VULNERABILITY INTELLIGENCE

CVE-2021-34433

CVSS score7.5 HIGH
EPSS probability0.34%
CISA KEVNot currently listed
Published2021-08-20
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • emo@eclipse.org: CWE-322
  • nvd@nist.gov: CWE-347

Primary references