What’s Vulnerable › Vulnerabilities

CVE-2021-42142

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-23 · updated 2026-06-17
• Weakness: CWE-755

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.

Affected products

• contiki-ng Tinydtls: through 2018-08-30

References

• https://github.com/contiki-ng/tinydtls/issues/24
• https://seclists.org/fulldisclosure/2024/Jan/15
• http://seclists.org/fulldisclosure/2024/Jan/15
• https://github.com/contiki-ng/tinydtls/issues/24
• https://seclists.org/fulldisclosure/2024/Jan/15

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