Bug 1215192 (CVE-2023-42467)

Summary:	VUL-0: CVE-2023-42467: qemu,kvm: division by zero in scsi_disk_reset in hw/scsi/scsi-disk.c
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Alexander Bergmann <abergmann>
Component:	Incidents	Assignee:	Dario Faggioli <dfaggioli>
Status:	NEW ---	QA Contact:	Security Team bot <security-team>
Severity:	Normal
Priority:	P3 - Medium	CC:	dfaggioli, kvm-bugs, security-team, stoyan.manolov
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/377860/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-42467:4.4:(AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---

Description Alexander Bergmann 2023-09-11 06:54:31 UTC

CVE-2023-42467

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.

Upstream commit:
https://gitlab.com/thuth/qemu/-/commit/3f91104484e5bf55b56d7e1b039a4a5a17d0c1a7

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-42467
https://www.cve.org/CVERecord?id=CVE-2023-42467
https://gitlab.com/qemu-project/qemu/-/issues/1813