CVE-2021-28133 : Security Advisory and Response

Zoom through 5.5.4 sometimes allows attackers to read private information on a participant's screen, even though the participant never attempted to share the private part of their screen. This exposure occurs when a user shares a specific application window, allowing other meeting participants to briefly see contents of other application windows that were not explicitly shared. The unintentional sharing may pose a severe security risk, depending on the exposed data.

Understanding CVE-2021-28133

This section delves into the details of the CVE-2021-28133 vulnerability.

What is CVE-2021-28133?

CVE-2021-28133 exposes private information on Zoom participant screens due to a flaw in the screen-sharing functionality.

The Impact of CVE-2021-28133

The vulnerability allows attackers to view content from unintended windows shared by participants, posing a risk of data exposure.

Technical Details of CVE-2021-20657

Explore the technical aspects related to CVE-2021-28133.

Vulnerability Description

Attackers can access private data from a participant's screen during Zoom meetings by exploiting the screen-sharing feature.

Affected Systems and Versions

Zoom versions up to 5.5.4 are affected by this vulnerability, potentially impacting a wide range of users.

Exploitation Mechanism

By sharing a specific application window, attackers can gain temporary access to unintended contents on participant screens.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-28133.

Immediate Steps to Take

Users should update Zoom to the latest version and avoid sharing sensitive information during meetings.

Long-Term Security Practices

Adopt secure screen-sharing habits and educate users on the importance of privacy during virtual meetings.

Patching and Updates

Regularly check for security updates from Zoom and apply them promptly to address known vulnerabilities.