CVEvulnerability

CVE-2021-34433

7.5 HIGH Published 2021-08-20 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-08-20
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Weaknesses
CWE-322, CWE-347

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.

Affected configurations

• eclipse californium (>= 2.0.0 < 2.6.5) • eclipse californium 3.0.0

Related

Weakness · CWE (2)

  • CWE-322 Key Exchange without Entity Authentication weakness
  • CWE-347 Improper Verification of Cryptographic Signature weakness

References