Bug 1663929

Summary:	monit: Use-after-free in function _handleEvent()
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bryanlharris, michel, s.adam
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:	2019-06-10 10:44:45 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:	1663930, 1663931
Bug Blocks:

Description Andrej Nemec 2019-01-07 10:21:37 UTC

Monit may crash if "unmonitor" or "stop" action was triggered by some test: the _handleAction() will call Util_monitorUnset() which frees the service events list, including the current event which triggered the action. The reset of the state_change flag (which is not necessary) then dereferenced a freed event.

References:

https://bitbucket.org/tildeslash/monit/issues/764/use-after-free-in-function-_handleevent
https://seclists.org/oss-sec/2018/q4/274

Upstream patch:

https://bitbucket.org/tildeslash/monit/commits/5827927c4623

Comment 1 Andrej Nemec 2019-01-07 10:21:47 UTC

Created monit tracking bugs for this issue:

Affects: epel-all [bug 1663931]
Affects: fedora-all [bug 1663930]

Comment 2 Product Security DevOps Team 2019-06-10 10:44:45 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.