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CVE-2021-34409— Zoom Client Installer Local Privilege Escalation

Quick assessment

Affected
Zoom Video Communications Inc Zoom Client for Meetings for MacOS (Standard and for IT Admin)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ZOOM Client是美国ZOOM公司的一款支持多种平台的视频会议客户端应用程序。 Zoom Client for Meetings for MacOS 5.2.0之前版本存在安全漏洞，该漏洞源于安装过程中解压的用户可写安装前和安装后脚本允许权限升级到root用户。

CVSS 7.8 · High EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-34409

Vulnerability Information
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Vulnerability Title
Zoom Client Installer Local Privilege Escalation
Source: CVE Program / CVE List V5
Vulnerability Description
It was discovered that the installation packages of the Zoom Client for Meetings for MacOS (Standard and for IT Admin) installation before version 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad before version 5.2.0, and Zoom Rooms for Conference before version 5.1.0, copy pre- and post- installation shell scripts to a user-writable directory. In the affected products listed below, a malicious actor with local access to a user's machine could use this flaw to potentially run arbitrary system commands in a higher privileged context during the installation process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ZOOM Zoom Client 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ZOOM Client是美国ZOOM公司的一款支持多种平台的视频会议客户端应用程序。 Zoom Client for Meetings for MacOS 5.2.0之前版本存在安全漏洞，该漏洞源于安装过程中解压的用户可写安装前和安装后脚本允许权限升级到root用户。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zoom Video Communications Inc Zoom Client for Meetings for MacOS (Standard and for IT Admin) unspecified ~ 5.2.0 -
Zoom Video Communications Inc Zoom Client Plugin for Sharing iPhone/iPad unspecified ~ 5.2.0 -
Zoom Video Communications Inc Zoom Rooms for Conference unspecified ~ 5.1.0 -

II. Public POCs for CVE-2021-34409

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III. Intelligence Information for CVE-2021-34409

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Other References for CVE-2021-34409 (1)

IV. Related Vulnerabilities

Same product: Zoom Client for Meetings for MacOS (Standard and for IT Admin)
Same vendor: Zoom Video Communications Inc

V. Comments for CVE-2021-34409

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