CVE-2021-21865 : What You Need to Know
Critical CVE-2021-21865: Unsafe deserialization vulnerability in CODESYS Development System allows arbitrary command execution. Learn how to mitigate this high-severity threat.
A unsafe deserialization vulnerability exists in the PackageManagement.plugin ExtensionMethods.Clone() functionality of CODESYS GmbH CODESYS Development System 3.5.16. This vulnerability could allow arbitrary command execution when a specially crafted file is provided, making it a critical security concern.
Understanding CVE-2021-21865
This CVE-2021-21865 vulnerability affects the CODESYS GmbH CODESYS Development System 3.5.16, allowing attackers to execute malicious commands through a specially crafted file.
What is CVE-2021-21865?
The unsafe deserialization vulnerability in CODESYS GmbH CODESYS Development System 3.5.16 can be exploited by attackers to achieve arbitrary command execution by manipulating a specific file.
The Impact of CVE-2021-21865
This vulnerability poses a high risk, with a CVSS base score of 8.8, indicating a high severity level. Attackers can exploit this flaw to compromise the confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-21865
This section delves deeper into the technical aspects of CVE-2021-21865, outlining the vulnerability description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability lies in the PackageManagement.plugin ExtensionMethods.Clone() functionality of CODESYS GmbH CODESYS Development System 3.5.16, enabling the execution of arbitrary commands through a maliciously crafted file.
Affected Systems and Versions
The vulnerability affects the CODESYS GmbH CODESYS Development System 3.5.16 version.
Exploitation Mechanism
Attackers can exploit this vulnerability by providing a specially crafted file to trigger arbitrary command execution.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-21865, immediate steps should be taken, along with implementing long-term security practices and staying updated on patches and updates.
Immediate Steps to Take
Users are advised to apply security patches provided by CODESYS to address this vulnerability immediately.
Long-Term Security Practices
Adopt security best practices such as restricting access, implementing least privilege, and conducting regular security assessments.
Patching and Updates
Regularly update the CODESYS Development System to the latest version to ensure protection against known vulnerabilities.