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CVE-2021-21978 : Security Advisory and Response

Learn about CVE-2021-21978, a remote code execution vulnerability in VMware View Planner 4.x. Find out how an unauthorized attacker could exploit the flaw and steps to mitigate the risk.

VMware View Planner 4.x prior to 4.6 Security Patch 1 contains a remote code execution vulnerability due to improper input validation and lack of authorization in the logupload web application. An unauthorized attacker could upload and execute a specially crafted file, leading to remote code execution.

Understanding CVE-2021-21978

This section provides insights into the nature and impact of CVE-2021-21978.

What is CVE-2021-21978?

CVE-2021-21978 refers to a remote code execution vulnerability in VMware View Planner 4.x versions prior to 4.6 Security Patch 1. It arises from inadequate input validation and authorization controls in the logupload web application.

The Impact of CVE-2021-21978

The vulnerability allows an unauthorized remote attacker with network access to potentially upload and execute malicious files, leading to remote code execution within the logupload container.

Technical Details of CVE-2021-21978

In this section, we delve into specific technical details of the CVE.

Vulnerability Description

The vulnerability arises due to improper input validation and lack of authorization, enabling arbitrary file upload in the logupload web application of VMware View Planner.

Affected Systems and Versions

VMware View Planner 4.x versions prior to 4.6 Security Patch 1 are impacted by this vulnerability.

Exploitation Mechanism

An unauthorized attacker with network access to View Planner Harness could exploit the vulnerability by uploading and executing a specially crafted file in the logupload container.

Mitigation and Prevention

To secure your systems from CVE-2021-21978, consider the following mitigation strategies.

Immediate Steps to Take

        Apply the necessary security patch provided by VMware to update VMware View Planner to version 4.6 Security Patch 1.
        Restrict network access to affected systems and logupload application.

Long-Term Security Practices

        Regularly monitor for security advisories and updates from VMware.
        Implement robust input validation mechanisms to prevent arbitrary file uploads.
        Conduct periodic security assessments and audits to identify and remediate potential vulnerabilities.

Patching and Updates

Ensure timely application of security patches and updates to all VMware View Planner installations.

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