VulnerabilityModified
CVE-2021-42142
This vulnerability allows remote attackers to cause a denial of service and false-positive packet drops.
CRITICAL 9.8EPSS 0.99%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.99%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.99% probability · 61th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-755, CWE-770
- Affected
- contiki-ng/tinydtls
- Source
- cve@mitre.org
References
- https://github.com/contiki-ng/tinydtls/issues/24Issue Tracking, Patch
- https://seclists.org/fulldisclosure/2024/Jan/15Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2024/Jan/15
- https://github.com/contiki-ng/tinydtls/issues/24Issue Tracking, Patch
- https://seclists.org/fulldisclosure/2024/Jan/15Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.