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CVE-2025-59390

Estado: AnalizadaCrítica (9.8)—

Apache Druid’s Kerberos authenticator uses a weak fallback secret when the `druid.auth.authenticator.kerberos.cookieSignatureSecret` configuration is not explicitly set. In this case, the secret is generated using `ThreadLocalRandom`, which is not a crypto-graphically secure random number generator. This may allow an attacker to predict or brute force the secret used to sign authentication cookies, potentially enabling token forgery or authentication bypass. Additionally, each process generates its own fallback secret, resulting in inconsistent secrets across nodes.

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This causes authentication failures in distributed or multi-broker deployments, effectively leading to a incorrectly configured clusters. Users are advised to configure a strong `druid.auth.authenticator.kerberos.cookieSignatureSecret`

This issue affects Apache Druid: through 34.0.0.

Users are recommended to upgrade to version 35.0.0, which fixes the issue making it mandatory to set `druid.auth.authenticator.kerberos.cookieSignatureSecret` when using the Kerberos authenticator. Services will fail to come up if the secret is not set.

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.

Vulnerabilidad de red sin autenticación previa (AV:N/PR:N/UI:N) en Apache Druid que permite falsificar tokens de autenticación mediante predicción del secreto débil basado en ThreadLocalRandom, posibilitando bypass de autenticación y suplantación de cuentas.

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

Privileged Account ManagementUser Account ManagementPassword PoliciesMulti-factor AuthenticationApplication Developer GuidanceActive Directory Configuration

Tecnologías afectadas (1)

Apache — Druid

CWE

Referencias

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  "published": "2025-11-26T09:15:46.033",
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      "value": "Apache Druid’s Kerberos authenticator uses a weak fallback secret when the `druid.auth.authenticator.kerberos.cookieSignatureSecret` configuration is not explicitly set. In this case, the secret is generated using `ThreadLocalRandom`,\n which is not a crypto-graphically secure random number generator. This \nmay allow an attacker to predict or brute force the secret used to sign \nauthentication cookies, potentially enabling token forgery or \nauthentication bypass. Additionally, each process generates its own \nfallback secret, resulting in inconsistent secrets across nodes. This \ncauses authentication failures in distributed or multi-broker \ndeployments, effectively leading to a incorrectly configured clusters. Users are \nadvised to configure a strong `druid.auth.authenticator.kerberos.cookieSignatureSecret`\n\n\n\nThis issue affects Apache Druid: through 34.0.0.\n\nUsers are recommended to upgrade to version 35.0.0, which fixes the issue making it mandatory to set `druid.auth.authenticator.kerberos.cookieSignatureSecret` when using the Kerberos authenticator. Services will fail to come up if the secret is not set."
    },
    {
      "lang": "es",
      "value": "El autenticador Kerberos de Apache Druid utiliza un secreto de respaldo débil cuando la configuración `druid.auth.authenticator.kerberos.cookieSignatureSecret` no se establece explícitamente. En este caso, el secreto se genera utilizando `ThreadLocalRandom`, que no es un generador de números aleatorios criptográficamente seguro. Esto puede permitir a un atacante predecir o forzar por fuerza bruta el secreto utilizado para firmar las cookies de autenticación, lo que podría permitir la falsificación de tokens o eludir la autenticación. Además, cada proceso genera su propio secreto de respaldo, lo que da lugar a secretos inconsistentes entre los nodos. Esto provoca fallos de autenticación en implementaciones distribuidas o con múltiples brokers, lo que conduce efectivamente a clústeres configurados incorrectamente. Se recomienda a los usuarios que configuren un `druid.auth.authenticator.kerberos.cookieSignatureSecret` fuerte. Este problema afecta a Apache Druid: hasta la versión 34.0.0. Se recomienda a los usuarios que actualicen a la versión 35.0.0, que corrige el problema y hace obligatorio establecer `druid.auth.authenticator.kerberos.cookieSignatureSecret` cuando se utiliza el autenticador Kerberos. Los servicios no se iniciarán si no se establece el secreto."
    }
  ],
  "lastModified": "2026-06-17T09:46:04.710",
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