CVE-2021-22716 Explained : Impact and Mitigation

A CWE-732 vulnerability in Schneider Electric's C-Bus Toolkit (V1.15.9 and prior) could potentially lead to remote code execution when an unauthorized user modifies a file.

Understanding CVE-2021-22716

This section will delve into the details of CVE-2021-22716.

What is CVE-2021-22716?

CVE-2021-22716 refers to an Incorrect Permission Assignment for Critical Resource vulnerability in the C-Bus Toolkit, allowing unprivileged users to execute remote code by manipulating files.

The Impact of CVE-2021-22716

The vulnerability poses a high risk, with a CVSS base score of 7.8 (High), potentially resulting in severe confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-22716

This section will outline the technical aspects of CVE-2021-22716.

Vulnerability Description

The vulnerability stems from incorrect permission assignment, enabling unauthorized users to achieve remote code execution through file modifications.

Affected Systems and Versions

Schneider Electric's C-Bus Toolkit versions prior to V1.15.9 are susceptible to this vulnerability.

Exploitation Mechanism

By exploiting the CWE-732 vulnerability, attackers can manipulate files to trigger remote code execution.

Mitigation and Prevention

This section will provide guidance on mitigating and preventing CVE-2021-22716.

Immediate Steps to Take

Users are advised to update to version 1.15.9 or newer to remediate the vulnerability. Additionally, restrict access to critical resources to authorized personnel only.

Long-Term Security Practices

Implement a least privilege model, conduct regular security assessments, and educate users on file permission best practices to enhance overall security posture.

Patching and Updates

Stay informed about security advisories from Schneider Electric and apply patches promptly to address known vulnerabilities.