CVE-2025-21595

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-21595
A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause an FPC to crash, leading to Denial of Service (DoS). On all Junos OS and Junos OS Evolved platforms, in an EVPN-VXLAN scenario, when specific ARP packets are received on an IPv4 network, or specific NDP packets are received on an IPv6 network, kernel heap memory leaks, which eventually leads to an FPC crash and restart. This issue does not affect MX Series platforms. Heap size growth on FPC can be seen using below command. user@host> show chassis fpc                     Temp CPU Utilization (%) CPU Utilization (%) Memory   Utilization (%) Slot State           (C) Total Interrupt     1min   5min   15min   DRAM (MB)   Heap   Buffer   0 Online           45     3         0       2       2      2       32768      19       0 <<<<<<< Heap increase in all fPCs This issue affects Junos OS: * All versions before 21.2R3-S7, * 21.4 versions before 21.4R3-S4, * 22.2 versions before 22.2R3-S1,  * 22.3 versions before 22.3R3-S1,  * 22.4 versions before 22.4R2-S2, 22.4R3. and Junos OS Evolved: * All versions before 21.2R3-S7-EVO, * 21.4-EVO versions before 21.4R3-S4-EVO, * 22.2-EVO versions before 22.2R3-S1-EVO,  * 22.3-EVO versions before 22.3R3-S1-EVO,  * 22.4-EVO versions before 22.4R3-EVO.

6.5 /10

CVSS v3 : MEDIUM

V3 Legend

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/JSA96450
Configurations

No configuration.

History

11 Apr 2025, 15:40

Type Values Removed Values Added
Summary
  • (es) Una vulnerabilidad de falta de liberación de memoria tras el tiempo de vida útil efectivo en el motor de reenvío de paquetes (PFE) de Juniper Networks Junos OS y Junos OS Evolved permite que un atacante adyacente no autenticado provoque el bloqueo de un FPC, lo que provoca una denegación de servicio (DoS). En todas las plataformas Junos OS y Junos OS Evolved, en un escenario EVPN-VXLAN, al recibir paquetes ARP específicos en una red IPv4 o paquetes NDP específicos en una red IPv6, se producen fugas de memoria en el montón del kernel, lo que finalmente provoca el bloqueo y reinicio del FPC. Este problema no afecta a las plataformas de la serie MX. El crecimiento del tamaño del montón en FPC se puede observar con el siguiente comando. user@host&gt; show chassis fpc Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%) Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer 0 Online 45 3 0 2 2 2 32768 19 0?&lt;&lt;&lt;&lt;&lt;&lt;&lt; Heap increase in all fPCs Este problema afecta a Junos OS: * Todas las versiones anteriores a 21.2R3-S7, * Versiones 21.4 anteriores a 21.4R3-S4, * Versiones 22.2 anteriores a 22.2R3-S1, * Versiones 22.3 anteriores a 22.3R3-S1, * Versiones 22.4 anteriores a 22.4R2-S2, 22.4R3. y Junos OS Evolved: * Todas las versiones anteriores a 21.2R3-S7-EVO, * Versiones 21.4-EVO anteriores a 21.4R3-S4-EVO, * Versiones 22.2-EVO anteriores a 22.2R3-S1-EVO, * Versiones 22.3-EVO anteriores a 22.3R3-S1-EVO, * Versiones 22.4-EVO anteriores a 22.4R3-EVO.

09 Apr 2025, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-04-09 20:15

Updated : 2025-04-11 15:40

NVD link : CVE-2025-21595

Mitre link : CVE-2025-21595

CVE.ORG link : CVE-2025-21595

JSON object : View

Products Affected

No product.

CWE
CWE-401

Missing Release of Memory after Effective Lifetime