CVE-2021-26559 : Exploit Details and Defense Strategies
Learn about CVE-2021-26559 affecting Apache Airflow 2.0.0. Understand the vulnerability impact, affected systems, exploitation mechanism, and mitigation steps for enhanced security.
Apache Airflow 2.0.0 was found to have an issue, known as CWE-284 Improper Access Control, which allows users with certain roles to access sensitive information. This could lead to a privilege escalation attack.
Understanding CVE-2021-26559
This CVE refers to the vulnerability in Apache Airflow 2.0.0 that enables users with limited roles to obtain sensitive configuration information, leading to a potential privilege escalation attack.
What is CVE-2021-26559?
The vulnerability in Apache Airflow 2.0.0 allows users with Viewer or User roles to access Airflow configurations, even when specific security settings are in place. This issue could result in a privilege escalation attack.
The Impact of CVE-2021-26559
The impact of this CVE is significant as it allows unauthorized users to access sensitive information and potentially escalate their privileges within the Apache Airflow system.
Technical Details of CVE-2021-26559
CVE-2021-26559 exposes a vulnerability in Apache Airflow 2.0.0 that affects the stability of the platform, specifically related to access control configurations.
Vulnerability Description
The vulnerability arises from improper access controls on the Configurations Endpoint for the Stable API of Apache Airflow. Users with restricted roles can access Airflow configurations, even when specific security settings are applied.
Affected Systems and Versions
This vulnerability impacts Apache Airflow version 2.0.0, exposing users with Viewer or User roles to potential privilege escalation attacks.
Exploitation Mechanism
Attackers can exploit this vulnerability by leveraging the improper access control on the Configurations Endpoint in Apache Airflow 2.0.0, enabling them to access sensitive information and potentially escalate their privileges.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-26559, immediate steps need to be taken to secure the Apache Airflow environment and prevent unauthorized access.
Immediate Steps to Take
Upgrade to Airflow 2.0.1 or revoke the 'can read on Configurations' permission from roles like Viewer and Users to restrict unauthorized access to configurations.
Long-Term Security Practices
Implement strict access controls, conduct regular security audits, and educate users on best practices to enhance the overall security posture of Apache Airflow.
Patching and Updates
Stay informed about security updates from Apache Airflow and promptly apply patches to address any known vulnerabilities and enhance the security of the system.