CVE-2018-11764 : Exploit Details and Defense Strategies
Learn about CVE-2018-11764 affecting Apache Hadoop versions 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0. Find out how authenticated users can impersonate any user due to a broken authentication check.
Apache Hadoop versions 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0 have a vulnerability that allows authenticated users to impersonate any user due to a broken web endpoint authentication check.
Understanding CVE-2018-11764
This CVE entry pertains to a privilege escalation vulnerability in Apache Hadoop versions 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0.
What is CVE-2018-11764?
The authentication check for web endpoints is not functioning properly in Apache Hadoop versions 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0. This issue allows authenticated users to assume the identity of any user, even in the absence of a configured proxy user.
The Impact of CVE-2018-11764
- Authenticated users can impersonate any user within the system.
- This vulnerability can lead to unauthorized access and potential misuse of privileges.
Technical Details of CVE-2018-11764
This section provides more in-depth technical details about the CVE.
Vulnerability Description
The vulnerability in Apache Hadoop versions 3.0.0-alpha4, 3.0.0-beta1, and 3.0.0 arises from a malfunction in the authentication check for web endpoints, enabling unauthorized user impersonation.
Affected Systems and Versions
- Product: Apache Hadoop
- Versions: 3.0.0-alpha4, 3.0.0-beta1, 3.0.0
Exploitation Mechanism
The issue allows authenticated users to exploit the broken authentication check to impersonate any user, even without a configured proxy user.
Mitigation and Prevention
Protect your systems from CVE-2018-11764 with these mitigation strategies.
Immediate Steps to Take
- Update Apache Hadoop to a patched version that addresses the authentication check vulnerability.
- Monitor user activities for any suspicious behavior indicating unauthorized access.
Long-Term Security Practices
- Implement strict access controls and least privilege principles to limit user capabilities.
- Regularly audit and review user permissions to prevent privilege escalation.
Patching and Updates
- Stay informed about security updates and patches released by Apache for Apache Hadoop.