Bug 2238291 (CVE-2023-42467)

Summary:	CVE-2023-42467 QEMU: am53c974: denial of service due to division by zero
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ddepaula, jen, jferlan, jmaloy, knoel, kwolf, mrehak, mrezanin, mst, pbonzini, virt-maint, ymankad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A denial of service vulnerability was found in the qemu package. A division by zero in the scsi_disk_reset function can cause QEMU and the guest to stop immediately.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2238573, 2238578
Bug Blocks:	2238294

Description ybuenos 2023-09-11 09:15:49 UTC

QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c because scsi_disk_emulate_mode_select does not prevent s->qdev.blocksize from being 256. This stops QEMU and the guest immediately.

https://gitlab.com/thuth/qemu/-/commit/3f91104484e5bf55b56d7e1b039a4a5a17d0c1a7
https://gitlab.com/qemu-project/qemu/-/issues/1813

Comment 2 Marian Rehak 2023-09-12 13:59:57 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 2238573]

Comment 8 errata-xmlrpc 2024-04-30 09:35:43 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2135 https://access.redhat.com/errata/RHSA-2024:2135