Weak PRNG in Ratpack versions before 1.6.1 allows session ID sequence determination

CVE-2019-11808 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:N/A:N

Ratpack versions before 1.6.1 generate a session ID using a cryptographically weak PRNG in the JDK's ThreadLocalRandom. This means that if an attacker can determine a small window for the server start time and obtain a session ID value, they can theoretically determine the sequence of session IDs.

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