CVE-2021-22705 : What You Need to Know

A vulnerability known as Improper Restriction of Operations within the Bounds of a Memory Buffer has been identified in Harmony HMI Products Configured by Vijeo Designer and EcoStruxure Machine Expert. This flaw could lead to denial of service or unauthorized access to system information.

Understanding CVE-2021-22705

This CVE details a security issue in the Harmony HMI products configured by specific software versions.

What is CVE-2021-22705?

The vulnerability arises from improper restriction of operations within a memory buffer, allowing attackers to cause denial of service or gain unauthorized access to system information.

The Impact of CVE-2021-22705

If exploited, this vulnerability could result in denial of service attacks or unauthorized access to sensitive system data, posing a significant security threat to affected systems.

Technical Details of CVE-2021-22705

The following sections provide more in-depth information about the vulnerability.

Vulnerability Description

The flaw stems from improper memory buffer operations, potentially leading to denial of service or unauthorized access.

Affected Systems and Versions

Harmony HMI Products Configured by Vijeo Designer (all versions prior to V6.2 SP11) or EcoStruxure Machine Expert (all versions prior to V2.0) are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability by interacting directly with a driver installed by Vijeo Designer or EcoStruxure Machine Expert to trigger denial of service or unauthorized access.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-22705, follow these recommendations:

Immediate Steps to Take

Implement patches provided by the vendor to address the vulnerability promptly.
Monitor network traffic for any signs of malicious activity.

Long-Term Security Practices

Regularly update the affected software to the latest versions to ensure protection against known vulnerabilities.
Consider network segmentation to restrict access to sensitive systems.

Patching and Updates

Stay informed about security updates from the vendor and apply patches as soon as they are available to keep systems secure.