Denial of Service Vulnerability in Contiki-NG tinyDTLS
CVE-2021-42141

9.8CRITICAL

Key Information:

Vendor

Contiki-ng

Status
Tinydtls
Vendor
CVE Published:
22 January 2024

What is CVE-2021-42141?

A vulnerability exists in the tinyDTLS implementation within the Contiki-NG framework, which stems from improper handling of handshake sequences. This flaw occurs when a handshake completes with mismatched epoch numbers across multiple packets, specifically during the Client_Hello, Client_key_exchange, and Change_cipher_spec exchanges. As a result, this inconsistency can lead to a denial of service, making the affected system unresponsive or inaccessible.

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References

https://github.com/contiki-ng/tinydtls/issues/27
http://packetstormsecurity.com/files/176625/Contiki-NG-ti...
https://seclists.org/fulldisclosure/2024/Jan/14

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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