CVE-2021-42141

critical

Description

An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with different epoch numbers in the packets Client_Hello, Client_key_exchange, and Change_cipher_spec, which may cause denial of service.

References

Advisories
More

https://seclists.org/fulldisclosure/2024/Jan/14

http://packetstormsecurity.com/files/176625/Contiki-NG-tinyDTLS-Denial-Of-Service.html

https://github.com/contiki-ng/tinydtls/issues/27

http://seclists.org/fulldisclosure/2024/Jan/14

Details

Source: Mitre, NVD

Published: 2024-01-22

Updated: 2025-06-20

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H