In Eclipse Californium versions 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 DTLSVERIFYPEERSONRESUMPTION_THRESHOLD values larger than 0.
{ "nvd_published_at": "2022-07-29T14:15:00Z", "github_reviewed_at": "2022-08-10T15:41:24Z", "severity": "HIGH", "github_reviewed": true, "cwe_ids": [ "CWE-408" ] }