Bug 1753846 (CVE-2019-11779)

Summary:	CVE-2019-11779 mosquitto: malicious MQTT sends SUBSCRIBE packet leads to stack over flow
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:	2019-09-20 06:45:39 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:	1753847, 1753848
Bug Blocks:

Description Dhananjay Arunesh 2019-09-20 04:54:20 UTC

In Eclipse Mosquitto 1.5.0 to 1.6.5 inclusive, if a malicious MQTT client sends a SUBSCRIBE packet containing a topic that consists of approximately 65400 or more '/' characters, i.e. the topic hierarchy separator, then a stack overflow will occur.

Reference:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=551160

Comment 1 Dhananjay Arunesh 2019-09-20 04:54:37 UTC

Created mosquitto tracking bugs for this issue:

Affects: epel-7 [bug 1753848]
Affects: fedora-all [bug 1753847]

Comment 2 Product Security DevOps Team 2019-09-20 06:45:39 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.