There exists a vulnerability in source code transformer (exception sanitization logic) of vm2 for versions up to 3.9.15, allowing attackers to bypass handleException() and leak unsanitized host exceptions 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 3.9.16 of vm2.

Workarounds

None.

References

Github Issue - patriksimek/vm2#516
PoC - https://gist.github.com/leesh3288/f05730165799bf56d70391f3d9ea187c

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.

References

• GHSA-xj72-wvfv-8985
• patriksimek/vm2#516
• patriksimek/vm2@24c724d
• https://gist.github.com/leesh3288/f05730165799bf56d70391f3d9ea187c
• https://github.com/patriksimek/vm2/releases/tag/3.9.16
• https://nvd.nist.gov/vuln/detail/CVE-2023-29199