CVE-2020-13927 is a vulnerability in Apache AirFlow
Published on November 10, 2020
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
Known Exploited Vulnerability
This Apache Airflow's Experimental API Authentication Bypass vulnerability is part of CISA's list of Known Exploited Vulnerabilities. The previous default setting for Airflow's Experimental API was to allow all API requests without authentication.
The following remediation steps are recommended / required by July 18, 2022: Apply updates per vendor instructions.
Vulnerability Analysis
CVE-2020-13927 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. This vulnerability is known to be actively exploited by threat actors in an automatable fashion. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Types
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Insecure Default Initialization of Resource
The software initializes or sets a resource with a default that is intended to be changed by the administrator, but the default is not secure.
Invokable Control Element with Variadic Parameters
A named-callable or method control element has a signature that supports a variable (variadic) number of parameters or arguments.
Products Associated with CVE-2020-13927
Want to know whenever a new CVE is published for Apache AirFlow? stack.watch will email you.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.