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https://issues.apache.org/jira/browse/MAPREDUCE-2178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Devaraj Das updated MAPREDUCE-2178:
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Fix Version/s: 0.22.0
> Race condition in LinuxTaskController permissions handling
> ----------------------------------------------------------
>
> Key: MAPREDUCE-2178
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2178
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: security, task-controller
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Priority: Blocker
> Fix For: 0.22.0
>
>
> The linux-task-controller executable currently traverses a directory
> heirarchy and calls chown/chmod on the files inside. There is a race
> condition here which can be exploited by an attacker, causing the
> task-controller to improprly chown an arbitrary target file (via a symlink)
> to the user running a MR job. This can be exploited to escalate to root.
> [this issue was raised and discussed on the security@ list over the last
> couple of months]
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