CVE-2023-4693

Grub2: out-of-bounds read at fs/ntfs.c

Severity Score

4.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.

Se encontró una falla de lectura fuera de los límites en el controlador del sistema de archivos NTFS de grub2. Este problema puede permitir que un atacante físicamente presente presente una imagen del sistema de archivos NTFS especialmente manipulada para leer ubicaciones de memoria arbitrarias. Un ataque exitoso permite que se filtren datos confidenciales almacenados en caché en la memoria o valores de variables EFI, lo que presenta un alto riesgo de confidencialidad.

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Local

Attack Complexity

High

Privileges Required

High

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-08-31 CVE Reserved
2023-10-04 CVE Published
2024-09-16 CVE Updated
2024-09-16 First Exploit
2024-10-31 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-125: Out-of-bounds Read

CAPEC

References (12)

URL	Tag	Source
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.html	Mailing List
https://seclists.org/oss-sec/2023/q4/37	Mailing List
https://security.gentoo.org/glsa/202311-14	Third Party Advisory
https://security.netapp.com/advisory/ntap-20231208-0002	Third Party Advisory

URL	Date	SRC
https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager	2024-09-16

URL	Date	SRC

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2024:2456	2024-05-22
https://access.redhat.com/errata/RHSA-2024:3184	2024-05-22
https://access.redhat.com/security/cve/CVE-2023-4693	2024-05-22
https://bugzilla.redhat.com/show_bug.cgi?id=2238343	2024-05-22

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"		Grub2 Search vendor "Gnu" for product "Grub2"				< 2.12 Search vendor "Gnu" for product "Grub2" and version " < 2.12"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				9.0 Search vendor "Redhat" for product "Enterprise Linux" and version "9.0"		-		Affected