[CVE-2018-11764] Apache Hadoop Privilege escalation in web endpoint

[Akira Ajisaka <aajisaka () apache org>]

CVE-2018-11764: Apache Hadoop Privilege escalation in web endpoint

Severity: Critical

Vendor: The Apache Software Foundation

Versions affected:
3.0.0-alpha4, 3.0.0-beta1, and 3.0.0

Description:
Web endpoint authentication check is broken. Authenticated users may
impersonate any user even if no proxy user is configured.

Mitigation:
Users should upgrade to Apache Hadoop 3.0.1 or upper.

Credit:
This issue was discovered by Daryn Sharp.