Out-of-bounds Write Affecting grub2 package, versions <2.12~rc1-11


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-DEBIAN13-GRUB2-5927137
  • published4 Oct 2023
  • disclosed25 Oct 2023

Introduced: 4 Oct 2023

CVE-2023-4692  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Debian:13 grub2 to version 2.12~rc1-11 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2 package and not the grub2 package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

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.

CVSS Scores

version 3.1