CVE-2021-42142

critical

Description

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.

References

https://seclists.org/fulldisclosure/2024/Jan/15

https://github.com/contiki-ng/tinydtls/issues/24

http://seclists.org/fulldisclosure/2024/Jan/15

Details

Source: Mitre, NVD

Published: 2024-01-23

Updated: 2025-06-11

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H