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https://issues.apache.org/jira/browse/MAPREDUCE-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon resolved MAPREDUCE-1991.
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Resolution: Invalid
This was fixed as a side effect of MAPREDUCE-2378, I believe. I verified it's
fixed in 0.20-security and in MR2's LinuxContainerExecutor
> taskcontroller allows stealing permissions on any local file
> ------------------------------------------------------------
>
> Key: MAPREDUCE-1991
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1991
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: task-controller
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: 0.22.0
>
> Attachments: mapreduce-1991-v2.txt, mapreduce-1991.txt
>
>
> The linux task-controller setuid binary allows a malicious user to chmod any
> file on the system to 644 (and as a side effect appends some junk to the end)
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