CVE-2021-42146 - Vulnerability Details - OpenCVE

Description

An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers allow remote attackers to reuse the same epoch number within two times the TCP maximum segment lifetime, which is prohibited in RFC6347. This vulnerability allows remote attackers to obtain sensitive application (data of connected clients).

Published: 2024-01-24

Score: 7.5 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:contiki-ng:tinydtls:2018-08-30:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00087.

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
http://seclists.org/fulldisclosure/2024/Jan/19
https://seclists.org/fulldisclosure/2024/Jan/19

History

Fri, 20 Jun 2025 20:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-303
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 22 Nov 2024 12:00:00 +0000

Type	Values Removed	Values Added
References		http://seclists.org/fulldisclosure/2024/Jan/19

Subscriptions

Contiki-ng Tinydtls

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2024-01-24T00:00:00.000Z

Updated: 2025-06-20T19:19:37.327Z

Reserved: 2021-10-11T00:00:00.000Z

Link: CVE-2021-42146

Vulnrichment

Updated: 2024-08-04T03:30:37.713Z

NVD

Status : Modified

Published: 2024-01-24T19:15:08.483

Modified: 2025-06-20T20:15:23.110

Link: CVE-2021-42146

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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