Bug 2236613 (CVE-2023-4692) - CVE-2023-4692 grub2: Out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
Summary: CVE-2023-4692 grub2: Out-of-bounds write at fs/ntfs.c may lead to unsigned co...
Keywords:
Status: NEW
Alias: CVE-2023-4692
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2241978
Blocks: 2193203
TreeView+ depends on / blocked
 
Reported: 2023-08-31 22:03 UTC by Marco Benatto
Modified: 2024-04-30 10:54 UTC (History)
7 users (show)

Fixed In Version:
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An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result, arbitrary code execution and secure boot protection bypass may be achieved.
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2024:2456 0 None None None 2024-04-30 10:54:05 UTC

Description Marco Benatto 2023-08-31 22:03:12 UTC 
There is an out-of-bounds write in fs/ntfs.c, an attacker may leverage this vulnerability by presenting a specially crafted NTFS filesystem image leading to grub's heap metadata corruption. Additionally, in some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a result arbitrary code execution and secure boot protection bypass may be achieved.
Comment 2 Marco Benatto 2023-10-03 17:56:07 UTC 
Created grub2 tracking bugs for this issue:

Affects: fedora-all [bug 2241978]
Comment 3 Marco Benatto 2023-10-03 18:13:32 UTC 
Upstream patch for this issue:
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00029.html
Comment 4 Marta Lewandowska 2024-03-25 08:27:58 UTC 
This is duplicating https://issues.redhat.com/browse/RHEL-11567 which is already set to RELEASE PENDING. I believe this can be closed.
Comment 5 errata-xmlrpc 2024-04-30 10:54:04 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
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