CVE-2023-4154

Samba: ad dc password exposure to privileged users and rodcs

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.

Se encontró una falla de diseño en la implementación del control DirSync de Samba, que expone contraseñas y secretos en Active Directory a usuarios privilegiados y Controladores de Dominio de Solo Lectura (RODC). Esta falla permite a los RODC y a los usuarios que poseen el derecho GET_CHANGES acceder a todos los atributos, incluidos secretos y contraseñas confidenciales. Incluso en una configuración predeterminada, las cuentas RODC DC, que solo deberían replicar algunas contraseñas, pueden obtener acceso a todos los secretos del dominio, incluido el vital krbtgt, eliminando efectivamente la distinción RODC/DC. Además, la vulnerabilidad no tiene en cuenta las condiciones de error (fallo de apertura), como situaciones de falta de memoria, lo que potencialmente otorga acceso a atributos secretos, incluso bajo la influencia de un atacante con pocos privilegios.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-08-04 CVE Reserved
2023-10-11 CVE Published
2024-08-02 CVE Updated
2024-10-07 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (5)

URL	Tag	Source
https://access.redhat.com/security/cve/CVE-2023-4154	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241883	Issue Tracking
https://security.netapp.com/advisory/ntap-20231124-0002

URL	Date	SRC

URL	Date	SRC
https://bugzilla.samba.org/show_bug.cgi?id=15424	2023-12-29

URL	Date	SRC
https://www.samba.org/samba/security/CVE-2023-4154.html	2023-12-29

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.0.0 < 4.17.12 Search vendor "Samba" for product "Samba" and version " >= 4.0.0 < 4.17.12"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.18.0 < 4.18.8 Search vendor "Samba" for product "Samba" and version " >= 4.18.0 < 4.18.8"		-		Affected
Samba Search vendor "Samba"		Samba Search vendor "Samba" for product "Samba"				>= 4.19.0 < 4.19.1 Search vendor "Samba" for product "Samba" and version " >= 4.19.0 < 4.19.1"		-		Affected