Bug 1376755 (CVE-2016-7422)

Summary:	CVE-2016-7422 Qemu: virtio: null pointer dereference in virtqueu_map_desc
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ailan, amit.shah, apevec, areis, ayoung, berrange, blueknight, cfergeau, chrisw, cvsbot-xmlrpc, drjones, dwmw2, gmollett, imammedo, itamar, jen, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, sclewis, slong, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
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:	2019-06-08 02:58:43 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:	1376756, 1377517, 1476049, 1476068, 1476069, 1476072, 1476074, 1476077
Bug Blocks:	1369163, 1476084

Description Prasad Pandit 2016-09-16 10:36:23 UTC

Quick emulator(Qemu) built with the virtio framework is vulnerable to a null
pointer dereference flaw. It could occur if the guest was to set the I/O
descriptor buffer length to a large value.

A privileged user inside guest could use this flaw to crash the Qemu instance
on the host resulting in DoS.

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/09/16/4

Comment 1 Prasad Pandit 2016-09-16 10:37:01 UTC

Acknowledgments:

Name: Qinghao Tang (360.cn Marvel Team), Zhenhao Hong (360.cn Marvel Team)

Comment 2 Prasad Pandit 2016-09-16 10:40:51 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1376756]

Comment 7 errata-xmlrpc 2017-08-02 00:56:40 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)
  Red Hat OpenStack Platform 11.0 (Ocata)
  Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
  Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
  Red Hat OpenStack Platform 8.0 (Liberty)
  Red Hat OpenStack Platform 9.0 (Mitaka)

Via RHSA-2017:2408 https://access.redhat.com/errata/RHSA-2017:2408

Comment 8 errata-xmlrpc 2017-08-02 04:45:33 UTC

This issue has been addressed in the following products:

  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2017:2392 https://access.redhat.com/errata/RHSA-2017:2392