CVE-2023-4692CWE-122

Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution

High · published October 25, 2023

CVSS v3.1
7.5
EPSS
1%
Percentile
44.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00540 · 44.6th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2023-10-25T10:27Z
EPSS history
Timeline
  • 25 OCT 10:27Z
    Grub2: out-of-bounds write at fs/ntfs.c may lead to unsigned code execution
    cvelistv5