Bug 2238343 (CVE-2023-4693)

Summary:	CVE-2023-4693 grub2: out-of-bounds read at fs/ntfs.c
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	mlewando, security-response-team
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 flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.	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:	2241976
Bug Blocks:	2193203

Description Marco Benatto 2023-09-11 14:47:13 UTC

There an out-of-bounds read at fs/ntfs.c, a physically present attacker may leverage that by presenting a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack may allow sensitive data cached in memory or EFI variables values to be leaked presenting a high Confidentiality risk.

Comment 2 Marco Benatto 2023-10-03 17:54:47 UTC

Created grub2 tracking bugs for this issue:

Affects: fedora-all [bug 2241976]

Comment 3 Marco Benatto 2023-10-03 18:15:28 UTC

Upstream patch for this issue:
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00030.html

Comment 4 Marta Lewandowska 2024-03-25 08:28:52 UTC

This is duplicating https://issues.redhat.com/browse/RHEL-11569 which is now set to RELEASE PENDING. I believe this can be closed.

Comment 5 errata-xmlrpc 2024-04-30 10:54:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2456 https://access.redhat.com/errata/RHSA-2024:2456

Comment 6 errata-xmlrpc 2024-05-22 10:15:53 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3184 https://access.redhat.com/errata/RHSA-2024:3184