CVE-2021-21279: Infinite loop in IPv6 neighbor solicitation processing
First published: Fri Jun 18 2021(Updated: )
Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In verions prior to 4.6, an attacker can perform a denial-of-service attack by triggering an infinite loop in the processing of IPv6 neighbor solicitation (NS) messages. This type of attack can effectively shut down the operation of the system because of the cooperative scheduling used for the main parts of Contiki-NG and its communication stack. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Contiki-ng Contiki-ng | <4.6 |
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Frequently Asked Questions
What is the vulnerability ID for this issue?
CVE-2021-21279
What is the severity of CVE-2021-21279?
The severity of CVE-2021-21279 is high with a CVSS score of 7.5.
What is Contiki-NG?
Contiki-NG is an open-source cross-platform operating system for internet of things devices.
How can an attacker exploit CVE-2021-21279?
An attacker can perform a denial-of-service attack by triggering an infinite loop in the processing of IPv6 neighbor solicitation (NS) messages.
How can I fix CVE-2021-21279?
Upgrade to Contiki-NG version 4.6 or above to fix CVE-2021-21279.
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