Bug 2022094 (CVE-2021-42072)

Summary:	CVE-2021-42072 barrier: server-side implementation does not sufficiently verify the identify of connecting clients
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	dchen
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-11-10 18:57:04 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2022095, 2022096
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-11-10 18:28:26 UTC

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.

References:
https://github.com/debauchee/barrier/releases/tag/v2.4.0
http://www.openwall.com/lists/oss-security/2021/11/02/4

Comment 1 Guilherme de Almeida Suckevicz 2021-11-10 18:29:10 UTC

Created barrier tracking bugs for this issue:

Affects: epel-8 [bug 2022096]
Affects: fedora-all [bug 2022095]

Comment 2 Product Security DevOps Team 2021-11-10 18:57:02 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.