CVE-2023-4692

Public on 2023-10-06
Modified on 2024-02-01
Description
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.
Severity
Low severity
Low
CVSS v3 Base Score
2.5
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 1 grub Not Affected
Amazon Linux 2 - Core grub2 2023-10-12 ALAS2-2023-2292 Fixed
Amazon Linux 2023 grub2 2023-10-30 ALAS2023-2023-408 Fixed
Amazon Linux 2023 grub2 2023-10-30 ALAS2023-2023-409 Fixed

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 2.5 CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:N
NVD CVSSv3 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H