description: 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.
problem types: CWE-408: Incorrect Behavior Order: Early Amplification
affected:
{
product: Eclipse Californium
vendor: The Eclipse Foundation
versions:
lessThan: unspecified, status: affected, version: 2.0.0, versionType: custom
lessThanOrEqual: 2.7.2, status: affected, version: unspecified, versionType: custom
lessThan: unspecified, status: affected, version: 3.0.0, versionType: custom
lessThanOrEqual: 3.5.0, status: affected, version: unspecified, versionType: custom
}