CVE-2020-3948

VMware Workstation Virtual Printer External Control of File Name Privilege Escalation Vulnerability

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Linux Guest VMs running on VMware Workstation (15.x before 15.5.2) and Fusion (11.x before 11.5.2) contain a local privilege escalation vulnerability due to improper file permissions in Cortado Thinprint. Local attackers with non-administrative access to a Linux guest VM with virtual printing enabled may exploit this issue to elevate their privileges to root on the same guest VM.

Linux Guest VMs ejecutado en VMware Workstation (versiones 15.x anteriores a 15.5.2) y Fusion (versiones 11.x anteriores a 11.5.2), contienen una vulnerabilidad de escalada de privilegios locales debido a permisos de archivo inapropiados en Cortado Thinprint. Los atacantes locales con acceso no administrativo a una Máquina Virtual invitada de Linux con impresión virtual habilitada pueden explotar este problema para elevar sus privilegios para rootear en la misma máquina virtual invitada.

This vulnerability allows local attackers to escalate privileges on affected installations of VMware Workstation. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the Virtual Printer module. The issue results from the lack of proper validation of a user-supplied shared object file path prior to loading the file. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.

*Credits: Reno Robert of Trend Micro Zero Day Initiative

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

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-30 CVE Reserved
2020-03-13 CVE Published
2023-03-08 EPSS Updated
2024-08-04 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://www.vmware.com/security/advisories/VMSA-2020-0004.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"		Fusion Search vendor "Vmware" for product "Fusion"				>= 11.0.0 < 11.5.2 Search vendor "Vmware" for product "Fusion" and version " >= 11.0.0 < 11.5.2"		-		Affected
Vmware Search vendor "Vmware"		Workstation Search vendor "Vmware" for product "Workstation"				>= 15.0.0 < 15.5.2 Search vendor "Vmware" for product "Workstation" and version " >= 15.0.0 < 15.5.2"		-		Affected