vm2 Sandbox Escape vulnerability

There exists a vulnerability in exception sanitization of vm2 for versions up to 3.9.16, allowing attackers to raise an unsanitized host exception inside handleException() which can be used to escape the sandbox and run arbitrary code in host context.

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 3.9.17 of vm2.

Workarounds

None.

References

PoC - https://gist.github.com/leesh3288/381b230b04936dd4d74aaf90cc8bb244

For more information

If you have any questions or comments about this advisory:

• Open an issue in VM2

Thanks to Xion (SeungHyun Lee) of KAIST Hacking Lab for disclosing this vulnerability.