CVE-2025-52952

An Out-of-bounds Write vulnerability in the connectivity fault management (CFM) daemon of Juniper Networks Junos OS on MX Series with MPC-BUILTIN, MPC1 through MPC9 line cards allows an unauthenticated adjacent attacker to send a malformed packet to the device, leading to an FPC crash and restart, resulting in a Denial of Service (DoS). Continued receipt and processing of this packet will create a sustained Denial of Service (DoS) condition. This issue affects Juniper Networks: Junos OS: * All versions before 22.2R3-S1, * from 22.4 before 22.4R2. This feature is not enabled by default.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://supportportal.juniper.net/JSA100058
https://www.juniper.net/documentation/us/en/software/junos/network-mgmt/topics/topic-map/cfm-configuring.html

Configurations

No configuration.

History

15 Jul 2025, 13:14

Type	Values Removed	Values Added
Summary		(es) Una vulnerabilidad de escritura fuera de los límites en el daemon de gestión de fallos de conectividad (CFM) de Juniper Networks Junos OS en la serie MX con tarjetas de línea MPC-BUILTIN, MPC1 a MPC9, permite que un atacante adyacente no autenticado envíe un paquete malformado al dispositivo, lo que provoca un bloqueo y reinicio de FPC, lo que resulta en una denegación de servicio (DoS). La recepción y el procesamiento continuos de este paquete crearán una condición de denegación de servicio (DoS) sostenida. Este problema afecta a Juniper Networks: Sistema operativo Junos: * Todas las versiones anteriores a 22.2R3-S1, * Desde la versión 22.4 hasta la 22.4R2. Esta función no está habilitada por defecto.

11 Jul 2025, 15:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-07-11 15:15

Updated : 2025-07-15 13:14

NVD link : CVE-2025-52952

Mitre link : CVE-2025-52952

CVE.ORG link : CVE-2025-52952

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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