// For flags

CVE-2021-38540

Apache Airflow: Variable Import endpoint missed authentication check

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The variable import endpoint was not protected by authentication in Airflow >=2.0.0, <2.1.3. This allowed unauthenticated users to hit that endpoint to add/modify Airflow variables used in DAGs, potentially resulting in a denial of service, information disclosure or remote code execution. This issue affects Apache Airflow >=2.0.0, <2.1.3.

El endpoint de importación de variables no estaba protegido por autenticación en Airflow versiones posteriores a 2.0.0 incluyéndola, versiones anteriores a 2.1.3. Esto permitía a usuarios no autenticados acceder a ese endpoint para añadir y modificar las variables de Airflow usadas en los DAG, resultando en una denegación de servicio, una divulgación de información o una ejecución de código remota. Este problema afecta a Apache Airflow versiones posteriores a 2.0.0 incluyéndola, versiones anteriores a 2.1.3

*Credits: Apache Airflow would like to thank Nathan Jones, National Australia Bank’s Offensive Security Team
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:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-08-11 CVE Reserved
  • 2021-09-09 CVE Published
  • 2022-06-13 First Exploit
  • 2024-08-04 CVE Updated
  • 2024-08-28 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-269: Improper Privilege Management
  • CWE-306: Missing Authentication for Critical Function
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"
 >= 2.0.0 < 2.1.3
Search vendor "Apache" for product "Airflow" and version " >= 2.0.0 < 2.1.3"
-
Affected