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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HADOOP-15162) UserGroupInformation.createRemoteUser hardcode authentication method to SIMPLE
Date Wed, 10 Jan 2018 18:51:01 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-15162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Eric Yang resolved HADOOP-15162.
    Resolution: Not A Problem

Close this as not a problem.  Bad assumption for SIMPLE security mode doesn't check for proxy
ACL.  I verified that SIMPLE security mode also checks for proxy ACL.  UGI.createRemoteUser(remoteUser)
has no effect to proxy ACL check.  Thanks to [~jlowe] and [~daryn] for advices and recommendations.

> UserGroupInformation.createRemoteUser hardcode authentication method to SIMPLE
> ------------------------------------------------------------------------------
>                 Key: HADOOP-15162
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15162
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>            Reporter: Eric Yang
> {{UserGroupInformation.createRemoteUser(String user)}} is hard coded Authentication method
to SIMPLE by HADOOP-10683.  This by passed proxyuser ACL check, isSecurityEnabled check, and
allow caller to impersonate as anyone.  This method could be abused in the main code base,
which can cause part of Hadoop to become insecure without proxyuser check for both SIMPLE
or Kerberos enabled environment.

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