What is CVE-2021-34409?

CVE-2021-34409 is a vulnerability found in the installation packages of Zoom Client for Meetings for MacOS, Zoom Client Plugin for Sharing iPhone/iPad, and Zoom Rooms for Conference.

How does CVE-2021-34409 affect Zoom?

CVE-2021-34409 affects Zoom by allowing unauthorized copying of pre- and post-installation files during installation.

Which versions of Zoom are affected by CVE-2021-34409?

Zoom Client for Meetings for MacOS version before 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad version before 5.2.0, and Zoom Rooms for Conference version before 5.1.0 are affected by CVE-2021-34409.

What is the severity rating of CVE-2021-34409?

CVE-2021-34409 has a severity rating of 7.8 (High).

How can I fix CVE-2021-34409?

To fix CVE-2021-34409, make sure to update Zoom Client for Meetings for MacOS, Zoom Client Plugin for Sharing iPhone/iPad, and Zoom Rooms for Conference to the respective versions 5.2.0 and 5.1.0 or later.

Vulnerability/
CVE-2021-34409

high

7.8

CWE

732

27/9/2021

14/12/2021

4/8/2024

CVE-2021-34409: Zoom Client Installer Local Privilege Escalation

First published: Mon Sep 27 2021(Updated: )

It was discovered that the installation packages of the Zoom Client for Meetings for MacOS (Standard and for IT Admin) installation before version 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad before version 5.2.0, and Zoom Rooms for Conference before version 5.1.0, copy pre- and post- installation shell scripts to a user-writable directory. In the affected products listed below, a malicious actor with local access to a user's machine could use this flaw to potentially run arbitrary system commands in a higher privileged context during the installation process.

Credit: security@zoom.us

Affected Software	Affected Version	How to fix
Zoom Meetings	<5.2.0
Zoom Rooms	<5.1.0
Zoom Screen Sharing	<5.2.0
Zoom Screen Sharing	<5.2.0

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Reference Links

https://explore.zoom.us/en/trust/security/security-bulletin

Frequently Asked Questions

What is CVE-2021-34409?
CVE-2021-34409 is a vulnerability found in the installation packages of Zoom Client for Meetings for MacOS, Zoom Client Plugin for Sharing iPhone/iPad, and Zoom Rooms for Conference.
How does CVE-2021-34409 affect Zoom?
CVE-2021-34409 affects Zoom by allowing unauthorized copying of pre- and post-installation files during installation.
Which versions of Zoom are affected by CVE-2021-34409?
Zoom Client for Meetings for MacOS version before 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad version before 5.2.0, and Zoom Rooms for Conference version before 5.1.0 are affected by CVE-2021-34409.
What is the severity rating of CVE-2021-34409?
CVE-2021-34409 has a severity rating of 7.8 (High).
How can I fix CVE-2021-34409?
To fix CVE-2021-34409, make sure to update Zoom Client for Meetings for MacOS, Zoom Client Plugin for Sharing iPhone/iPad, and Zoom Rooms for Conference to the respective versions 5.2.0 and 5.1.0 or later.

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