CVE-2021-34433 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://bugs.eclipse.org/bugs/show_bug.cgi?id=575281

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5