CVE-2021-42142

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.

Categories

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 1.05% Top 25%
Third-Party Advisory seclists.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/contiki-ng/tinydtls/issues/24 patch issue tracking
https://seclists.org/fulldisclosure/2024/Jan/15 third party advisory mailing list
http://seclists.org/fulldisclosure/2024/Jan/15

Frequently Asked Questions

What is the severity of CVE-2021-42142?
CVE-2021-42142 has been scored as a critical severity vulnerability.
How to fix CVE-2021-42142?
To fix CVE-2021-42142, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42142 being actively exploited in the wild?
It is possible that CVE-2021-42142 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.