CVE-2021-22038

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

On Windows, the uninstaller binary copies itself to a fixed temporary location, which is then executed (the originally called uninstaller exits, so it does not block the installation directory). This temporary location is not randomized and does not restrict access to Administrators only so a potential attacker could plant a binary to replace the copied binary right before it gets called, thus gaining Administrator privileges (if the original uninstaller was executed as Administrator). The vulnerability only affects Windows installers.

En Windows, el binario del desinstalador se copia a sí mismo en una ubicación temporal fija, que luego es ejecutada (el desinstalador originalmente llamado sale, por lo que no bloquea el directorio de instalación). Esta ubicación temporal no es aleatoria y no restringe el acceso sólo a administradores, por lo que un potencial atacante podría plantar un binario para reemplazar el binario copiado justo antes de que sea llamado, obteniendo así privilegios de administrador (si el desinstalador original fue ejecutado como administrador). La vulnerabilidad sólo afecta a los instaladores de Windows

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-04 CVE Reserved
2021-10-29 CVE Published
2023-05-22 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-330: Use of Insufficiently Random Values

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://blog.installbuilder.com/2021/10/installbuilder-2160-released.html	2021-11-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Vmware Search vendor "Vmware"		Installbuilder Search vendor "Vmware" for product "Installbuilder"				< 21.6.0 Search vendor "Vmware" for product "Installbuilder" and version " < 21.6.0"		windows		Affected