Heap-based Buffer Overflow Affecting grub2-pc-modules package, versions <1:2.02-156.el8


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL8-GRUB2PCMODULES-5930488
  • published4 Oct 2023
  • disclosed3 Oct 2023

Introduced: 3 Oct 2023

CVE-2023-4692  (opens in a new tab)
CWE-122  (opens in a new tab)

How to fix?

Upgrade RHEL:8 grub2-pc-modules to version 1:2.02-156.el8 or higher.
This issue was patched in RHSA-2024:3184.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2-pc-modules package and not the grub2-pc-modules package as distributed by RHEL. See How to fix? for RHEL:8 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