CVE-2023-42670

Samba: ad dc busy rpc multiple listener dos

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba's RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation "classic DCs") can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as "The procedure number is out of range" when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services.

Se encontró una falla en Samba. Es susceptible a una vulnerabilidad en la que se pueden iniciar múltiples escuchas RPC incompatibles, lo que provoca interrupciones en el servicio AD DC. Cuando el servidor RPC de Samba experimenta una carga alta o no responde, los servidores destinados a fines que no son AD DC (por ejemplo, los "DC clásicos" de NT4-emulation) pueden iniciarse erróneamente y competir por los mismos sockets de dominio Unix. Este problema genera respuestas de consulta parciales del AD DC, lo que provoca problemas como "El número de procedimiento está fuera de rango" cuando se utilizan herramientas como Usuarios de Active Directory. Esta falla permite a un atacante interrumpir los servicios de AD DC.

*Credits: N/A

CVSS Scores

NISTv3.1 6.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2023-09-13 CVE Reserved
2023-10-11 CVE Published
2024-11-06 CVE Updated
2024-11-09 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (6)

URL	Tag	Source
https://access.redhat.com/security/cve/CVE-2023-42670	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2241885	Issue Tracking
https://bugzilla.samba.org/show_bug.cgi?id=15473	Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I	Mailing List
https://security.netapp.com/advisory/ntap-20231124-0002

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.samba.org/samba/security/CVE-2023-42670.html	2023-11-24

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"				< 4.17.12 Search vendor "Samba" for product "Samba" and version " < 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
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected