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CVE-2023-4692

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 202311-14
Posted Nov 25, 2023
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202311-14 - Multiple vulnerabilities have been discovered in GRUB, which may lead to secure boot circumvention or code execution. Versions greater than or equal to 2.06-r9 are affected.

tags | advisory, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2022-2601, CVE-2022-3775, CVE-2023-4692, CVE-2023-4693
SHA-256 | e1d6f653ba430e2e99be01237986f1d5ffba3214eb646bef34b165da21e6965d
Debian Security Advisory 5519-1
Posted Oct 9, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5519-1 - Maxim Suhanov discovered multiple vulnerabilities in GURB2's code to handle NTFS filesystems, which may result in a Secure Boot bypass.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2023-4692, CVE-2023-4693
SHA-256 | 69c6c2e6aac12f53f91896003b4bf1c34f93099bdaab89e3995c3c1a344d85ba
Ubuntu Security Notice USN-6410-1
Posted Oct 4, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6410-1 - It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds write. A local attacker could potentially use this to perform arbitrary code execution bypass and bypass secure boot protections. It was discovered that a specially crafted file system image could cause an out-of-bounds read. A physically-present attacker could possibly use this to leak sensitive information to the GRUB pager.

tags | advisory, arbitrary, local, code execution
systems | linux, ubuntu
advisories | CVE-2023-4692, CVE-2023-4693
SHA-256 | 38694ae886fc45b7444310bbce577ee7031ee22a606a28f5a7021f474d4c4ed4
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