CVE-2021-34433

—

CVSS 3.1

7.5 high

EPSS

<1%p27

Published

Aug 20, 2021 (Aug 20, 2021)

Modified

Jun 17, 2026

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.

Vendors: eclipse
Products: californium
Weakness: CWE-322, CWE-347
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (0.3%)

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