Contiki-NG tinyDTLS Buffer Over-Read / Denial Of Service

[Suggested description]An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. 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.[VulnerabilityType Other]infinite loop[Vendor of Product]https://github.com/contiki-ng/tinydtls[Affected Product Code Base]contiki-ng tinydtls - master branch 53a0d97[Affected Component]the service of dtls servers[Attack Type]Remote[Impact Code execution]true[Impact Denial of Service]true[Reference]https://github.com/contiki-ng/tinydtls/issues/22[Discoverer]jerrytesting[CVE Reference]The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2021-42143 to this vulnerability.