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CVE-2025-52961

Estado: AnalizadaAlta (7.1)—

An Uncontrolled Resource Consumption vulnerability in the Connectivity Fault Management (CFM) daemon and the Connectivity Fault Management Manager (cfmman) of Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS).

An attacker on an adjacent device sending specific valid traffic can cause cfmd to spike the CPU to 100% and cfmman's memory to leak, eventually to cause the FPC crash and restart.

Continued receipt and processes of these specific valid packets will sustain the Denial of Service (DoS) condition.

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An indicator of compromise is to watch for an increase in cfmman memory rising over time by issuing the following command and evaluating the RSS number. If the RSS is growing into GBs then consider restarting the device to temporarily clear memory.

user@device> show system processes node fpc<num> detail | match cfmman

Example:

show system processes node fpc0 detail | match cfmman    F S UID       PID       PPID PGID   SID   C PRI NI  ADDR SZ    WCHAN   RSS     PSR STIME TTY         TIME     CMD   4 S root      15204     1    15204  15204 0 80  0   - 90802     -      113652   4  Sep25 ?           00:15:28 /usr/bin/cfmman -p /var/pfe -o -c /usr/conf/cfmman-cfg-active.xml This issue affects Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016:

This issue does not affect Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016 before 23.2R1-EVO.

Detalles técnicos trazas, registros y código del informe original
  *  from 23.2R1-EVO before 23.2R2-S4-EVO, 
  *  from 23.4 before 23.4R2-S4-EVO, 
  *  from 24.2 before 24.2R2-EVO, 
  *  from 24.4 before 24.4R1-S2-EVO, 24.4R2-EVO.

CVSS

Probabilidad de explotación (EPSS)

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vector AV:A (red adyacente) sin autenticación → T1210. Consumo descontrolado de CPU (cfmd al 100%) y fuga de memoria en cfmman causan DoS sostenido → T1499.004 (resource exhaustion).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationFilter Network TrafficDisable or Remove Feature or Program

Tecnologías afectadas (1)

Juniper — Junos OS Evolved

CWE

Referencias

JSON original (NVD)

Mostrar
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      "value": "An Uncontrolled Resource Consumption vulnerability in the Connectivity Fault Management (CFM) daemon and the Connectivity Fault Management Manager (cfmman) of Juniper Networks Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016  allows an unauthenticated, adjacent attacker to cause a Denial-of-Service (DoS).\n\nAn attacker on an adjacent device sending specific valid traffic can cause cfmd to spike the CPU to 100% and cfmman's memory to leak, eventually to cause the FPC crash and restart.\n\nContinued receipt and processes of these specific valid packets will sustain the Denial of Service (DoS) condition.\n\nAn indicator of compromise is to watch for an increase in cfmman memory rising over time by issuing the following command and evaluating the RSS number. If the RSS is growing into GBs then consider restarting the device to temporarily clear memory.\n \n  user@device> show system processes node fpc<num> detail | match cfmman\n\nExample: \n\n  show system processes node fpc0 detail | match cfmman \n  F S UID        PID       PPID  PGID   SID   C PRI  NI  ADDR SZ    WCHAN    RSS     PSR STIME TTY          TIME     CMD\n  4 S root      15204     1    15204  15204  0  80  0   - 90802     -      113652   4  Sep25 ?           00:15:28 /usr/bin/cfmman -p /var/pfe -o -c /usr/conf/cfmman-cfg-active.xml\nThis issue affects Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016:\n\n  *  from 23.2R1-EVO before 23.2R2-S4-EVO, \n  *  from 23.4 before 23.4R2-S4-EVO, \n  *  from 24.2 before 24.2R2-EVO, \n  *  from 24.4 before 24.4R1-S2-EVO, 24.4R2-EVO.\n\n\nThis issue does not affect Junos OS Evolved on PTX10001-36MR, PTX10002-36QDD, PTX10004, PTX10008, PTX10016  before 23.2R1-EVO."
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