CVE-2021-34409

Zoom Client Installer Local Privilege Escalation

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha detectado que los paquetes de instalación de Zoom Client for Meetings para MacOS (Standard y para IT Admin) antes de la versión 5.2.0, Zoom Client Plugin for Sharing iPhone/iPad antes de la versión 5.2.0, y Zoom Rooms for Conference antes de la versión 5.1.0, copian scripts de shell previos y posteriores a la instalación en un directorio escribible por el usuario. En los productos afectados que se enumeran a continuación, un actor malintencionado con acceso local a la máquina de un usuario podría utilizar este defecto para ejecutar potencialmente comandos arbitrarios del sistema en un contexto con mayores privilegios durante el proceso de instalación

*Credits: Lockheed Martin Red Team

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-06-09 CVE Reserved
2021-09-27 CVE Published
2023-04-20 EPSS Updated
2024-09-16 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-732: Incorrect Permission Assignment for Critical Resource

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://explore.zoom.us/en/trust/security/security-bulletin	2022-10-06

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Zoom Search vendor "Zoom"		Meetings Search vendor "Zoom" for product "Meetings"				< 5.2.0 Search vendor "Zoom" for product "Meetings" and version " < 5.2.0"		macos		Affected
Zoom Search vendor "Zoom"		Rooms Search vendor "Zoom" for product "Rooms"				< 5.1.0 Search vendor "Zoom" for product "Rooms" and version " < 5.1.0"		-		Affected
Zoom Search vendor "Zoom"		Screen Sharing Search vendor "Zoom" for product "Screen Sharing"				< 5.2.0 Search vendor "Zoom" for product "Screen Sharing" and version " < 5.2.0"		ipados		Affected
Zoom Search vendor "Zoom"		Screen Sharing Search vendor "Zoom" for product "Screen Sharing"				< 5.2.0 Search vendor "Zoom" for product "Screen Sharing" and version " < 5.2.0"		iphone_os		Affected