Bug 1838546 (CVE-2020-13253)

Summary:	CVE-2020-13253 QEMU: sd: OOB access could crash the guest resulting in DoS
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	amit, berrange, cfergeau, dbecker, dwmw2, itamar, jen, jferlan, jforbes, jjoyce, jmaloy, jschluet, kbasil, knoel, lhh, lpeer, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, philmd, ribarry, rjones, robinlee.sysu, sclewis, slinaber, virt-maint, virt-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 SD Memory Card emulator of the QEMU. This flaw occurs while performing block write commands via sdhci_write(), if a guest user has sent an 'address' which is out-of-bounds of 's->wp_groups'. 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:	2020-05-21 15:15:25 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:	1838547, 1838548, 1910697
Bug Blocks:	1836104

Description Prasad Pandit 2020-05-21 10:48:19 UTC

An out-of-bounds read access issue was found in the SD Memory Card emulator of the QEMU. It occurs while performing block write commands via sdhci_write(), if a guest user has sent 'address' which is OOB of 's->wp_groups'. A guest user/process may use this flaw to crash the QEMU process resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg05835.html

Comment 1 Prasad Pandit 2020-05-21 10:49:08 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1838547]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1838548]

Comment 2 Prasad Pandit 2020-05-21 18:32:05 UTC

Acknowledgments:

Name: Alexander Bulekov

Comment 4 Prasad Pandit 2020-05-27 07:27:30 UTC

External References:

https://bugs.launchpad.net/qemu/+bug/1880822
https://www.openwall.com/lists/oss-security/2020/05/27/2