CVE-2021-42147
9.1 · CRITICALOverview
CVE-2021-42147 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
Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet.
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
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Frequently Asked Questions
What is CVE-2021-42147?
CVE-2021-42147 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-2021-42147?
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-2021-42147?
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-2021-42147?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-42147 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.
Automated penetration testing that runs continuously, not just quarterly.
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Browser-based exploitation validates findings with real proof-of-concept.
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