GHSA-28q4-xrqh-9479
Duplicate Advisory: vm2: NodeVM node:-prefixed negative builtin deny bypass exposes child_process
- Severity
- 0.0 / 10
- Critical · CVSS 4.0
- Exploit chance (EPSS)
- —
- No score published
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-269 Improper Privilege Management
- Fix
- None yet
- No fixed version published
Description
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-8686-vhfx-7r3j. This link is maintained to preserve external references.
Original Description
vm2 through 3.11.6 does not normalize node:-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require policy. Although NodeVM strips the node: prefix during require() resolution, negative wildcard entries are matched by exact string comparison against the canonical builtin names, so a policy such as new NodeVM({ require: { builtin: ['*', '-node:child_process'] } }) fails to deny the canonical child_process module. Sandboxed code can therefore obtain the host child_process builtin via require('child_process') or require('node:child_process'), gaining references to process-spawning APIs such as execSync and spawn, which is equivalent to host command-execution capability for untrusted sandbox code. Fixed in vm2 3.11.7. (Suggested title: "vm2 before 3.11.7: NodeVM builtin deny-list bypass via node:-prefixed specifiers exposes child_process")
Affected versions
npm
| Package | Vulnerable | Fixed in |
|---|---|---|
| vm2 | <= 3.11.6 |
No fix yet |
How to fix
No fixed version has been published yet. Until one is, remove or replace the package, or turn off or isolate the affected feature. This page updates when a fix ships.
Severity breakdown
CVSS 4.0 0.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Attack vector
- Network
- Attack complexity
- Low
- Attack requirements
- None
- Privileges required
- Low
- User interaction
- None
- Confidentiality (vulnerable system)
- High
- Integrity (vulnerable system)
- High
- Availability (vulnerable system)
- High
- Confidentiality (subsequent systems)
- High
- Integrity (subsequent systems)
- High
- Availability (subsequent systems)
- High
- Exploit maturity
- Not defined
- Scope
- X
CVSS 3.1 9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Weakness
CWE-269: Improper Privilege Management
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
How to prevent it
- Architecture and Design, Operation: Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Architecture and Design: Follow the principle of least privilege when assigning access rights to entities in a software system.
- Architecture and Design: Consider following the principle of separation of privilege. Require multiple conditions to be met before permitting access to a system resource.
References
Advisories
Other links
Timeline
- Published
- Withdrawn
- Last updated by the source
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-489w-w794-jq94 vm2: NodeVM zlib Buffers expose pooled host memory across the VM boundary | High | Also affects vm2 |
| GHSA-2v2p-6j97-cjg9 vm2: Host Promise rejection from an exposed constructor can terminate the vm2 host process | Medium | Also affects vm2 |
| GHSA-5h3f-q97h-ccvc vm2: NodeVM custom resolution bypasses external path boundaries | Critical | Also affects vm2 |
| GHSA-pq68-rvw4-xp4r vm2 contains a sandbox escape vulnerability | Critical | Also affects vm2 |
| GHSA-f8gf-w286-fmq2 vm2: `allowAsync: false` can be bypassed through Promise thenable assimilation in VM and NodeVM | High | Also affects vm2 |
| GHSA-6rh5-qq4q-97xh vm2: NodeVM builtin denylist bypass via fs/promises despite -fs, allowing host filesystem writes | High | Also affects vm2 |
| GHSA-8686-vhfx-7r3j vm2: NodeVM node:-prefixed negative builtin deny bypass exposes child_process | Critical | Also affects vm2 |
| GHSA-wjwh-qqvp-g4p4 vm2 sandbox escape via WebAssembly.compileStreaming Promise species bypass | Critical | Also affects vm2 |
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