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CVE-2023-4692

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Date: October 25, 2023

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.

Language: C

Severity Score

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Heap-based Buffer Overflow

CWE-122

Top Fix

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Upgrade Version

Upgrade to version 2.02;grub-2.02

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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