apache/airflow · Security
Authentication bypass in Apache Airflow
- GHSA ID
- GHSA-hhx9-p69v-cx2j
- CVE ID
- CVE-2020-13927
- Severity
- critical
- Published
- Updated
- CVSS
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H
- CVSS v3
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H
- CVSS v4
- 9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A
Description
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
CWEs
- CWE-287 · Improper Authentication
- 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
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-13927 ↗
- https://airflow.apache.org/docs/apache-airflow/1.10.11/security.html#api-authentication ↗
- https://github.com/apache/airflow/releases/tag/1.10.11 ↗
- https://lists.apache.org/thread.html/r23a81b247aa346ff193670be565b2b8ea4b17ddbc7a35fc099c1aadd%40%3Cdev.airflow.apache.org%3E ↗
- http://packetstormsecurity.com/files/162908/Apache-Airflow-1.10.10-Remote-Code-Execution.html ↗
- http://packetstormsecurity.com/files/174764/Apache-Airflow-1.10.10-Remote-Code-Execution.html ↗
- https://github.com/apache/airflow/commit/180bca4f993b7b778a8d2c65d3d357652218922b ↗
- https://github.com/apache/airflow/commit/9e305d6b810a2a21e2591a80a80ec41acb3afed0 ↗
- https://github.com/apache/airflow/pull/9611 ↗
- https://github.com/advisories/GHSA-hhx9-p69v-cx2j ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2020-18.yaml ↗
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13927 ↗