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CVE-2021-42142

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Date: January 22, 2024

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.

Language: C

Severity Score

Related Resources (5)

https://github.com/contiki-ng/tinydtls/issues/24
https://seclists.org/fulldisclosure/2024/Jan/15
https://nvd.nist.gov/vuln/detail/CVE-2021-42142
http://seclists.org/fulldisclosure/2024/Jan/15
https://www.mend.io/vulnerability-database/CVE-2021-42142

Severity Score

Weakness Type (CWE)

Allocation of Resources Without Limits or Throttling

CWE-770

Improper Handling of Exceptional Conditions

CWE-755

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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