CVE-2020-27222

HIGH

Eclipse Californium 2.3.0-2.6.0 - Denial of Service via DTLS Handshake State Mismatch

Title source: llm
STIX 2.1

Description

In Eclipse Californium version 2.3.0 to 2.6.0, the certificate based (x509 and RPK) DTLS handshakes accidentally fails, because the DTLS server side sticks to a wrong internal state. That wrong internal state is set by a previous certificate based DTLS handshake failure with TLS parameter mismatch. The DTLS server side must be restarted to recover this. This allow clients to force a DoS.

References (1)

Core 1
Core References
Permissions Required, Vendor Advisory x_refsource_confirm
https://bugs.eclipse.org/bugs/show_bug.cgi?id=570844

Scores

CVSS v3 7.5
EPSS 0.0023
EPSS Percentile 45.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-372
Status published
Products (1)
eclipse/californium 2.3.0 - 2.6.0
Published Feb 03, 2021
Tracked Since Feb 18, 2026