Bug 1669297

Summary:	radvd: Use After Free in case of misconfiguration
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
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:	2019-03-04 05:23:24 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:	1669298
Bug Blocks:	1669299

Description Laura Pardo 2019-01-24 21:14:22 UTC

A flaw was found in radvd. In case of misconfiguration a race condition between privsep and main thread occurs. This leads to double-free and crashing of radvd.


References:
https://github.com/reubenhwk/radvd/issues/100
https://bugzilla.redhat.com/show_bug.cgi?id=1630167
https://bugzilla.redhat.com/show_bug.cgi?id=1668812

Upstream Patch:
https://github.com/reubenhwk/radvd/pull/101

Comment 1 Laura Pardo 2019-01-24 21:14:54 UTC

Created radvd tracking bugs for this issue:

Affects: fedora-all [bug 1669298]

Comment 2 Doran Moppert 2019-03-04 05:23:24 UTC

In general, mis-handling of incorrect configuration files does not constitute a security vulnerability.  The configuration file for radvd (and most daemons) is trusted input provided by the administrator.

The bugs referenced in comment#0 track the fixing of this issue in radvd.  No security handling is required.