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Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

CVE-2019-11495

High
9.8/10

Summary

In Couchbase Server 5.1.1, the cookie used for intra-node communication was not generated securely. Couchbase Server uses erlang:now() to seed the PRNG which results in a small search space for potential random seeds that could then be used to brute force the cookie and execute code against a remote system. This has been fixed in version 6.0.0.

  • LOW
  • NETWORK
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-335 - Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

The software uses a Pseudo-Random Number Generator (PRNG) but does not correctly manage seeds.

References

Advisory Timeline

  • Published