CVE-2020-3990

VMware Workstation ThinPrint TTCHeader Integer Overflow Information Disclosure 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 Workstation (15.x) and Horizon Client for Windows (5.x before 5.4.4) contain an information disclosure vulnerability due to an integer overflow issue in Cortado ThinPrint component. A malicious actor with normal access to a virtual machine may be able to exploit this issue to leak memory from TPView process running on the system where Workstation or Horizon Client for Windows is installed. Exploitation is only possible if virtual printing has been enabled. This feature is not enabled by default on Workstation but it is enabled by default on Horizon Client.

VMware Workstation (versión 15.x) y Horizon Client para Windows (versiones 5.x anteriores a 5.4.4), contienen una vulnerabilidad de divulgación de información debido a un problema de desbordamiento de enteros en el componente Cortado ThinPrint. Un actor malicioso con acceso normal a una máquina virtual puede ser capaz de explotar este problema para filtrar la memoria del proceso TPView que se ejecuta en el sistema donde está instalado Workstation o Horizon Client para Windows. La explotación solo es posible si la impresión virtual ha sido habilitada. Esta función no está habilitada por defecto en Workstation, pero está habilitada por defecto en Horizon Client

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 ThinPrint component. Crafted data in a font file can result in an integer overflow before reading from memory. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the hypervisor.

*Credits: linhlhq of VinCSS (Member of Vingroup)

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

None

* 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
CWE-190: Integer Overflow or Wraparound

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	2021-07-21

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