Critical severity9.1NVD Advisory· Published Jan 24, 2024· Updated Jun 17, 2026
CVE-2021-42143
CVE-2021-42143
Description
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.
Affected products
3(expand)+ 2 more
- (no CPE)
- (no CPE)range: <=53a0d97
- cpe:2.3:a:contiki-ng:tinydtls:*:*:*:*:*:*:*:*range: <=2018-08-30
Patches
Vulnerability mechanics
References
2- seclists.org/fulldisclosure/2024/Jan/16nvdMailing ListThird Party Advisory
- seclists.org/fulldisclosure/2024/Jan/16nvd
News mentions
0No linked articles in our index yet.