Bug 1842363 (CVE-2020-13754)

Summary:	CVE-2020-13754 QEMU: msix: OOB access during mmio operations may lead to DoS
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:	amit, berrange, cfergeau, dwmw2, itamar, jen, jferlan, jforbes, jjoyce, jlyle, jmaloy, jschluet, knoel, lhh, lpeer, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, ribarry, rjones, robinlee.sysu, sclewis, slinaber, virt-maint, virt-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	QEMU 5.0.1	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds access flaw was found in the Message Signalled Interrupt (MSI-X) device support of QEMU. This issue occurs while performing MSI-X mmio operations when a guest sent address goes beyond the mmio region. A guest user or process may use this flaw to crash the QEMU process resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-06-22 16:40:26 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:	1842364, 1842365, 1842366, 1842367, 1842368, 1842478, 1842479, 1910693, 1921959, 1921969, 1944621
Bug Blocks:	1835824

Description Prasad Pandit 2020-06-01 05:48:53 UTC

An OOB access issue was found in the Message Signalled Interrupt (MSI-X) device support of QEMU. It could occur while performing MSI-X mmio operations when a guest sent address goes beyond the mmio region. A guest user/process may use this flaw to crash the QEMU process resulting in DoS scenario.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg03732.html

Reference:
----------
  -> https://www.openwall.com/lists/oss-security/2020/06/01/6

Comment 1 Prasad Pandit 2020-06-01 05:49:06 UTC

Acknowledgments:

Name: Ren Ding (SSLab Georgia Tech), Hanqing Zhao (SSLab Georgia Tech), Alexander Bulekov, Anatoly Trosinenko

Comment 2 Prasad Pandit 2020-06-01 05:49:51 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1842364]

Comment 7 Nick Tait 2021-03-02 20:10:00 UTC

Statement:

In Red Hat OpenStack Platform, because the flaw has a lower impact and the fix would require a substantial amount of development, no update will be provided at this time for the RHOSP qemu-kvm-rhev package.

Comment 10 errata-xmlrpc 2021-06-22 14:13:39 UTC

This issue has been addressed in the following products:

  Advanced Virtualization for RHEL 8.2.1

Via RHSA-2021:2521 https://access.redhat.com/errata/RHSA-2021:2521

Comment 11 Product Security DevOps Team 2021-06-22 16:40:26 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-13754

Comment 12 errata-xmlrpc 2021-08-10 13:50:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3061 https://access.redhat.com/errata/RHSA-2021:3061