CVE-2021-20315

Severity Score

6.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A locking protection bypass flaw was found in some versions of gnome-shell as shipped within CentOS Stream 8, when the "Application menu" or "Window list" GNOME extensions are enabled. This flaw allows a physical attacker who has access to a locked system to kill existing applications and start new ones as the locked user, even if the session is still locked.

Se ha encontrado un fallo de omisión de la protección de bloqueo en algunas versiones de gnome-shell tal y como se distribuye en CentOS Stream 8, cuando las extensiones de GNOME "Application menu" o "Window list" están habilitadas. Este fallo permite a un atacante físico que tenga acceso a un sistema bloqueado matar las aplicaciones existentes e iniciar otras nuevas como el usuario bloqueado, incluso si la sesión sigue bloqueada

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2022-02-18 CVE Published
2023-09-11 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-667: Improper Locking

CAPEC

References (1)

URL	Tag	Source
https://bugzilla.redhat.com/show_bug.cgi?id=2006285	Issue Tracking

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnome Search vendor "Gnome"		Gnome-shell Search vendor "Gnome" for product "Gnome-shell"				< 3.32.2 Search vendor "Gnome" for product "Gnome-shell" and version " < 3.32.2"		-		Affected
Centos Search vendor "Centos"		Stream Search vendor "Centos" for product "Stream"				8 Search vendor "Centos" for product "Stream" and version "8"		-		Affected