CVE-2021-32771

Buffer overflow in contiki-ng

Description

Contiki-NG is an open-source, cross-platform operating system for IoT devices. In affected versions it is possible to cause a buffer overflow when copying an IPv6 address prefix in the RPL-Classic implementation in Contiki-NG. In order to trigger the vulnerability, the Contiki-NG system must have joined an RPL DODAG. After that, an attacker can send a DAO packet with a Target option that contains a prefix length larger than 128 bits. The problem was fixed after the release of Contiki-NG 4.7. Users unable to upgrade may apply the patch in Contiki-NG PR #1615.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.10%
Third-Party Advisory github.com Third-Party Advisory github.com 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-jqjf-v7v9-xp6w third party advisory
https://github.com/contiki-ng/contiki-ng/pull/1615 third party advisory patch
https://github.com/contiki-ng/contiki-ng/pull/1615/commits/587ae59956e00316fd44fd7072ac3a6a07b4b20f third party advisory patch
https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-32771?
CVE-2021-32771 has been scored as a high severity vulnerability.
How to fix CVE-2021-32771?
To fix CVE-2021-32771, 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-2021-32771 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32771 is being actively exploited. 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-2021-32771?
CVE-2021-32771 affects contiki-ng contiki-ng.
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