CVE-2021-34425 Server Side Request Forgery in Zoom Client for Meetings chat

Medium 4.7 Published 14 Dec 2021 Updated 17 Sep 2024

Attackers can trick users into sending arbitrary HTTP GET requests via chat link previews, potentially accessing internal resources.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-34425?

CVE-2021-34425 is a medium-severity server-side request forgery vulnerability in Zoom Client for Meetings for Android, published on 14 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

The Zoom Client for Meetings before version 5.7.3 (for Android, iOS, Linux, macOS, and Windows) contain a server side request forgery vulnerability in the chat\'s "link preview" functionality. In versions prior to 5.7.3, if a user were to enable the chat\'s "link preview" feature, a malicious actor could trick the user into potentially sending arbitrary HTTP GET requests to URLs that the actor cannot reach directly.

Weakness: CWE-918

Which versions are affected by CVE-2021-34425?

It affects 1 product.

Products include Zoom Meetings.

How do I fix CVE-2021-34425?

No fix has been published for CVE-2021-34425 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2021-34425 being exploited?

There is no known exploitation of CVE-2021-34425 in the wild and no public exploit code.

Sources

Also known as GHSA-8737-w627-mrv7.