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Sandbox Escape

Critical
patriksimek published GHSA-whpj-8f3w-67p5 May 15, 2023

Package

npm vm2 (npm)

Affected versions

<= 3.9.17

Patched versions

3.9.18

Description

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.

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVE ID

CVE-2023-32314

Weaknesses

No CWEs

Credits