CVE-2021-38540 : What You Need to Know
Learn about CVE-2021-38540 impacting Apache Airflow versions, allowing unauthenticated users to modify variables, potentially leading to DoS, data leaks, or code execution.
Apache Airflow: Variable Import endpoint missed authentication check
Understanding CVE-2021-38540
This CVE impacts Apache Airflow versions greater than or equal to 2.0.0 and less than 2.1.3 due to an unprotected variable import endpoint.
What is CVE-2021-38540?
The variable import endpoint in Apache Airflow was left unprotected, enabling unauthenticated users to manipulate Airflow variables, potentially leading to denial of service, information leaks, or remote code execution.
The Impact of CVE-2021-38540
The vulnerability in Apache Airflow could result in severe consequences such as unauthorized data modification, information disclosure, or even the execution of malicious code by unauthorized parties.
Technical Details of CVE-2021-38540
The vulnerability is categorized under CWE-269 (Improper Privilege Management) and was identified by Apache Software Foundation.
Vulnerability Description
The absence of authentication in the variable import endpoint allowed unauthorized users to make changes to Airflow variables, posing risks of disrupting services, leaking sensitive information, or executing harmful code.
Affected Systems and Versions
Apache Airflow versions >=2.0.0 and <2.1.3 are affected by this security flaw.
Exploitation Mechanism
By exploiting the lack of authentication in the variable import endpoint, attackers could maliciously manipulate Airflow variables to disrupt operations, leak data, or execute unauthorized code.
Mitigation and Prevention
Addressing CVE-2021-38540 requires immediate actions to secure the Apache Airflow environment and prevent potential exploitation.
Immediate Steps to Take
It is recommended to upgrade Apache Airflow to version 2.1.3 or later to mitigate the vulnerability and enhance the security posture.
Long-Term Security Practices
Apart from applying the patch, ensuring robust authentication mechanisms, monitoring data access, and conducting regular security assessments are essential for long-term security.
Patching and Updates
Stay informed about security updates from Apache Airflow and promptly apply patches to protect the environment from known vulnerabilities.