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Date: Tue, 2 Feb 2010 05:52:19 +0000 (UTC)
From: "Amareshwari Sriramadasu (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Updated: (MAPREDUCE-899) When using LinuxTaskController,
 localized files may become accessible to unintended users if permissions
 are misconfigured.
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-899?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Amareshwari Sriramadasu updated MAPREDUCE-899:
----------------------------------------------

    Release Note: Added configuration "mapreduce.tasktracker.group", a group name to which TaskTracker belongs. When LinuxTaskController is used, task-controller binary's group owner should be this group. The same should be specified in task-controller.cfg also.

> When using LinuxTaskController, localized files may become accessible to unintended users if permissions are misconfigured.
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-899
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-899
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: tasktracker
>            Reporter: Vinod K V
>            Assignee: Amareshwari Sriramadasu
>             Fix For: 0.22.0
>
>         Attachments: MAPREDUCE-899-20090828.txt, patch-899-1.txt, patch-899-2.txt, patch-899-3.txt, patch-899-4.txt, patch-899-5.txt, patch-899-6.txt, patch-899-7.txt, patch-899.txt, testplan.txt
>
>
> To enforce the accessibility of job files to only the job-owner and the TaskTracker, as per MAPREDUCE-842, it is _trusted_ that the  setuid/setgid linux TaskController binary is group owned by a _special group_ to which only TaskTracker belongs and not just any group to which TT belongs. If the trust is broken, possibly due to misconfiguration by admins, the local files become accessible to unintended users, yet giving false sense of security to the admins.

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