Bug 1696312 (CVE-2018-12551)

Summary:	CVE-2018-12551 mosquitto: improper authentication in password file
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
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:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-05-09 16:07:38 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:	1696315, 1696317
Bug Blocks:

Description Dhananjay Arunesh 2019-04-04 14:08:37 UTC

When Eclipse Mosquitto version 1.0 to 1.5.5 (inclusive) is configured to use a password file for authentication, any malformed data in the password file will be treated as valid. This typically means that the malformed data becomes a username and no password. If this occurs, clients can circumvent authentication and get access to the broker by using the malformed username. In particular, a blank line will be treated as a valid empty username. Other security measures are unaffected. Users who have only used the mosquitto_passwd utility to create and modify their password files are unaffected by this vulnerability.

Reference:
https://bugs.eclipse.org/bugs/show_bug.cgi?id=543401

Comment 1 Dhananjay Arunesh 2019-04-04 14:19:11 UTC

Created mosquitto tracking bugs for this issue:

Affects: fedora-29 [bug 1696315]

Comment 2 Dhananjay Arunesh 2019-04-04 14:19:39 UTC

Created mosquitto tracking bugs for this issue:

Affects: epel-7 [bug 1696317]