Bug 1553402 (CVE-2018-7858)

Summary:	CVE-2018-7858 QEMU: cirrus: OOB access when updating VGA display
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ailan, amit, apevec, areis, berrange, cfergeau, chrisw, drjones, dwmw2, imammedo, itamar, jen, jforbes, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, robinlee.sysu, sclewis, slinaber, sparks, 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:	2019-06-10 10:17:22 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:	1553403, 1553404, 1553667, 1553668, 1553669, 1553670, 1553671, 1553672, 1553673, 1553674, 1553675, 1553689, 1553690, 1566874, 1566878, 1567913
Bug Blocks:	1549764

Description Prasad Pandit 2018-03-08 19:38:21 UTC

Quick emulator(QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is
vulnerable to an out-of-bounds access issue. It could occur while updating
VGA display, after guest has adjusted the display dimensions.

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

Upstream patch:
---------------
  -> https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg02174.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2018/03/09/1

Comment 1 Prasad Pandit 2018-03-08 19:39:05 UTC

Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1553403]


Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1553404]

Comment 3 Prasad Pandit 2018-03-09 09:53:23 UTC

Acknowledgments:

Name: Ross Lagerwall (Citrix.com)

Comment 7 errata-xmlrpc 2018-05-10 16:04:48 UTC

This issue has been addressed in the following products:

  Red Hat Virtualization 4 for RHEL-7

Via RHSA-2018:1369 https://access.redhat.com/errata/RHSA-2018:1369

Comment 8 errata-xmlrpc 2018-05-14 14:36:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:1416 https://access.redhat.com/errata/RHSA-2018:1416

Comment 9 Joshua Padman 2018-06-07 04:50:20 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 8
Via RHSA-2018:1646 https://access.redhat.com/errata/RHSA-2018:1646

  Red Hat OpenStack Platform 9
Via RHSA-2018:1645 https://access.redhat.com/errata/RHSA-2018:1645

  Red Hat OpenStack Platform 10
Via RHSA-2018:1644 https://access.redhat.com/errata/RHSA-2018:1644

  Red Hat OpenStack Platform 12
Via RHSA-2018:1643 https://access.redhat.com/errata/RHSA-2018:1643

Comment 10 errata-xmlrpc 2018-07-10 17:52:19 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:2162 https://access.redhat.com/errata/RHSA-2018:2162