Bug 1978094 (CVE-2021-28166)

Summary:	CVE-2021-28166 mosquitto: crafted CONNACK message to the broker leads to null pointer dereference
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	linville, mail, richmattes
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:	2021-07-01 10:40:30 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:	1978095, 1978096, 1978097
Bug Blocks:

Description Dhananjay Arunesh 2021-07-01 06:53:15 UTC

In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.

References:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=572608

Comment 1 Dhananjay Arunesh 2021-07-01 06:53:46 UTC

Created mosquitto tracking bugs for this issue:

Affects: epel-7 [bug 1978096]
Affects: epel-8 [bug 1978097]
Affects: fedora-all [bug 1978095]

Comment 2 Product Security DevOps Team 2021-07-01 10:40:30 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.