Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bounds read can be caused by an incoming DIO message when using the RPL-Lite implementation in the Contiki-NG operating system. More specifically, the prefix information of the DIO message contains a field that specifies the length of an IPv6 address prefix. The value of this field is not validated, which means that an attacker can set a value that is longer than the maximum prefix length. Subsequently, a memcmp function call that compares different prefixes can be called with a length argument that surpasses the boundary of the array allocated for the prefix, causing an out-of-bounds read. The problem has been patched in the "develop" branch of Contiki-NG, and is expected to be included in the next release. Users are advised to update as soon as they are able to or to manually apply the changes in Contiki-NG pull request #2721.

GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

GitHub, Inc. CWE-125

GitHub, Inc. https://github.com/contiki-ng/contiki-ng/pull/2721 [No types assigned]

GitHub, Inc. https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-jp4p-fq85-jch2 [No types assigned]