CVE-2021-21989 : Exploit Details and Defense Strategies

VMware Workstation (16.x prior to 16.1.2) and Horizon Client for Windows (5.x prior to 5.5.2) are affected by an out-of-bounds read vulnerability in the Cortado ThinPrint component. This vulnerability could potentially lead to information disclosure when exploited by a malicious actor.

Understanding CVE-2021-21989

This section will cover what CVE-2021-21989 is, its impacts, technical details, and mitigation strategies.

What is CVE-2021-21989?

CVE-2021-21989 refers to an out-of-bounds read vulnerability in the Cortado ThinPrint component affecting VMware Workstation and Horizon Client for Windows.

The Impact of CVE-2021-21989

The vulnerability could be exploited by a malicious actor with access to a virtual machine or remote desktop, potentially resulting in information disclosure from the TPView process.

Technical Details of CVE-2021-21989

Let's delve into the specifics of the vulnerability.

Vulnerability Description

The vulnerability arises from an out-of-bounds read issue in the Cortado ThinPrint component of VMware Workstation and Horizon Client for Windows.

Affected Systems and Versions

VMware Workstation (16.x prior to 16.1.2) and Horizon Client for Windows (5.x prior to 5.5.2) are the versions impacted by this vulnerability.

Exploitation Mechanism

A malicious actor could exploit this vulnerability by accessing a virtual machine or remote desktop, leading to potential information disclosure.

Mitigation and Prevention

Learn how to protect systems from CVE-2021-21989 vulnerabilities.

Immediate Steps to Take

Immediate actions to reduce the risk of exploitation.

Long-Term Security Practices

Establishing long-term security practices to safeguard against similar vulnerabilities.

Patching and Updates

Guidance on installing patches and updates to mitigate the vulnerability.