CVE-2021-42143
First published: Wed Jan 24 2024(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Contiki-NG | <=2018-08-30 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-42143?
CVE-2021-42143 has been categorized as a denial of service vulnerability.
How do I fix CVE-2021-42143?
To fix CVE-2021-42143, you should update to the latest version of Contiki-NG tinyDTLS that resolves the infinite loop issue.
What types of attacks can exploit CVE-2021-42143?
CVE-2021-42143 can be exploited by attackers sending a malformed ClientHello handshake message.
What software is affected by CVE-2021-42143?
CVE-2021-42143 affects Contiki-NG tinyDTLS versions up to and including 2018-08-30.
Is CVE-2021-42143 a local or remote vulnerability?
CVE-2021-42143 is a remote vulnerability, as it can be exploited over the network.
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