CVE-2021-42706 Explained : Impact and Mitigation

AzeoTech DAQFactory vulnerability in WebAccess/HMI Designer

Understanding CVE-2021-42706

This CVE-2021-42706 involves a vulnerability that could permit information disclosure and arbitrary code execution on affected installations of WebAccess/MHI Designer.

What is CVE-2021-42706?

It is a high-severity vulnerability in Advantech's HMI Designer that can allow an attacker to execute arbitrary code and access confidential information.

The Impact of CVE-2021-42706

The vulnerability has a CVSS base score of 7.8 (High severity) with significant impacts on confidentiality, integrity, and availability of the affected system.

Technical Details of CVE-2021-42706

This section provides technical insights into the vulnerability.

Vulnerability Description

The vulnerability is categorized as CWE-416 (Use After Free) and allows attackers to disclose information and execute arbitrary code on affected systems.

Affected Systems and Versions

Product: HMI Designer
Vendor: Advantech
Versions affected: All versions <= 2.1.11.0

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
Privileges Required: None
User Interaction: Required

Mitigation and Prevention

Measures to mitigate and prevent exploitation of CVE-2021-42706.

Immediate Steps to Take

Update to the latest version of WebAccess HMI Designer v2.1.11.0
Direct specific queries to Advantech customer service

Long-Term Security Practices

Regular security assessments and updates
Implement network segmentation to limit attack surface
Provide security awareness training to users

Patching and Updates

Ensure timely patching of systems and applications to defend against known vulnerabilities.