CVE-2020-13927: Apache Airflow's Experimental API Authentication Bypass
"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]authbackend = airflow.api.auth.backend.denyall 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"
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
pip/apache-airflowto a version that resolves this vulnerability.Fixed in 1.10.11 - Configuration
For existing Airflow 1.10.11 installations, update the config to set default authentication backend to deny all requests: [api]auth_backend = airflow.api.auth.backend.deny_all (the default changed for new installs).
Apache Airflow Experimental API [api]auth_backend = airflow.api.auth.backend.deny_all
Event History
Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID is CVE-2020-13927.
What is the title of this vulnerability?
The title of this vulnerability is 'Apache Airflow's Experimental API Authentication Bypass'.
What is the severity of CVE-2020-13927?
The severity of CVE-2020-13927 is critical with a score of 9.8.
What is the affected software?
The affected software is Apache Airflow's Experimental API version up to 1.10.11.
How can I fix this vulnerability?
To fix this vulnerability, update to Apache Airflow version 1.10.11 or higher.