Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 56.9%
CVSS Severity
CVSS v3 Score 9.1
References
Products affected by CVE-2021-42143
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cpe:2.3:a:contiki-ng:tinydtls:-
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cpe:2.3:a:contiki-ng:tinydtls:2018-08-30