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From "Ranjit Mathew (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-6898) FileSystem.copyToLocal creates files with 777 permissions
Date Wed, 04 Aug 2010 03:49:16 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-6898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895130#action_12895130
] 

Ranjit Mathew commented on HADOOP-6898:
---------------------------------------

Is there no umask set for the corresponding user?

(Even if the default permissions are 777, the umask setting should have stripped some of them
out upon file-creation.)

> FileSystem.copyToLocal creates files with 777 permissions
> ---------------------------------------------------------
>
>                 Key: HADOOP-6898
>                 URL: https://issues.apache.org/jira/browse/HADOOP-6898
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs, security
>            Reporter: Todd Lipcon
>            Priority: Critical
>             Fix For: 0.22.0
>
>
> FileSystem.copyToLocal ends up calling through to FileUtil.copy, which calls create()
on the target file system without passing any permission object. Therefore, the file ends
up getting created locally with 777 permissions, which is dangerous -- even if the caller
then fixes up permissions afterwards, it exposes a window in which an attacker can open the
file.

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