CVE-2021-21985

VMware vCenter Server Improper Input Validation Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

*SSVC

Descriptions

The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.

VSphere Client (HTML5) contiene una vulnerabilidad de ejecución de código remota debido a una falta de comprobación de entrada en el plugin Virtual SAN Health Check, que está habilitado por defecto en vCenter Server. Un actor malicioso con acceso de red al puerto 443 puede explotar este problema para ejecutar comandos con privilegios ilimitados en el sistema operativo subyacente que aloja a vCenter Server

VMware vSphere Client contains an improper input validation vulnerability in the Virtual SAN Health Check plug-in, which is enabled by default in vCenter Server, which allows for remote code execution.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

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

2021-01-04 CVE Reserved
2021-05-26 CVE Published
2021-05-27 First Exploit
2021-11-03 Exploited in Wild
2021-11-17 KEV Due Date
2024-08-03 CVE Updated
2024-10-29 EPSS Updated

CWE

CWE-20: Improper Input Validation

CAPEC

References (15)

URL	Tag	Source
http://packetstormsecurity.com/files/162812/VMware-Security-Advisory-2021-0010.html	Third Party Advisory
https://attackerkb.com/topics/X85GKjaVER/cve-2021-21985#rapid7-analysis
http://noahblog.360.cn/vcenter-cve-2021-2021-21985
https://www.iswin.org/2021/06/02/Vcenter-Server-CVE-2021-21985-RCE-PAYLOAD
https://testbnull.medium.com/a-quick-look-at-cve-2021-21985-vcenter-pre-auth-rce-9ecd459150a5
https://y4y.space/2021/06/04/learning-jndi-injection-from-cve-2021-21985
https://github.com/alt3kx/CVE-2021-21985_PoC

URL	Date	SRC
https://github.com/daedalus/CVE-2021-21985	2021-06-04
https://github.com/onSec-fr/CVE-2021-21985-Checker	2021-06-01
https://github.com/aristosMiliaressis/CVE-2021-21985	2021-07-11
https://github.com/bigbroke/CVE-2021-21985	2021-05-27
https://github.com/mauricelambert/CVE-2021-21985	2021-06-01
https://github.com/haidv35/CVE-2021-21985	2021-07-12
http://packetstormsecurity.com/files/163487/VMware-vCenter-Server-Virtual-SAN-Health-Check-Remote-Code-Execution.html	2024-08-03

URL	Date	SRC

URL	Date	SRC
https://www.vmware.com/security/advisories/VMSA-2021-0010.html	2021-05-25

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		-		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		a		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		c		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		e		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		f		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update1		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update1b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update1c		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update1d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update1e		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update1g		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update2		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update2b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update2c		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update2d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update2g		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update3		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update3d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update3f		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update3k		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.5 Search vendor "Vmware" for product "Vcenter Server" and version "6.5"		update3n		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		-		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		a		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update1		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update1b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update2		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update2a		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update2c		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3a		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3f		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3g		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3j		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3l		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				6.7 Search vendor "Vmware" for product "Vcenter Server" and version "6.7"		update3m		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		-		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		a		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		b		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		c		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		update1		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		update1a		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		update1c		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		update1d		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		update2		Affected
Vmware Search vendor "Vmware"		Vcenter Server Search vendor "Vmware" for product "Vcenter Server"				7.0 Search vendor "Vmware" for product "Vcenter Server" and version "7.0"		update2a		Affected
Vmware Search vendor "Vmware"		Cloud Foundation Search vendor "Vmware" for product "Cloud Foundation"				>= 3.0 < 3.10.2.1 Search vendor "Vmware" for product "Cloud Foundation" and version " >= 3.0 < 3.10.2.1"		-		Affected
Vmware Search vendor "Vmware"		Cloud Foundation Search vendor "Vmware" for product "Cloud Foundation"				>= 4.0 < 4.2.1 Search vendor "Vmware" for product "Cloud Foundation" and version " >= 4.0 < 4.2.1"		-		Affected