CVE-2024-21593

Estado: AnalizadaAlta (7.1)—

An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).

If an attacker sends a specific MPLS packet, which upon processing, causes an internal loop, that leads to a PFE crash and restart. Continued receipt of these packets leads to a sustained Denial of Service (DoS) condition.

Circuit cross-connect (CCC) needs to be configured on the device for it to be affected by this issue.

This issue only affects MX Series with MPC10, MPC11, LC9600, and MX304.

Detalles técnicos trazas, registros y código del informe original

This issue affects:
Juniper Networks Junos OS
21.4 versions from 21.4R3 earlier than 21.4R3-S5;
22.2 versions from 22.2R2 earlier than 22.2R3-S2;
22.3 versions from 22.3R1 earlier than 22.3R2-S2;
22.3 versions from 22.3R3 earlier than 22.3R3-S1
22.4 versions from 22.4R1 earlier than 22.4R2-S2, 22.4R3;
23.2 versions earlier than 23.2R1-S1, 23.2R2.

CVSS

Versión: 4.0
Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.29%
Percentil entre todas las CVEs puntuadas: 20
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)

Juniper — Junos

CWE

CWE-703

Referencias

JSON original (NVD)

Mostrar

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      "value": "An Improper Check or Handling of Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated, adjacent attacker to cause a Denial of Service (DoS).\n\nIf an attacker sends a specific MPLS packet, which upon processing, causes an internal loop, that leads to a PFE crash and restart. Continued receipt of these packets leads to a sustained Denial of Service (DoS) condition.\n \nCircuit cross-connect (CCC) needs to be configured on the device for it to be affected by this issue.\n\nThis issue only affects MX Series with MPC10, MPC11, LC9600, and MX304.\n\nThis issue affects:\nJuniper Networks Junos OS\n21.4 versions from 21.4R3 earlier than 21.4R3-S5;\n22.2 versions from 22.2R2 earlier than 22.2R3-S2;\n22.3 versions from 22.3R1 earlier than 22.3R2-S2;\n22.3 versions from 22.3R3 earlier than 22.3R3-S1\n22.4 versions from 22.4R1 earlier than 22.4R2-S2, 22.4R3;\n23.2 versions earlier than 23.2R1-S1, 23.2R2."
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