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CVE-2021-21997 : Vulnerability Insights and Analysis

Discover the impact of CVE-2021-21997, a DoS vulnerability in VMware Tools for Windows (11.x.y prior to 11.3.0). Learn about affected versions, exploitation, and mitigation steps.

VMware Tools for Windows (11.x.y prior to 11.3.0) is affected by a denial-of-service vulnerability in the VM3DMP driver, allowing a malicious actor with local user privileges in the Windows guest operating system to trigger a PANIC in the VM3DMP driver, resulting in a denial-of-service condition.

Understanding CVE-2021-21997

This section provides insights into the CVE-2021-21997 vulnerability affecting VMware Tools for Windows.

What is CVE-2021-21997?

CVE-2021-21997 is a denial-of-service vulnerability found in the VM3DMP driver of VMware Tools for Windows (11.x.y prior to 11.3.0). It can be exploited by a local user to cause a denial-of-service condition.

The Impact of CVE-2021-21997

The impact of this vulnerability is severe as it allows a local user to trigger a denial-of-service condition in the Windows guest operating system where VMware Tools is installed.

Technical Details of CVE-2021-21997

This section elaborates on the technical aspects of CVE-2021-21997.

Vulnerability Description

The vulnerability lies in the VM3DMP driver of VMware Tools for Windows (11.x.y prior to 11.3.0) and enables a local user to perform a denial-of-service attack.

Affected Systems and Versions

VMware Tools for Windows versions 11.x.y prior to 11.3.0 are vulnerable to this attack.

Exploitation Mechanism

A malicious actor with local user privileges in the Windows guest OS can exploit the vulnerability by triggering a PANIC in the VM3DMP driver.

Mitigation and Prevention

Explore the strategies to mitigate the risks posed by CVE-2021-21997.

Immediate Steps to Take

Users are advised to update VMware Tools for Windows to version 11.3.0 or higher to patch the vulnerability.

Long-Term Security Practices

Regularly update software and implement security best practices to prevent such vulnerabilities.

Patching and Updates

Stay informed about security advisories and promptly apply patches to safeguard against potential threats.

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