CVE-2018-11766: Apache Hadoop privilege escalation vulnerability

[Akira Ajisaka <aajisaka () apache org>]

CVE-2018-11766: Apache Hadoop privilege escalation vulnerability

Severity: Critical

Vendor: The Apache Software Foundation

Versions Affected:
Apache Hadoop versions from 2.7.4 to 2.7.6

Description:
In Apache Hadoop 2.7.4 to 2.7.6, the security fix for CVE-2016-6811 is
incomplete.
A user who can escalate to yarn user can possibly run arbitrary
commands as root user.

Mitigation:
Users should upgrade to 2.7.7 or upper.
If you are using the affected version of Apache Hadoop and there are
any users who can escalate to yarn user and cannot escalate to root user,
remove the permission to escalate to yarn user from them.

Credit:
This issue was discovered by Wilfred Spiegelenburg.