var-202305-0517
Vulnerability from variot
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 message type called Router Solicitation (RS), which is used to locate routers and update their address information via the SLLAO (Source Link-Layer Address Option). If the indicated source address changes, a given neighbor entry is set to the STALE state.
The message handler does not check for RS messages with an SLLAO that indicates a link-layer address change that a neighbor entry can actually be created for the indicated address. The resulting pointer is used without a check, leading to the dereference of a NULL pointer of type uip_ds6_nbr_t.
The problem has been patched in the develop branch of Contiki-NG, and will be included in the upcoming 4.9 release. As a workaround, users can apply Contiki-NG pull request #2271 to patch the problem directly. Contiki-NG for, NULL There is a vulnerability in pointer dereference.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. Contiki-NG is an open-source, cross-platform operating system for next-generation IoT (Internet of Things) devices
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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