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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1991) taskcontroller allows stealing permissions on any local file
Date Tue, 03 Aug 2010 19:47:19 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895005#action_12895005
] 

Todd Lipcon commented on MAPREDUCE-1991:
----------------------------------------

The java side implementation is already called LinuxTaskController and is pluggable. I'm not
against ifdeffing the different implementations, but I think there are some other Linux peculiarities
in the code already (eg canonicalize_file_name is GNU specific).

> 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: 0.21.0, 0.22.0
>            Reporter: Todd Lipcon
>            Priority: Blocker
>
> 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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