Contiki-NG up to 4.7 IPv6 Neighbor Discovery os/net/ipv6/uip-nd6.c uip_buf out-of-bounds

Summaryinfo

A vulnerability categorized as problematic has been discovered in Contiki-NG up to 4.7. This impacts the function uip_buf of the file os/net/ipv6/uip-nd6.c of the component IPv6 Neighbor Discovery. Executing a manipulation can lead to out-of-bounds. The identification of this vulnerability is CVE-2022-35926. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Contiki-NG up to 4.7 and classified as problematic. This vulnerability affects the function uip_buf of the file os/net/ipv6/uip-nd6.c of the component IPv6 Neighbor Discovery. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. CVE summarizes:

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, <code>uip_buf</code>, 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.

The weakness was shared 08/05/2022 as GHSA-4hpq-4f53-w386. The advisory is available at github.com. This vulnerability was named CVE-2022-35926 since 07/15/2022. Technical details are known, but there is no available exploit.

Upgrading to version 4.8 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• Contiki-NG

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7

License

• open-source

Website

• Product: https://github.com/contiki-ng/contiki-ng/

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