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CVE-2026-33064

Estado: AnalizadaAlta (8.7)—

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to procedure panic caused by Nil Pointer Dereference in the /sdm-subscriptions endpoint. A remote attacker can cause the UDM service to panic and crash by sending a crafted POST request to the /sdm-subscriptions endpoint with a malformed URL path containing path traversal sequences (../) and a large JSON payload.

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The DataChangeNotificationProcedure function in notifier.go attempts to access a nil pointer without proper validation, causing a complete service crash with "runtime error: invalid memory address or nil pointer dereference". Exploitation would result in UDM functionality disruption until recovery by restart. This issue has been fixed in version 1.4.2.

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.

Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Free5gc — UDM

CWE

Referencias

JSON original (NVD)

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      "value": "Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to procedure panic caused by Nil Pointer Dereference in the /sdm-subscriptions endpoint. A remote attacker can cause the UDM service to panic and crash by sending a crafted POST request to the /sdm-subscriptions endpoint with a malformed URL path containing path traversal sequences (../) and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go attempts to access a nil pointer without proper validation, causing a complete service crash with \"runtime error: invalid memory address or nil pointer dereference\". Exploitation would result in UDM functionality disruption until recovery by restart. This issue has been fixed in version 1.4.2."
    },
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      "value": "Free5GC es un proyecto de código abierto de la Linux Foundation para redes centrales móviles de quinta generación (5G). Las versiones anteriores a la 1.4.2 son vulnerables a un pánico de procedimiento causado por una desreferenciación de puntero nulo (Nil Pointer Dereference) en el endpoint /sdm-subscriptions. Un atacante remoto puede causar que el servicio UDM entre en pánico y falle enviando una solicitud POST manipulada al endpoint /sdm-subscriptions con una ruta URL malformada que contenga secuencias de salto de ruta (../) y una carga útil JSON grande. La función DataChangeNotificationProcedure en notifier.go intenta acceder a un puntero nulo sin la validación adecuada, lo que provoca un fallo completo del servicio con el error 'runtime error: invalid memory address or nil pointer dereference'. La explotación resultaría en la interrupción de la funcionalidad del UDM hasta su recuperación mediante un reinicio. Este problema ha sido solucionado en la versión 1.4.2."
    }
  ],
  "lastModified": "2026-06-17T10:36:53.333",
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