Bug 1015214 (CVE-2013-4399)

Summary:	CVE-2013-4399 libvirt: unprivileged user can crash libvirtd when ACLs are enabled
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acathrow, jkurik, libvirt-maint, pfrields
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libvirt 1.1.3	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-10-03 16:47:31 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:	1011429
Bug Blocks:

Description Vincent Danen 2013-10-03 16:41:54 UTC

It was discovered that an unprivileged user with read-only access to a libvirt guest could connect to it and, by disconnecting, cause a crash of the guest if the access-driver ACLs were defined in libvirtd.conf.  This was due libvirtd not removing event callbacks, which would continue to trigger after the client disconnects, which would cause predictable use of free memory, resulting in a crash.

This vulnerability was introduced in libvirt 1.1.0 and fixed in 1.1.3 [1].

[1] http://libvirt.org/git/?p=libvirt.git;a=commit;h=8294aa0c1750dcb49d6345cd9bd97bf421580d8b


Acknowledgements:

This issue was discovered by Zhenfang Wang of Red Hat.

Comment 1 Vincent Danen 2013-10-03 16:47:09 UTC

Statement:

Not vulnerable.

This issue did not affect the versions of libvirt package as shipped with Red Hat Enterprise Linux 5 and 6.