CVE-2021-42796 Explained : Impact and Mitigation

An issue was discovered in ExecuteCommand() in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and prior that allows unauthenticated arbitrary commands to be executed.

Understanding CVE-2021-42796

What is CVE-2021-42796?

CVE-2021-42796 is a vulnerability found in AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and earlier, which enables unauthorized execution of arbitrary commands through the ExecuteCommand() function.

The Impact of CVE-2021-42796

This vulnerability can be exploited by attackers to execute unauthorized commands without authentication, potentially leading to system compromise, data loss, or unauthorized access to sensitive information.

Technical Details of CVE-2021-42796

Vulnerability Description

The issue lies in the ExecuteCommand() function in AVEVA Edge, enabling unauthenticated users to run arbitrary commands on affected systems.

Affected Systems and Versions

AVEVA Edge (formerly InduSoft Web Studio) versions R2020 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by sending malicious requests to the ExecuteCommand() function, bypassing authentication and gaining unauthorized control over the system.

Mitigation and Prevention

Immediate Steps to Take

Disable or restrict access to the vulnerable ExecuteCommand() function
Apply vendor-supplied patches or updates promptly
Monitor system logs for any suspicious activity indicating exploitation

Long-Term Security Practices

Conduct regular security assessments and penetration testing
Implement least privilege access controls to limit exposure to vulnerabilities
Educate users on recognizing and reporting suspicious activities

Patching and Updates

It is crucial to apply security patches and updates provided by AVEVA Edge to address the CVE-2021-42796 vulnerability and enhance the overall security posture of the system.