CVE-2020-3999

VMware Workstation SetGuestInfo Null Pointer Dereference Denial-of-Service Vulnerability

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

VMware ESXi (7.0 prior to ESXi70U1c-17325551), VMware Workstation (16.x prior to 16.0 and 15.x prior to 15.5.7), VMware Fusion (12.x prior to 12.0 and 11.x prior to 11.5.7) and VMware Cloud Foundation contain a denial of service vulnerability due to improper input validation in GuestInfo. A malicious actor with normal user privilege access to a virtual machine can crash the virtual machine's vmx process leading to a denial of service condition.

VMware ESXi (versiones 7.0 anteriores a ESXi70U1c-17325551), VMware Workstation (versiones 16.x anteriores a 16.0 y versiones 15.x anteriores a 15.5.7), VMware Fusion (versiones 12.x anteriores a 12.0 y versiones 11.x anteriores a 11.5.7) y VMware Cloud Foundation contienen una vulnerabilidad de denegación de servicio debido a una comprobación inapropiada de la entrada en GuestInfo. Un actor malicioso con acceso privilegiado de usuario normal para una máquina virtual puede bloquear el proceso vmx de la máquina virtual y causar una condición de denegación de servicio

This vulnerability allows local attackers to create a denial-of-service condition on affected installations of VMware Workstation. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability.
The specific flaw exists within the implementation of the SetGuestInfo RPC function. The issue results from dereferencing a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition on the hypervisor.

*Credits: Lucas Leong (@_wmliang_) of Trend Micro's Zero Day Initiative

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-30 CVE Reserved
2020-12-18 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://www.vmware.com/security/advisories/VMSA-2020-0029.html	2021-07-21

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Vmware Search vendor "Vmware"	Fusion Search vendor "Vmware" for product "Fusion"	>= 11.5.0 < 11.5.7 Search vendor "Vmware" for product "Fusion" and version " >= 11.5.0 < 11.5.7"	-	Affected	in	Apple Search vendor "Apple"	Mac Os X Search vendor "Apple" for product "Mac Os X"	-	-	Safe
Vmware Search vendor "Vmware"		Workstation Search vendor "Vmware" for product "Workstation"				>= 15.0.0 < 15.5.7 Search vendor "Vmware" for product "Workstation" and version " >= 15.0.0 < 15.5.7"		-		Affected
Vmware Search vendor "Vmware"		Esxi Search vendor "Vmware" for product "Esxi"				>= 7.0.0 < esxi70u1c-17325551 Search vendor "Vmware" for product "Esxi" and version " >= 7.0.0 < esxi70u1c-17325551"		-		Affected