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NVD Vulnerability Details :
CVE-2021-42146
Modified
More InfoOfficial Page
Source-cve@mitre.org
View Known Exploited Vulnerability (KEV) details
Published At-24 Jan, 2024 | 19:15
Updated At-20 Jun, 2025 | 20:15

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).

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Secondary3.17.5HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Primary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Type: Secondary
Version: 3.1
Base score: 7.5
Base severity: HIGH
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CPE Matches
contiki-ng
contiki-ng
>>tinydtls>>2018-08-30
cpe:2.3:a:contiki-ng:tinydtls:2018-08-30:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-755Primarynvd@nist.gov
CWE-303Secondary134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE ID: CWE-755
Type: Primary
Source: nvd@nist.gov
CWE ID: CWE-303
Type: Secondary
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://seclists.org/fulldisclosure/2024/Jan/19cve@mitre.org
Mailing List
Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jan/19af854a3a-2127-422b-91ae-364da2661108
N/A
https://seclists.org/fulldisclosure/2024/Jan/19af854a3a-2127-422b-91ae-364da2661108
Mailing List
Third Party Advisory
Hyperlink: https://seclists.org/fulldisclosure/2024/Jan/19
Source: cve@mitre.org
Resource:
Mailing List
Third Party Advisory
Hyperlink: http://seclists.org/fulldisclosure/2024/Jan/19
Source: af854a3a-2127-422b-91ae-364da2661108
Resource: N/A
Hyperlink: https://seclists.org/fulldisclosure/2024/Jan/19
Source: af854a3a-2127-422b-91ae-364da2661108
Resource:
Mailing List
Third Party Advisory
Change History
0Changes found
Details not found