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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-1994) Linux task-controller determines its own path insecurely
Date Sat, 07 Aug 2010 00:04:18 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-1994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated MAPREDUCE-1994:
-----------------------------------

    Attachment: mapreduce-1994-prelim.txt

Here's a prelim patch to clean this up a bit. There's a bit more cleanup to be done, and this
hasn't been through much testing, but I'm headed on vacation next week and I think Devaraj
wanted to take this over.

> Linux task-controller determines its own path insecurely
> --------------------------------------------------------
>
>                 Key: MAPREDUCE-1994
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1994
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: security, task-controller
>    Affects Versions: 0.22.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>         Attachments: mapreduce-1994-prelim.txt
>
>
> The task-controller uses argv[0] to determine its own path, and then calls stat() on
that. Instead it should stat("/proc/self/exe") directly. This is important since argv[0] can
be spoofed to point to another program and thus either fool the autodetection of HADOOP_HOME
or evade various permissions checks.

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