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From "Goldstein Lyor (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SSHD-605) VirtualFileSystemFactory allows escaping from root
Date Tue, 12 Apr 2016 17:28:25 GMT

    [ https://issues.apache.org/jira/browse/SSHD-605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15237590#comment-15237590
] 

Goldstein Lyor commented on SSHD-605:
-------------------------------------

See also _SftpTest#testCannotEscapeUserRoot_ that specifically tests this issue - including
special handling for _Windows_. Need to understand how come the test did not catch the described
escape.

> VirtualFileSystemFactory allows escaping from root
> --------------------------------------------------
>
>                 Key: SSHD-605
>                 URL: https://issues.apache.org/jira/browse/SSHD-605
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 1.0.0
>         Environment: Windows, JDK 7
>            Reporter: Damien B
>            Assignee: Goldstein Lyor
>              Labels: security
>             Fix For: 1.1.0
>
>
> Possibly Windows only.
> I start a SFTP server like this:
> sshd = SshServer.setUpDefaultServer();
> [...]
> sshd.setFileSystemFactory(new VirtualFileSystemFactory(myRootDir.getCanonicalPath()));
> [...]
> sshd.setSubsystemFactories(Arrays.<NamedFactory<Command>>asList(new SftpSubsystemFactory()));
> I connect to the server with FileZilla.
> Upon connexion, the files in myRooDir correctly appear under the server path '/'. But
if I cd to '/c:/Windows/', the files in C:\Windows\ appear, escaping the VFS root.



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