Bug 1987899 (CVE-2021-34432)

Summary:	CVE-2021-34432 mosquitto: DoS when client tries to send a PUBLISH packet with topic length = 0
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:	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:	2021-07-29 19:06:58 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:	1987901, 1987902
Bug Blocks:

Description Guilherme de Almeida Suckevicz 2021-07-29 16:46:31 UTC

In Eclipse Mosquitto versions 2.07 and earlier, the server will crash if the client tries to send a PUBLISH packet with topic length = 0.

Reference:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=574141

Comment 1 Guilherme de Almeida Suckevicz 2021-07-29 16:46:49 UTC

Created mosquitto tracking bugs for this issue:

Affects: epel-all [bug 1987902]
Affects: fedora-33 [bug 1987901]

Comment 2 Product Security DevOps Team 2021-07-29 19:06:58 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.