CVE-2021-42072

Severity Score

8.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in Barrier before 2.4.0. The barriers component (aka the server-side implementation of Barrier) does not sufficiently verify the identify of connecting clients. Clients can thus exploit weaknesses in the provided protocol to cause denial-of-service or stage further attacks that could lead to information leaks or integrity corruption.

Se ha detectado un problema en Barrier versiones anteriores a 2.4.0. El componente de barreras (también se conoce como implementación del lado del servidor de Barrier) no verifica suficientemente la identificación de los clientes que se conectan. Por lo tanto, los clientes pueden aprovechar los puntos débiles del protocolo proporcionado para causar una denegación de servicio o realizar otros ataques que podrían conllevar a filtrados de información o corrupción de la integridad

*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

2021-10-07 CVE Reserved
2021-11-08 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-11-11 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-287: Improper Authentication

CAPEC

References (4)

URL	Tag	Source
https://github.com/debauchee/barrier/releases/tag/v2.4.0	Release Notes

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2021/11/02/4	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CIEVNCFEFO7L3NTM4VUZB3WKYYCBTFCI	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XMU3STOKHPEZSC54MZ42YBFFC2R3BU2Q	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Barrier Project Search vendor "Barrier Project"		Barrier Search vendor "Barrier Project" for product "Barrier"				< 2.4.0 Search vendor "Barrier Project" for product "Barrier" and version " < 2.4.0"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected