VULNERABILITY INTELLIGENCE

CVE-2021-42142

CVSS score9.8 CRITICAL
EPSS probability0.99%
CISA KEVNot currently listed
Published2024-01-23
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-755
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-770

Primary references