CVE-2021-31367
Estado: ModificadaMedia (6.5)—
A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows an adjacent attacker to cause a Denial of Service (DoS) by sending genuine BGP flowspec packets which cause an FPC heap memory leak. Once having run out of memory the FPC will crash and restart along with a core dump. Continued receipted of these packets will create a sustained Denial of Service (DoS) condition.
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This issue affects: Juniper Networks Junos OS All versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R3-S6; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos Evolved is not affected.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 6.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.40%
- Percentil entre todas las CVEs puntuadas: 32
- Fecha de la puntuación: 7/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-401
- CWE-401
Referencias
JSON original (NVD)
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"value": "A Missing Release of Memory after Effective Lifetime vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on PTX Series allows an adjacent attacker to cause a Denial of Service (DoS) by sending genuine BGP flowspec packets which cause an FPC heap memory leak. Once having run out of memory the FPC will crash and restart along with a core dump. Continued receipted of these packets will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S3; 19.4 versions prior to 19.4R1-S4, 19.4R3-S6; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3-S1; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos Evolved is not affected."
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"value": "Una vulnerabilidad de Falta de Liberación de Memoria después del Tiempo de Vida Efectivo en el Motor de Reenvío de Paquetes (PFE) de Juniper Networks Junos OS en la serie PTX permite a un atacante adyacente causar una Denegación de Servicio (DoS) mediante el envío de paquetes BGP flowspec auténticos que causan una pérdida de memoria de la pila de FPC. Una vez que se haya agotado la memoria, el FPC se bloqueará y se reiniciará junto con un volcado del núcleo. Una recepción continuada de estos paquetes creará una condición sostenida de Denegación de Servicio (DoS). Este problema afecta a: Juniper Networks Junos OS Todas las versiones anteriores a 18.4R3-S9; versiones 19.1 anteriores a 19.1R3-S7; versiones 19.2 anteriores a 19.2R1-S7, 19.2R3-S3; versiones 19.3 anteriores a 19.3R2-S6, 19.3R3-S3; versiones 19.4 anteriores a 19. 4R1-S4, 19.4R3-S6; versiones 20.1 anteriores a 20.1R2-S2, 20.1R3; versiones 20.2 anteriores a 20.2R3-S1; versiones 20.3 anteriores a 20.3R3; versiones 20.4 anteriores a 20.4R3; versiones 21.1 anteriores a 21.1R2. Juniper Networks Junos Evolved no está afectado"
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"lastModified": "2026-06-17T03:51:38.853",
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