Bug 1456507 (CVE-2017-7650)

Summary:	CVE-2017-7650 mosquitto: Pattern based ACLs can be bypassed
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	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:	mosquitto 1.4.12	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-05-05 10:19:12 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:	1456508, 1456509
Bug Blocks:

Description Andrej Nemec 2017-05-29 13:42:11 UTC

A vulnerability exists in Mosquitto versions 0.15 to 1.4.11.

Pattern based ACLs can be bypassed by clients that set their username/client id to ‘#’ or ‘+’. This allows locally or remotely connected clients to access MQTT topics that they do have the rights to. The same issue may be present in third party authentication/access control plugins for Mosquitto.

The vulnerability only comes into effect where pattern based ACLs are in use, or potentially where third party plugins are in use.

External References:

http://mosquitto.org/2017/05/security-advisory-cve-2017-7650/

Comment 1 Andrej Nemec 2017-05-29 13:42:40 UTC

Created mosquitto tracking bugs for this issue:

Affects: epel-7 [bug 1456509]
Affects: fedora-all [bug 1456508]