability in CODESYS Development System 3.5.16 and 3.5.17 enables threat actors to achieve arbitrary command execution by providing a malicious file.
The Impact of CVE-2021-21866
With a CVSS base score of 8.8 (High severity), this vulnerability necessitates immediate attention due to its potential for high confidentiality, integrity, and availability impacts.
Technical Details of CVE-2021-21866
Let's delve deeper into the technical aspects of this vulnerability.
Vulnerability Description
The flaw lies in the ObjectManager.plugin ProfileInformation.ProfileData feature, where untrusted data deserialization occurs, leading to unauthorized command execution.
Affected Systems and Versions
CODESYS GmbH's Development System versions 3.5.16 and 3.5.17 are affected by this vulnerability.
Exploitation Mechanism
An attacker can exploit this issue by providing a specially crafted file to trigger the deserialization vulnerability.
Mitigation and Prevention
Protecting systems from CVE-2021-21866 requires immediate action and long-term security measures.
Immediate Steps to Take
Developers and users are advised to apply security patches released by CODESYS GmbH promptly and restrict access to potentially harmful files.
Long-Term Security Practices
Implement secure coding practices, conduct regular security assessments, and educate users about safe file handling to prevent similar vulnerabilities.
Patching and Updates
Stay informed about security updates from CODESYS GmbH and ensure timely deployment to mitigate the risks associated with this vulnerability.