CVE-2023-31129 Contiki-NG missing NULL pointer check in IPv6 neighbor discovery

The Contiki-NG operating system versions 4.8 and prior can be triggered to dereference a NULL pointer in the message handling code for IPv6 router solicitiations. Contiki-NG contains an implementation of IPv6 Neighbor Discovery ND in the module os/net/ipv6/uip-nd6.c. The ND protocol includes a...