CVE-2023-31129
Vulnerability from cvelistv5
Published
2023-05-08 20:51
Modified
2025-01-29 14:30
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/contiki-ng/contiki-ng/pull/2271Product
security-advisories@github.comhttps://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-x29r-5qjg-75mqPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/contiki-ng/contiki-ng/pull/2271Product
af854a3a-2127-422b-91ae-364da2661108https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-x29r-5qjg-75mqPatch, Vendor Advisory
Impacted products
Vendor Product Version
contiki-ng contiki-ng Version: <= 4.8
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