CVE-2021-42143
Last modified
CVE-2021-42143 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 0.81% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Contiki-Ng | Tinydtls | <= 2018-08-30 |
References
- https://seclists.org/fulldisclosure/2024/Jan/16Mailing List, Third Party Advisory
- https://seclists.org/fulldisclosure/2024/Jan/16Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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