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Linux Distros Unpatched Vulnerability : CVE-2023-4692

high Nessus Plugin ID 255444

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - 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. (CVE-2023-4692)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2023-4692

https://ubuntu.com/security/CVE-2023-4692

Plugin Details

Severity: High

ID: 255444

File Name: unpatched_CVE_2023_4692.nasl

Version: 1.3

Type: Local

Agent: unix

Family: Misc.

Published: 8/26/2025

Updated: 7/21/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.75

CVSS v2

Risk Factor: Medium

Base Score: 6.6

Temporal Score: 5.9

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:P/A:C

CVSS Score Source: CVE-2023-4692

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.4

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:canonical:ubuntu_linux:grub2-signed, p-cpe:/a:canonical:ubuntu_linux:grub2-unsigned, p-cpe:/a:centos:centos:grub2-common, p-cpe:/a:centos:centos:grub2-efi-aa64-modules, p-cpe:/a:centos:centos:grub2-efi-ia32-cdboot, p-cpe:/a:centos:centos:grub2-efi-ia32-modules, p-cpe:/a:centos:centos:grub2-efi-ia32, p-cpe:/a:centos:centos:grub2-efi-modules, p-cpe:/a:centos:centos:grub2-efi-x64-cdboot, p-cpe:/a:centos:centos:grub2-efi-x64-modules, p-cpe:/a:centos:centos:grub2-efi-x64, p-cpe:/a:centos:centos:grub2-efi, p-cpe:/a:centos:centos:grub2-pc-modules, p-cpe:/a:centos:centos:grub2-pc, p-cpe:/a:centos:centos:grub2-ppc-modules, p-cpe:/a:centos:centos:grub2-ppc64-modules, p-cpe:/a:centos:centos:grub2-ppc64, p-cpe:/a:centos:centos:grub2-ppc64le-modules, p-cpe:/a:centos:centos:grub2-ppc64le, p-cpe:/a:centos:centos:grub2-tools-extra, p-cpe:/a:centos:centos:grub2-tools-minimal, p-cpe:/a:centos:centos:grub2-tools, p-cpe:/a:centos:centos:grub2, p-cpe:/a:redhat:enterprise_linux:grub2-common, p-cpe:/a:redhat:enterprise_linux:grub2-efi-aa64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-cdboot, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-ia32, p-cpe:/a:redhat:enterprise_linux:grub2-efi-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-cdboot, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-efi-x64, p-cpe:/a:redhat:enterprise_linux:grub2-efi, p-cpe:/a:redhat:enterprise_linux:grub2-pc-modules, p-cpe:/a:redhat:enterprise_linux:grub2-pc, p-cpe:/a:redhat:enterprise_linux:grub2-ppc-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le-modules, p-cpe:/a:redhat:enterprise_linux:grub2-ppc64le, p-cpe:/a:redhat:enterprise_linux:grub2-tools-extra, p-cpe:/a:redhat:enterprise_linux:grub2-tools-minimal, p-cpe:/a:redhat:enterprise_linux:grub2-tools, p-cpe:/a:redhat:enterprise_linux:grub2

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 10/6/2023

Reference Information

CVE: CVE-2023-4692