Vulnerability Monitor

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CVE-2021-42142

An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers mishandle the early use of a large epoch number. This vulnerability allows remote attackers to cause a denial of service and false-positive packet drops.

Published

2024-01-23T22:15:16.270

Last Modified

2025-06-11T17:15:30.070

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

Weaknesses

Type: Primary
CWE-755
Type: Secondary
CWE-770

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	contiki-ng	tinydtls	≤ 2018-08-30	Yes

References

https://github.com/contiki-ng/tinydtls/issues/24 Issue Tracking, Patch ([email protected])
https://seclists.org/fulldisclosure/2024/Jan/15 Mailing List, Third Party Advisory ([email protected])
http://seclists.org/fulldisclosure/2024/Jan/15 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/contiki-ng/tinydtls/issues/24 Issue Tracking, Patch (af854a3a-2127-422b-91ae-364da2661108)
https://seclists.org/fulldisclosure/2024/Jan/15 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)