{"id":"CVE-2022-2576","aliases":["EUVD-2022-6404","GHSA-qq3j-44gw-cf6r"],"status":"published","title":"Eclipse Californium denial of service (DoS) via Datagram Transport Layer Security (DTLS) handshake on parameter mismatch","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00606,"percentile":0.49263,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-408"],"published":"2022-07-29T13:20:10Z","modified":"2026-10-28T02:30:39Z","fixes":[{"ecosystem":"Maven","package":"org.eclipse.californium:californium-core","fixed_in":["2.7.3","3.6.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"org.eclipse.californium:californium-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"last_affected":"2.7.2"},{"fixed":"2.7.3"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"org.eclipse.californium:californium-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"last_affected":"3.5.0"},{"fixed":"3.6.0"}]}]},{"source":"osv","ecosystem":"Maven","package":"org.eclipse.californium:californium-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.7.3"}]}],"versions":["2.0.0","2.1.0","2.1.0-RC1","2.1.0-RC2","2.2.0","2.2.0-RC1","2.2.1","2.2.2","2.2.3","2.3.0","2.3.0-RC1","2.3.0-RC2","2.3.1","2.4.0","2.4.1","2.5.0","2.6.0","2.6.1","2.6.2","2.6.3","2.6.4","2.6.5","2.6.6","2.7.0","2.7.1","2.7.2"]},{"source":"osv","ecosystem":"Maven","package":"org.eclipse.californium:californium-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.0.0"},{"fixed":"3.6.0"}]}],"versions":["3.0.0","3.1.0","3.2.0","3.3.0","3.3.1","3.4.0","3.5.0"]}],"products":[{"vendor":"eclipse","product":"californium"},{"vendor":"the eclipse foundation","product":"eclipse californium"}],"references":[{"url":"https://bugs.eclipse.org/580018","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-2576","tags":["advisory"]},{"url":"https://github.com/eclipse-californium/californium/pull/2039","tags":["web"]},{"url":"https://github.com/eclipse-californium/californium/commit/0cc953a1dc071efc960130e229fcb4f8bda7f9df","tags":["web"]},{"url":"https://github.com/eclipse-californium/californium/commit/8373db84b2d07f22c39ffc333ab881dba9401722","tags":["web"]},{"url":"https://github.com/advisories/GHSA-qq3j-44gw-cf6r"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/2xxx/CVE-2022-2576.json","tags":["advisory"]},{"url":"https://github.com/eclipse/californium","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2022-2576","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.","status":"published","published":"2022-07-29T13:20:10Z","modified":"2024-08-03T00:39:08.153Z","cwes":["CWE-408"],"updated_at":"2026-11-02T14:34:32.495407Z"}],"euvd":[{"id":"EUVD-2022-6404","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.","status":"published","published":"2022-07-29T13:20:10Z","modified":"2024-08-03T00:39:08Z","updated_at":"2026-11-03T03:25:57.932023Z"}],"ghsa":[{"id":"GHSA-qq3j-44gw-cf6r","title":"Eclipse Californium denial of service (DoS) via Datagram Transport Layer Security (DTLS) handshake on parameter mismatch","description":"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 DTLS_VERIFY_PEERS_ON_RESUMPTION_THRESHOLD values larger than 0.","status":"published","published":"2022-07-30T00:00:35Z","modified":"2023-04-19T13:17:47Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-408"],"updated_at":"2026-11-02T14:36:51.39133Z"}],"nvd":[{"id":"CVE-2022-2576","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.","status":"published","published":"2022-07-29T14:15:08.177Z","modified":"2026-06-17T04:42:08.76Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-408"],"updated_at":"2026-11-02T14:07:24.037422Z"}],"osv":[{"id":"GHSA-qq3j-44gw-cf6r","title":"Eclipse Californium denial of service (DoS) via Datagram Transport Layer Security (DTLS) handshake on parameter mismatch","description":"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 DTLS_VERIFY_PEERS_ON_RESUMPTION_THRESHOLD values larger than 0.","status":"published","published":"2022-07-30T00:00:35Z","modified":"2023-11-08T04:08:47.900072Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-408"],"updated_at":"2026-11-02T15:46:54.760124Z"},{"id":"CVE-2022-2576","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.","status":"published","published":"2022-07-29T13:20:10Z","modified":"2026-10-28T02:30:39.666075296Z","cwes":["CWE-408"],"updated_at":"2026-11-02T15:44:24.758293Z"}]}}