CVE-2021-21280

Public Exploit
Out-of-bounds write when processing 6LoWPAN extension headers

Description

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. It is possible to cause an out-of-bounds write in versions of Contiki-NG prior to 4.6 when transmitting a 6LoWPAN packet with a chain of extension headers. Unfortunately, the written header is not checked to be within the available space, thereby making it possible to write outside the buffer. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.41%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: contiki-ng contiki-ng
Published at:
Updated at:

References

Link Tags
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-r768-hrhf-v592 exploit third party advisory patch
https://github.com/contiki-ng/contiki-ng/pull/1409 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-21280?
CVE-2021-21280 has been scored as a high severity vulnerability.
How to fix CVE-2021-21280?
To fix CVE-2021-21280, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21280 being actively exploited in the wild?
It is possible that CVE-2021-21280 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21280?
CVE-2021-21280 affects contiki-ng contiki-ng.
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