Improper authentication in Zoom client and Zoom VDI

1) Improper Authentication

EUVDB-ID: #VU79137

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-39215

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Zoom Client for Windows: 5.0.0 23168.0427 - 5.15.3 18551

Zoom Client for Linux: 5.1.418436.0628 - 5.15.3 4839

Zoom Client for macOS: 5.0.0 23186.0427 - 5.15.3 20121

Virtual Desktop Infrastructure (VDI): before 5.15.5

Zoom Mobile App for Android: before 5.15.5 15154

Zoom Mobile App for iOS: before 5.15.5 9303

External links

http://explore.zoom.us/en/trust/security/security-bulletin/#ZSB-23040

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

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