#VU27054 Security Features in Zoom Client for Windows


Published: 2020-04-21 | Updated: 2020-06-30

Vulnerability identifier: #VU27054

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-11877

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Zoom Client 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 Client for Windows: 4.6.11 20559.0413


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


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.


Latest bulletins with this vulnerability