CVE-2021-44453 : Security Advisory and Response

mySCADA myPRO: Versions 8.20.0 and prior has a vulnerable debug interface allowing OS command injection.

Understanding CVE-2021-44453

What is CVE-2021-44453?

CVE-2021-44453 is a critical vulnerability in mySCADA myPRO versions 8.20.0 and below, exposing a debug interface that permits attackers to inject arbitrary operating system commands.

The Impact of CVE-2021-44453

This vulnerability has a CVSS base score of 10, indicating a critical severity level with high impacts on confidentiality, integrity, and availability. It requires no special privileges and can be exploited over a network, making it a serious threat.

Technical Details of CVE-2021-44453

Vulnerability Description

The flaw in mySCADA myPRO allows attackers to abuse the debug interface, particularly a ping utility, to execute unauthorized OS commands.

Affected Systems and Versions

Product: myPRO
Vendor: mySCADA
Versions Affected: Up to 8.20.0

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Availability Impact: High
Privileges Required: None
Scope: Changed (potential to impact resources beyond the current user)
Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and Prevention

Immediate Steps to Take

Upgrade to mySCADA myPRO Version 8.22.0 or higher
Monitor for any unusual system behavior
Apply network segmentation to limit exposure

Long-Term Security Practices

Regularly update and patch software systems
Conduct security training for employees to recognize and report suspicious activities

Patching and Updates

Refer to vendor recommendations for the latest security updates