CVE-2021-42141

CRITICAL

Contiki-ng Tinydtls < 2018-08-30 - Improper Exception Handling

Title source: rule

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 (4)

[Third Party Advisory, VDB Entry] http://packetstormsecurity.com/files/176625/Contiki-NG-tinyDTLS-Denial-Of-Service.html

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

[Mailing List, Third Party Advisory] https://seclists.org/fulldisclosure/2024/Jan/14

[Mailing List] http://seclists.org/fulldisclosure/2024/Jan/14

Scores

CVSS v3 9.8

EPSS 0.0012

EPSS Percentile 30.6%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-755

Status published

Products (1)

contiki-ng/tinydtls < 2018-08-30

Published Jan 22, 2024

Tracked Since Feb 18, 2026