CVE-2021-41571 Explained : Impact and Mitigation
Discover the Apache Pulsar Admin API vulnerability (CVE-2021-41571) allowing unauthorized data access from different tenants. Learn about the impact, affected versions, and mitigation steps.
In Apache Pulsar, a vulnerability allows unauthorized access to data from other tenants.
Understanding CVE-2021-41571
Apache Pulsar's Admin API vulnerability allows users to access unauthorized data.
What is CVE-2021-41571?
A flaw in Apache Pulsar enables users to read data from BookKeeper not allocated to them.
The Impact of CVE-2021-41571
- Limited authorization controls allow reading from another tenant's ledger.
Technical Details of CVE-2021-41571
This section delves into the technical aspects of the vulnerability.
Vulnerability Description
Unauthorized access to data from BookKeeper in Apache Pulsar due to insufficient validation.
Affected Systems and Versions
- Apache Pulsar <= 2.8.0, <= 2.7.3, and <= 2.6.4
Exploitation Mechanism
- Users input topic and ledger ID, bypassing authorization controls.
Mitigation and Prevention
Guidelines to mitigate and prevent exploitation of CVE-2021-41571.
Immediate Steps to Take
- Disable REST API access for flawed APIs when behind a proxy.
Long-Term Security Practices
- Implement strict authentication and authorization protocols.
- Regular security assessments to identify vulnerabilities.
Patching and Updates
- Update to the latest version of Apache Pulsar to address the vulnerability.