CVE-2021-42143
9.1 · CRITICALOverview
CVE-2021-42143 is a critical-severity vulnerability affecting contiki-ng tinydtls. It was published on January 24, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from contiki-ng. Update tinydtls to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| contiki-ng | tinydtls | 0 | Affected |
Frequently Asked Questions
What is CVE-2021-42143?
CVE-2021-42143 is a critical-severity vulnerability affecting contiki-ng tinydtls. It was published on January 24, 2024 and has a CVSS 3.1 base score of 9.1 (CRITICAL).
How severe is CVE-2021-42143?
This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2021-42143?
Check the references section for vendor advisories and patches from contiki-ng. Update tinydtls to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-42143?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-42143 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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