CVE-2022-2576: Uncontrolled Resource Consumption

July 29, 2022 (updated August 5, 2022)

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.

References

bugs.eclipse.org/580018
nvd.nist.gov/vuln/detail/CVE-2022-2576

Code Behaviors & Features

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