CVE-2021-34411 Explained : Impact and Mitigation

This article provides detailed information about CVE-2021-34411, a vulnerability in Zoom Rooms for Conference Room for Windows that allows local privilege escalation.

Understanding CVE-2021-34411

CVE-2021-34411 is a security vulnerability in Zoom Rooms for Conference Room for Windows that occurs during the installation process before version 5.3.0. It enables the launching of Internet Explorer with elevated privileges, leading to local privilege escalation.

What is CVE-2021-34411?

CVE-2021-34411 refers to an incorrect privilege assignment issue in Zoom Rooms for Conference Room for Windows. Attackers can exploit this vulnerability during the installation process before version 5.3.0 to launch Internet Explorer with elevated privileges, allowing for a local privilege escalation attack.

The Impact of CVE-2021-34411

The impact of CVE-2021-34411 is the potential for local privilege escalation on systems running vulnerable versions of Zoom Rooms for Conference Room for Windows. Attackers can leverage this vulnerability to gain elevated privileges on the target system.

Technical Details of CVE-2021-34411

The following technical details outline the vulnerability:

Vulnerability Description

The vulnerability in Zoom Rooms for Conference Room for Windows allows an attacker to launch Internet Explorer with elevated privileges during the installation process before version 5.3.0, resulting in local privilege escalation.

Affected Systems and Versions

All versions of Zoom Rooms for Conference Room for Windows before 5.3.0 are affected by CVE-2021-34411.

Exploitation Mechanism

Attackers can exploit this vulnerability by launching the installer with elevated privileges, such as through SCCM, leading to Internet Explorer being launched with elevated privileges and enabling the privilege escalation attack.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-34411, consider the following steps:

Immediate Steps to Take

Update Zoom Rooms for Conference Room for Windows to version 5.3.0 or later
Avoid launching installers with elevated privileges

Long-Term Security Practices

Regularly update software and applications to the latest versions
Limit user privileges to minimize the impact of potential vulnerabilities

Patching and Updates

Zoom has released version 5.3.0 to address CVE-2021-34411. Ensure timely patching and updates to protect systems against this vulnerability.