Bug 1917446 (CVE-2020-29443)

Summary:	CVE-2020-29443 QEMU: ide: atapi: OOB access while processing read commands
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, berrange, cfergeau, drjones, imammedo, itamar, jen, jferlan, jforbes, jmaloy, knoel, m.a.young, mkenneth, mrezanin, mst, ondrejj, pbonzini, philmd, ribarry, rjones, robinlee.sysu, 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:	An out-of-bounds read-access flaw was found in the ATAPI Emulator of QEMU. This issue occurs while processing the ATAPI read command if the logical block address(LBA) is set to an invalid value. A guest user may use this flaw to crash the QEMU process on the host resulting in a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-18 14:37:47 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:	1917447, 1917449, 1917450, 1917451, 1917452, 1921387, 1921405, 1921409, 1929009, 1937852
Bug Blocks:	1893745

Description Prasad Pandit 2021-01-18 14:03:08 UTC

An out-of-bounds read access issue was found in the ATAPI Emulator of QEMU. It occurs while processing ATAPI read command if logical block address(LBA) is set an invalid value. A guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg04255.html
  -> https://git.qemu.org/?p=qemu.git;a=commit;h=813212288970c39b1800f63e83ac6e96588095c6

Comment 1 Prasad Pandit 2021-01-18 14:03:16 UTC

Acknowledgments:

Name: Wenxiang Qian (Tencent Blade Team)

Comment 2 Prasad Pandit 2021-01-18 14:04:12 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1917447]

Comment 4 Prasad Pandit 2021-01-19 09:44:20 UTC

External References:

https://www.openwall.com/lists/oss-security/2021/01/18/2

Comment 9 Product Security DevOps Team 2021-05-18 14:37:47 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-2020-29443

Comment 10 errata-xmlrpc 2021-05-18 14:51:52 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1762 https://access.redhat.com/errata/RHSA-2021:1762

Comment 11 errata-xmlrpc 2021-06-08 22:35:17 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:2322 https://access.redhat.com/errata/RHSA-2021:2322

Comment 12 errata-xmlrpc 2021-06-23 14:16:28 UTC

This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7
  Red Hat Virtualization Engine 4.3

Via RHSA-2021:2529 https://access.redhat.com/errata/RHSA-2021:2529