CVE-2023-32313: Inspect method manipulation in vm2

In versions 3.9.17 and lower of vm2 it was possible to get a read-write reference to the node inspect method and edit options for console.log.

Impact A threat actor can edit options for console.log.

Patches This vulnerability was patched in the release of version 3.9.18 of vm2.

Workarounds After creating a vm make the inspect method readonly with vm.readonly(inspect).

References PoC - https://gist.github.com/arkark/c1c57eaf3e0a649af1a70c2b93b17550

For more information

If you have any questions or comments about this advisory:

- Open an issue in VM2

Thanks to @arkark (Takeshi Kaneko) of GMO Cybersecurity by Ierae, Inc. for disclosing this vulnerability.

vm2 is a sandbox that can run untrusted code with Node's built-in modules. In versions 3.9.17 and lower of vm2 it was possible to get a read-write reference to the node inspect method and edit options for console.log. As a result a threat actor can edit options for the console.log command. This vulnerability was patched in the release of version 3.9.18 of vm2. Users are advised to upgrade. Users unable to upgrade may make the inspect method readonly with vm.readonly(inspect) after creating a vm.