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Key Exchange without Entity Authentication

CVE-2021-34433

High
7.5/10

Summary

In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.

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

CWE-322 - Key Exchange without Entity Authentication

The software performs a key exchange with an actor without verifying the identity of that actor.

References

Advisory Timeline

  • Published