CVE-2021-42147 - Vulnerability Details - OpenCVE

Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00354.

Exploitation none

Automatable yes

Technical Impact partial

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.

Project Subscriptions

Vendors	Products
Contiki-ng Subscribe	Tinydtls Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
http://seclists.org/fulldisclosure/2024/Jan/20
https://seclists.org/fulldisclosure/2024/Jan/20

History

Fri, 30 May 2025 15:15:00 +0000

Type	Values Removed	Values Added
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/20

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: mitre

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

Updated: 2025-05-30T14:17:01.233Z

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

Link: CVE-2021-42147

Vulnrichment

Updated: 2024-08-04T03:30:37.523Z

NVD

Status : Modified

Published: 2024-01-24T19:15:08.530

Modified: 2025-05-30T15:15:21.493

Link: CVE-2021-42147

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-125

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