// For flags

CVE-2020-13927

Apache Airflow's Experimental API Authentication Bypass

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

3
*Multiple Sources

Exploited in Wild

Yes
*KEV

Decision

Act
*SSVC
Descriptions

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Note this change fixes it for new installs but existing users need to change their config to default `[api]auth_backend = airflow.api.auth.backend.deny_all` as mentioned in the Updating Guide: https://github.com/apache/airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-default

La configuración predeterminada previa para Airflow's Experimental API permitió todas las peticiones de la API sin autenticación, pero esto plantea riesgos de seguridad para los usuarios que no se dan cuenta de este hecho. Desde Airflow versión 1.10.11, el valor predeterminado ha sido cambiado para denegar todas las peticiones por defecto y está documentado en https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Tome en cuenta que este cambio lo corrige para nuevas instalaciones, pero los usuarios existentes deben cambiar su configuración a la predeterminada "[api] auth_backend=airflow.api.auth.backend.deny_all" como es mencionado en la Guía de Actualización: https://github.com/apache /airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-defaul

Apache Airflow versions 1.10.10 and below suffer from a remote code execution vulnerability.

The previous default setting for Airflow's Experimental API was to allow all API requests without authentication.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Act
Exploitation
Active
Automatable
Yes
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2020-06-08 CVE Reserved
  • 2020-11-10 CVE Published
  • 2021-06-02 First Exploit
  • 2022-01-18 Exploited in Wild
  • 2022-07-18 KEV Due Date
  • 2024-07-28 EPSS Updated
  • 2024-08-04 CVE Updated
CWE
  • CWE-306: Missing Authentication for Critical Function
  • CWE-1056: Invokable Control Element with Variadic Parameters
  • CWE-1188: Initialization of a Resource with an Insecure Default
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
 Airflow
Search vendor "Apache" for product "Airflow"
 < 1.10.11
Search vendor "Apache" for product "Airflow" and version " < 1.10.11"
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Affected