CVE-2021-34420 Zoom Windows installation executable signature bypass
Attackers can bypass signature verification in the Zoom Windows installer to install malicious software on user computers.
- 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-2021-34420?
CVE-2021-34420 is a medium-severity vulnerability in Zoom Client for Meetings for Windows, published on 11 Nov 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 for Windows installer before version 5.5.4 does not properly verify the signature of files with .msi, .ps1, and .bat extensions. This could lead to a malicious actor installing malicious software on a customer’s computer.
Weakness: CWE-347
Which versions are affected by CVE-2021-34420?
It affects 1 product.
Products include Zoom Zoom Client for Meetings.
How do I fix CVE-2021-34420?
No fix has been published for CVE-2021-34420 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-34420 being exploited?
There is no known exploitation of CVE-2021-34420 in the wild and no public exploit code.
Other vulnerabilities in Zoom Client for Meetings for Windows
Sources
Also known as GHSA-xcgw-94hj-93r7.