// For flags

CVE-2021-21413

Misuse of `Reference` and other transferable APIs may lead to access to nodejs isolate

Severity Score

9.6
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

isolated-vm is a library for nodejs which gives you access to v8's Isolate interface. Versions of isolated-vm before v4.0.0 have API pitfalls which may make it easy for implementers to expose supposed secure isolates to the permissions of the main nodejs isolate. Reference objects allow access to the underlying reference's full prototype chain. In an environment where the implementer has exposed a Reference instance to an attacker they would be able to use it to acquire a Reference to the nodejs context's Function object. Similar application-specific attacks could be possible by modifying the local prototype of other API objects. Access to NativeModule objects could allow an attacker to load and run native code from anywhere on the filesystem. If combined with, for example, a file upload API this would allow for arbitrary code execution. This is addressed in v4.0.0 through a series of related changes.

isolated-vm es una biblioteca para nodejs que le da acceso a la interfaz Isolate de v8. Las versiones de isolated-vm anteriores a v4.0.0 presentan unas limitaciones de la API que puede facilitar a implementadores una exposición de supuestos aislamientos seguros para los permisos del aislamiento de nodejs principal. Los objetos de referencia permiten el acceso a la cadena de prototipos completa de la referencia subyacente. En un entorno donde el implementador ha expuesto una instancia de Referencia a un atacante, podría ser capaz de usarla para adquirir una Referencia al objeto de Función del contexto de nodejs. Se podrían realizar ataques específicos de aplicaciones similares al modificar el prototipo local de otros objetos API. Un acceso a los objetos NativeModule podría permitir a un atacante cargar y ejecutar código nativo desde cualquier lugar del sistema de archivos. Si es combinado con, por ejemplo, una API de carga de archivos, esto permitiría una ejecución de código arbitrario. Esto es abordado en versión v4.0.0 mediante una serie de cambios relacionados.

*Credits: N/A
CVSS Scores
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Adjacent
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-22 CVE Reserved
  • 2021-03-30 CVE Published
  • 2024-03-05 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-913: Improper Control of Dynamically-Managed Code Resources
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Isolated-vm Project
Search vendor "Isolated-vm Project"
 Isolated-vm
Search vendor "Isolated-vm Project" for product "Isolated-vm"
 < 4.0.0
Search vendor "Isolated-vm Project" for product "Isolated-vm" and version " < 4.0.0"
node.js
Affected