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From "Brian Bockelman (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8025) change default distcp log location to be /tmp rather than cwd
Date Mon, 06 Feb 2012 23:16:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13201756#comment-13201756
] 

Brian Bockelman commented on HADOOP-8025:
-----------------------------------------

Hi Allen,

Writing into /tmp is pretty scary to me due to things like symlink attacks.  (If I want to
find a security bug in a project, a simple place to start is to grep for usage of "/tmp").
 It's not obvious to me whether or not the suggested patch opens distcp to symlink attacks.

If the proper flags are indeed used later on, I would suggest adding a comment to this patch
pointing out why its not a problem.

Brian

PS - I'm probably a touch grouchy about this because I file tickets for user applications
approximately monthly for leaving cruft in /tmp!  Once it gets in the code, it never seems
to escape.
                
> change default distcp log location to be /tmp rather than cwd
> -------------------------------------------------------------
>
>                 Key: HADOOP-8025
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8025
>             Project: Hadoop Common
>          Issue Type: Improvement
>    Affects Versions: 1.0.0
>            Reporter: Allen Wittenauer
>            Priority: Trivial
>         Attachments: HADOOP-8025-branch-1.0.txt
>
>
> distcp loves to leave emtpy files around.  this puts them in /tmp so at least they are
easy to find and kill.

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