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From "Amar Kamat (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-181) mapred.system.dir should be accessible only to hadoop daemons
Date Fri, 14 Aug 2009 09:11:14 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743145#action_12743145
] 

Amar Kamat commented on MAPREDUCE-181:
--------------------------------------

MAPREDUCE-807 is one more reason why we should close mapred.system.dir

> mapred.system.dir should be accessible only to hadoop daemons 
> --------------------------------------------------------------
>
>                 Key: MAPREDUCE-181
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-181
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>         Attachments: hadoop-3578-branch-20-example-2.patch, hadoop-3578-branch-20-example.patch,
HADOOP-3578-v2.6.patch, HADOOP-3578-v2.7.patch
>
>
> Currently the jobclient accesses the {{mapred.system.dir}} to add job details. Hence
the {{mapred.system.dir}} has the permissions of {{rwx-wx-wx}}. This could be a security loophole
where the job files might get overwritten/tampered after the job submission. 

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