CVE-2021-42141

CRITICAL EPSS 63.8%
Published Jan 22, 20242y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Jan 22, 2024 2y ago
Last Modified Jun 17, 2026 2w ago

Description

An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with different epoch numbers in the packets Client_Hello, Client_key_exchange, and Change_cipher_spec, which may cause denial of service.

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
63.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-755

Affected Products 1

VendorProductVersionRange
contiki-ngtinydtls* ≤2018-08-30

References 4

  • packetstormsecurity.com http://packetstormsecurity.com/files/176625/Contiki-NG-tinyDTLS-Denial-Of-Service.html
    Third Party AdvisoryVDB Entry
  • seclists.org http://seclists.org/fulldisclosure/2024/Jan/14
  • github.com https://github.com/contiki-ng/tinydtls/issues/27
    Patch
  • seclists.org https://seclists.org/fulldisclosure/2024/Jan/14
    Mailing ListThird Party Advisory

Remediation

  • github.com https://github.com/contiki-ng/tinydtls/issues/27
    Patch