vm2 Sandbox Escape vulnerability

A sandbox escape vulnerability exists in vm2 for versions up to 3.9.17. It abuses an unexpected creation of a host object based on the specification of Proxy.

Impact

A threat actor can bypass the sandbox protections to gain remote code execution rights on the host running the sandbox.

Patches

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

Workarounds

None.

References

PoC - https://gist.github.com/arkark/e9f5cf5782dec8321095be3e52acf5ac

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.