Bug 986383 (CVE-2013-4153)

Summary:	CVE-2013-4153 libvirt: double free of returned JSON array in qemuAgentGetVCPUs()
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acathrow, berrange, bsarathy, clalancette, eblake, herrold, itamar, jforbes, jkurik, jyang, laine, libvirt-maint, veillard, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-07-19 16:03:35 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:	984821, 986408
Bug Blocks:	986392

Description Petr Matousek 2013-07-19 16:01:37 UTC

A part of the returned monitor response was freed twice and caused crashes of the daemon when using guest agent cpu count retrieval.

A remote user able to issue commands to libvirt daemon could use this flaw to crash libvirtd or, potentially, escalate their privilages to that of libvirtd process.

References:
https://bugzilla.redhat.com/show_bug.cgi?id=984821
https://www.redhat.com/archives/libvir-list/2013-July/msg01035.html

Acknowledgements:

This issue was discovered by Petr Krempa of Red Hat.

Comment 1 Petr Matousek 2013-07-19 16:03:35 UTC

Statement:

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

Comment 2 Petr Matousek 2013-07-19 16:11:15 UTC

Upstream fix:

http://libvirt.org/git/?p=libvirt.git;a=commit;h=dfc692350a04a70b4ca65667c30869b3bfdaf034

Comment 3 Petr Matousek 2013-07-19 17:09:59 UTC

Created libvirt tracking bugs for this issue:

Affects: fedora-all [bug 986408]