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01 Record

CVE-2021-34433

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

UnratedPUBLISHEDCNA: eclipse
CNA base scoreUnratedNo CNA CVSS vector

02 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

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.33% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 27.0% of scored records. A rank, not a probability.
NVD base score
7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-08-20 17:10Z5 YR AGO
Last updated
2024-08-04 00:12Z2 YR AGO
Reserved
2021-06-09
Assigning CNA
eclipse
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-322Key Exchange without Entity AuthenticationBase
  • CWE-347Improper Verification of Cryptographic SignatureBase
Data version
5.1
Document digest
20a57bf4901be42a2b945938c5003616e6fd622f4b6322ad17fdbc5fa99ddf45

05 Affected products

VendorProductVersionsPlatforms
The Eclipse FoundationEclipse Californium2.0.0 to < unspecified, <= 2.6.4, 3.0.0-M1 to < unspecified, <= 3.0.0-M3—

06 References