What’s Vulnerable › Vulnerabilities

CVE-2021-42146

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-24 · updated 2026-06-17
• Weakness: CWE-755

Description

An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. DTLS servers allow remote attackers to reuse the same epoch number within two times the TCP maximum segment lifetime, which is prohibited in RFC6347. This vulnerability allows remote attackers to obtain sensitive application (data of connected clients).

Affected products

• contiki-ng Tinydtls: 2018-08-30

References

• https://seclists.org/fulldisclosure/2024/Jan/19
• http://seclists.org/fulldisclosure/2024/Jan/19
• https://seclists.org/fulldisclosure/2024/Jan/19

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