CVE-2022-35926 Information

Description

Contiki-NG is an open-source cross-platform operating system for IoT devices. Because of insufficient validation of IPv6 neighbor discovery options in Contiki-NG attackers can send neighbor solicitation packets that trigger an out-of-bounds read. The problem exists in the module os/net/ipv6/uip-nd6.c where memory read operations from the main packet buffer uip_buf are not checked if they go out of bounds. In particular this problem can occur when attempting to read the 2-byte option header and the Source Link-Layer Address Option (SLLAO). This attack requires ipv6 be enabled for the network. The problem has been patched in the develop branch of Contiki-NG. The upcoming 4.8 release of Contiki-NG will include the patch.Users unable to upgrade may apply the patch in Contiki-NG PR 1654.

Reference

https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-4hpq-4f53-w386 https://github.com/contiki-ng/contiki-ng/pull/1654/commits/a4597001d50a04f4b9c78f323ba731e2f979802c https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.8 https://github.com/contiki-ng/contiki-ng/pull/1654