Bug 2229101 (CVE-2023-4135, ZDI-CAN-21521)

Summary:	CVE-2023-4135 QEMU: NVMe: out-of-bounds read information disclosure vulnerability
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ddepaula, jen, jferlan, jmaloy, knoel, mkenneth, mrezanin, mst, pbonzini, virt-maint, ymankad
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	qemu-kvm 8.1.0	Doc Type:	If docs needed, set a value
Doc Text:	A heap out-of-bounds memory read flaw was found in the virtual nvme device in QEMU. The QEMU process does not validate an offset provided by the guest before computing a host heap pointer, which is used for copying data back to the guest. Arbitrary heap memory relative to an allocated buffer can be disclosed.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-08-04 13:04:31 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:	2229104
Bug Blocks:	2228966

Description Mauro Matteo Cascella 2023-08-04 07:46:37 UTC

A heap out of bounds memory read was found in the virtual nvme device in QEMU. An offset provided by guest is not validated by qemu process before computing a host heap pointer, which is used for copying data back to guest. Arbitrary heap memory relative to an allocated buffer can be disclosed.

ZDI security advisory:
https://www.zerodayinitiative.com/advisories/ZDI-CAN-21521

Upstream patch:
https://lists.nongnu.org/archive/html/qemu-devel/2023-08/msg00516.html

Comment 1 Mauro Matteo Cascella 2023-08-04 07:52:45 UTC

Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 2229104]

Comment 2 Product Security DevOps Team 2023-08-04 13:04:29 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-2023-4135

Comment 3 Mauro Matteo Cascella 2023-08-08 07:01:02 UTC

Upstream commit:
https://gitlab.com/qemu-project/qemu/-/commit/ecb1b7b082d3b7dceff0e486a114502fc52c0fdf