This page lists publicly disclosed CVE vulnerabilities affecting contiki-ng tinydtls (linked via NVD CPE). Each row includes severity scores, summaries, and publication dates to help identify and analyze security issues.
| CVE | Summary | Source | Max CVSS | EPSS % | Published | Updated |
|---|---|---|---|---|---|---|
| CVE-2021-42147 | Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet. | [email protected] | 9.1 | 0.84% | 2024-01-24 | 2026-06-17 |
| CVE-2021-42146 | 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). | [email protected] | 7.5 | 0.66% | 2024-01-24 | 2026-06-17 |
| CVE-2021-42145 | An assertion failure discovered in in check_certificate_request() in Contiki-NG tinyDTLS through master branch 53a0d97 allows attackers to cause a denial of service. | [email protected] | 7.5 | 0.43% | 2024-01-24 | 2026-06-17 |
| CVE-2021-42143 | An issue was discovered in Contiki-NG tinyDTLS through master branch 53a0d97. An infinite loop bug exists during the handling of a ClientHello handshake message. This bug allows remote attackers to cause a denial of service by sending a malformed ClientHello handshake message with an odd length of cipher suites, which triggers an infinite loop (consuming all resources) and a buffer over-read that can disclose sensitive information. | [email protected] | 9.1 | 0.81% | 2024-01-24 | 2026-06-17 |
| CVE-2021-42142 | 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. | [email protected] | 9.8 | 0.99% | 2024-01-23 | 2026-06-17 |
| CVE-2021-42141 | 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. | [email protected] | 9.8 | 1.18% | 2024-01-22 | 2026-06-17 |