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CRITICAL · 9.8

CVE-2021-42142

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...

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
Contiki-NgTinydtls<= 2018-08-30

Related Weaknesses (CWE)

CWE-770CWE-755

References

FAQ

What is CVE-2021-42142?

CVE-2021-42142 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...

How severe is CVE-2021-42142?

CVE-2021-42142 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-42142?

Check the references section above for vendor advisories and patch information. Affected products include: Contiki-Ng Tinydtls.