CVE-2021-42142

CRITICAL EPSS 58.1%
Published Jan 23, 20242y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Jan 23, 2024 2y ago
Last Modified Jun 17, 2026 2w ago

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 Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
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

Threat Intelligence

EPSS Exploit Probability
58.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-755
CWE-770

Affected Products 1

VendorProductVersionRange
contiki-ngtinydtls* ≤2018-08-30

References 3

  • seclists.org http://seclists.org/fulldisclosure/2024/Jan/15
  • github.com https://github.com/contiki-ng/tinydtls/issues/24
    Issue TrackingPatch
  • seclists.org https://seclists.org/fulldisclosure/2024/Jan/15
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/contiki-ng/tinydtls/issues/24
    Issue TrackingPatch