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Actively exploited · Published Nov 10, 2020 · Assigned by apache

CVE-2020-13927

Critical 9.8 Exploited

In plain English

A critical-severity missing authentication in Apache Airflow. Attackers are actively exploiting it in the wild (listed by CISA on January 18, 2022). The chance it is exploited in the next 30 days is estimated at 99.8% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, Nuclei, public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)99.8%top 0.0% of all CVEs
Exploited in the wildYesCISA KEV since Jan 18, 2022
Attack tooling3Metasploit, Nuclei, Public PoC

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by Jul 18, 2022.

Official 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

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIapache-airflow1.10.11GHSA-hhx9-p69v-cx2j
PyPIapache-airflow1.10.11PYSEC-2020-18

Affected products (as reported)

VendorProductVersions
n/a Apache Airflow Apache Airflow <1.10.11

Weakness: CWE-306, CWE-1188, CWE-1056 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References