CVE-2025-59390
CriticalSummary
Apache Druid uses a weak fallback secret for its Kerberos authenticator when the `druid.auth.authenticator.kerberos.cookieSignatureSecret` configuration is not set. The secret is generated using `ThreadLocalRandom`, which is not cryptographically secure. Additionally, each process generates its own secret, leading to inconsistencies across nodes and authentication failures.
Risk Assessment
An attacker may predict or brute force the secret used to sign authentication cookies, potentially enabling token forgery or authentication bypass. Inconsistent secrets can also cause authentication failures in distributed deployments.
Recommendation
Explicitly configure a strong `druid.auth.authenticator.kerberos.cookieSignatureSecret` and upgrade Apache Druid to version 35.0.0 or later.
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Original NVD description (English source)
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. 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.ker

