#VU27054 Security Features in Zoom Workplace Desktop App for Windows - CVE-2020-11877

Vulnerability identifier: #VU27054

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-11877

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zoom Workplace Desktop App for Windows
Client/Desktop applications / Office applications

Vendor: Zoom Video Communications, Inc.

Description

This vulnerability allows a remote attacker to bypass security rescritions feature.

The vulnerability exists due to the "airhost.exe" uses 3423423432325249 as the Initialization Vector (IV) for AES-256 CBC encryption. A remote attacker can gain unauthorized access to the application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Zoom Workplace Desktop App for Windows: 4.6.11 20559.0413

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External links
https://dev.io/posts/zoomzoo/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.