CVE-2020-3986

VMware Workstation ThinPrint EMF Out-Of-Bounds Read Information Disclosure Vulnerability

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

VMware Workstation (15.x) and Horizon Client for Windows (5.x before 5.4.4) contain an out-of-bounds read vulnerability in Cortado ThinPrint component (EMF Parser). A malicious actor with normal access to a virtual machine may be able to exploit these issues to create a partial denial-of-service condition or to leak memory from TPView process running on the system where Workstation or Horizon Client for Windows is installed.

VMware Workstation (versión 15.x) y Horizon Client para Windows (versión 5.x anteriores a 5.4.4), contienen una vulnerabilidad de lectura fuera de límites en el componente Cortado ThinPrint (Analizador EMF). Un actor malicioso con acceso normal a una máquina virtual puede explotar estos problemas para crear una condición de denegación de servicio parcial o para filtrar la memoria del proceso TPView que se ejecuta en el sistema donde está instalado Workstation o Horizon Client para Windows

This vulnerability allows local attackers to disclose sensitive information 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 parsing of EMF files in the ThinPrint component. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute code in the context of the hypervisor.

*Credits: KPC of Trend Micro Zero Day Initiative

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

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
2020-09-15 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.vmware.com/security/advisories/VMSA-2020-0020.html	2020-09-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Vmware Search vendor "Vmware"		Horizon Client Search vendor "Vmware" for product "Horizon Client"				>= 5.0.0 < 5.4.4 Search vendor "Vmware" for product "Horizon Client" and version " >= 5.0.0 < 5.4.4"		windows		Affected
Vmware Search vendor "Vmware"		Workstation Player Search vendor "Vmware" for product "Workstation Player"				>= 15.0.0 < 16.0.0 Search vendor "Vmware" for product "Workstation Player" and version " >= 15.0.0 < 16.0.0"		-		Affected
Vmware Search vendor "Vmware"		Workstation Pro Search vendor "Vmware" for product "Workstation Pro"				>= 15.0.0 < 16.0.0 Search vendor "Vmware" for product "Workstation Pro" and version " >= 15.0.0 < 16.0.0"		-		Affected