GHSA-9538-79j2-h62h
Duplicate Advisory: `allowAsync: false` can be bypassed through Promise thenable assimilation in VM and NodeVM
- Severity
- 0.0 / 10
- High · CVSS 4.0
- Exploit chance (EPSS)
- —
- No score published
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-693 Protection Mechanism Failure
- Fix
- None yet
- No fixed version published
Description
Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-f8gf-w286-fmq2. This link is maintained to preserve external references.
Original Description
vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM. While localPromise.prototype.then is replaced with a handler that throws 'Async not available', the sandbox's Promise static methods (Promise.resolve, Promise.all, Promise.race, Promise.any, and Promise.allSettled) still assimilate attacker-supplied thenables: native promise resolution performs PromiseResolveThenableJob and invokes the sandboxed code's then method in a microtask without passing through the patched then, so the async restriction is never applied. As a result, sandboxed script can schedule work that runs after VM.run() or NodeVM.run() has returned and outside the configured timeout, continuing to execute after the host believes execution is complete.
Affected versions
npm
| Package | Vulnerable | Fixed in |
|---|---|---|
| vm2 | <= 3.11.7 |
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:N/VI:L/VA:H/SC:N/SI:N/SA:N/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)
- None
- Integrity (vulnerable system)
- Low
- Availability (vulnerable system)
- High
- Confidentiality (subsequent systems)
- None
- Integrity (subsequent systems)
- None
- Availability (subsequent systems)
- None
- Exploit maturity
- Not defined
- Scope
- X
CVSS 3.1 7.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
Weakness
CWE-693: Protection Mechanism Failure
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
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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