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Advisories

vm2 3.9.6 before 3.11.7 Sandbox Bypass via Accessor Descriptor

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severity
medium
date
Affecting

  • vm2 >= 3.9.6, < 3.11.7

CWE
  • CWE-471 Modification of Assumed-Immutable Data (MAID)
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N
Credit
oran-s
Description
vm2 versions from 3.9.6 before 3.11.7 fail to properly restrict access to accessor properties on frozen objects, allowing sandboxed scripts to bypass vm.freeze() and vm.readonly() protections. Attackers can use Object.getOwnPropertyDescriptor() or __lookupSetter__() to extract and invoke host object setters directly, mutating properties the embedder explicitly marked read-only.

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