Contiki-NG up to 4.9 rpl_ext_header_hbh_update type conversion

Summaryinfo

A vulnerability described as critical has been identified in Contiki-NG up to 4.9. The affected element is the function rpl_ext_header_hbh_update. Executing a manipulation can lead to type conversion. This vulnerability is registered as CVE-2024-47181. It is possible to launch the attack remotely. No exploit is available. 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 declared as critical. This vulnerability affects the function rpl_ext_header_hbh_update. The manipulation with an unknown input leads to a type conversion vulnerability. The CWE definition for the vulnerability is CWE-704. The product does not correctly convert an object, resource, or structure from one type to a different type. As an impact it is known to affect availability. CVE summarizes:

Contiki-NG is an open-source, cross-platform operating system for IoT devices. An unaligned memory access can be triggered in the two RPL implementations of the Contiki-NG operating system. The problem can occur when either one of these RPL implementations is enabled and connected to an RPL instance. If an IPv6 packet containing an odd number of padded bytes before the RPL option, it can cause the rpl_ext_header_hbh_update function to read a 16-bit integer from an odd address. The impact of this unaligned read is architecture-dependent, but can potentially cause the system to crash. The problem has not been patched as of release 4.9, but will be included in the next release. One can apply the changes in Contiki-NG pull request #2962 to patch the system or wait for the next release.

The advisory is available at github.com. This vulnerability was named CVE-2024-47181 since 09/20/2024. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

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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