{"id":"CVE-2021-34433","state":"PUBLISHED","title":"In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side","description":"In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange.","publishedAt":"2021-08-20T17:10:10.000Z","updatedAt":"2024-08-04T00:12:50.235Z","severity":null,"assigner":"eclipse","products":["The Eclipse Foundation Eclipse Californium"],"affected":[{"vendor":"The Eclipse Foundation","product":"Eclipse Californium","versions":[{"version":"2.0.0","status":"affected","lessThan":"unspecified","versionType":"custom"},{"version":"unspecified","status":"affected","lessThanOrEqual":"2.6.4","versionType":"custom"},{"version":"3.0.0-M1","status":"affected","lessThan":"unspecified","versionType":"custom"},{"version":"unspecified","status":"affected","lessThanOrEqual":"3.0.0-M3","versionType":"custom"}]}],"references":["https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281"],"weaknesses":["CWE-322"],"ingestedAt":"2026-10-29T19:48:38.863Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/34xxx/CVE-2021-34433.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-34433","state":"PUBLISHED","datePublished":"2021-08-20T17:10:10.000Z","dateUpdated":"2024-08-04T00:12:50.235Z","assignerShortName":"eclipse","assignerOrgId":"e51fbebd-6053-4e49-959f-1b94eeb69a2c","dateReserved":"2021-06-09T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange."}],"affected":[{"vendor":"The Eclipse Foundation","product":"Eclipse Californium","versions":[{"version":"2.0.0","status":"affected","lessThan":"unspecified","versionType":"custom"},{"version":"unspecified","status":"affected","lessThanOrEqual":"2.6.4","versionType":"custom"},{"version":"3.0.0-M1","status":"affected","lessThan":"unspecified","versionType":"custom"},{"version":"unspecified","status":"affected","lessThanOrEqual":"3.0.0-M3","versionType":"custom"}]}],"references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281","tags":["x_refsource_CONFIRM"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-322","description":"CWE-322: Key Exchange without Entity Authentication","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"eclipse","dateUpdated":"2021-08-20T17:10:10.000Z","orgId":"e51fbebd-6053-4e49-959f-1b94eeb69a2c"},"x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"security@eclipse.org","ID":"CVE-2021-34433","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Eclipse Californium","version":{"version_data":[{"version_affected":">=","version_value":"2.0.0"},{"version_affected":"<=","version_value":"2.6.4"},{"version_affected":">=","version_value":"3.0.0-M1"},{"version_affected":"<=","version_value":"3.0.0-M3"}]}}]},"vendor_name":"The Eclipse Foundation"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"In Eclipse Californium version 2.0.0 to 2.6.4 and 3.0.0-M1 to 3.0.0-M3, the certificate based (x509 and RPK) DTLS handshakes accidentally succeeds without verifying the server side's signature on the client side, if that signature is not included in the server's ServerKeyExchange."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-322: Key Exchange without Entity Authentication"}]}]},"references":{"reference_data":[{"name":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281","refsource":"CONFIRM","url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281"}]}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T00:12:50.235Z"}}]}}}