CVE-2021-32771 Information

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.

Reference

https://github.com/contiki-ng/contiki-ng/pull/1615/commits/587ae59956e00316fd44fd7072ac3a6a07b4b20f https://github.com/contiki-ng/contiki-ng/pull/1615 https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-jqjf-v7v9-xp6w https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8