Contiki-NG up to 4.9 RPL Protocol os/net/ipv6/tcpip.c tcpip_ipv6_output recursion

Summaryinfo

A vulnerability was found in Contiki-NG up to 4.9. It has been declared as critical. This vulnerability affects the function tcpip_ipv6_output of the file os/net/ipv6/tcpip.c of the component RPL Protocol Handler. The manipulation results in recursion. This vulnerability was named CVE-2023-29001. The attack may be performed from remote. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Contiki-NG up to 4.9. It has been classified as critical. Affected is the function tcpip_ipv6_output of the file os/net/ipv6/tcpip.c of the component RPL Protocol Handler. The manipulation with an unknown input leads to a recursion vulnerability. CWE is classifying the issue as CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. This is going to have an impact on availability. CVE summarizes:

Contiki-NG is an open-source, cross-platform operating system for IoT devices. The Contiki-NG operating system processes source routing headers (SRH) in its two alternative RPL protocol implementations. The IPv6 implementation uses the results of this processing to determine whether an incoming packet should be forwarded to another host. Because of missing validation of the resulting next-hop address, an uncontrolled recursion may occur in the tcpip_ipv6_output function in the os/net/ipv6/tcpip.c module when receiving a packet with a next-hop address that is a local address. Attackers that have the possibility to send IPv6 packets to the Contiki-NG host can therefore trigger deeply nested recursive calls, which can cause a stack overflow. The vulnerability has not been patched in the current release of Contiki-NG, but is expected to be patched in the next release. The problem can be fixed by applying the patch in Contiki-NG pull request #2264. Users are advised to either apply the patch manually or to wait for the next release. There are no known workarounds for this vulnerability.

The advisory is available at github.com. This vulnerability is traded as CVE-2023-29001 since 03/29/2023. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

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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
• 4.8
• 4.9

License

• open-source

Website

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

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