In Eclipse Californium version 2.0.0 to 2.7.2 and 3.0.0-3.5.0 a DTLS resumption handshake falls back to a DTLS full handshake on a parameter mismatch without using a HelloVerifyRequest. Especially, if used with certificate based cipher suites, that results in message amplification (DDoS other peers) and high CPU load (DoS own peer). The misbehavior occurs only with DTLS_VERIFY_PEERS_ON_RESUMPTION_THRESHOLD values larger than 0.
https://govanguard.com/wp-content/uploads/2018/04/Header_Logo.png 0 0 govanguard https://govanguard.com/wp-content/uploads/2018/04/Header_Logo.png govanguard2022-07-29 10:15:002022-07-29 10:15:00CVE-2022-2576 (californium)
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