CVE-2021-21279 Infinite loop in IPv6 neighbor solicitation processing
An attacker can cause a denial of service in Contiki-NG IoT devices by triggering an infinite loop during IPv6 neighbor solicitation processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21279?
CVE-2021-21279 is a high-severity denial of service vulnerability in contiki-ng, published on 18 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-835
Which versions are affected by CVE-2021-21279?
It affects 1 product.
Products include Contiki-Ng Contiki-Ng.
How do I fix CVE-2021-21279?
No fix has been published for CVE-2021-21279 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-21279 being exploited?
There is no known exploitation of CVE-2021-21279 in the wild and no public exploit code.