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From "Robert Levas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-18836) Remove group readable from hdfs headless keytab
Date Wed, 09 Nov 2016 22:38:58 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-18836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15652265#comment-15652265
] 

Robert Levas commented on AMBARI-18836:
---------------------------------------

[~Wancy]...

Have you enabled all services after making this change? I have a feeling there may be issues
in startup (after install) or in service checks. 


> Remove group readable from hdfs headless keytab
> -----------------------------------------------
>
>                 Key: AMBARI-18836
>                 URL: https://issues.apache.org/jira/browse/AMBARI-18836
>             Project: Ambari
>          Issue Type: Bug
>    Affects Versions: 2.4.2
>            Reporter: Shi Wang
>            Assignee: Shi Wang
>         Attachments: 0001-AMBARI-18836-Remove-group-readable-from-hdfs-headles.patch
>
>
> The Smoke and “Headless” Service users are used by Ambari to perform service “smoke”
checks and run alert health checks. 
> The permission for hdfs.headless.keytab is 440. But it will cause security concern to
allow other service user in hadoop group to kinit hdfs headless principal using hdfs.headless.keytab.
In this way, other service user could "pretend" to be hdfs user and be granted hdfs user's
authorities.



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