Title     :  Microsoft Office professional Plus 2010 memory corruption
Version   :  Microsoft Office professional Plus 2010
Date      :  2012-10-25
Vendor    :  http://office.microsoft.com
Impact    :  Med/High
Contact   :  coolkaveh [at] rocketmail.com
Twitter   :  @coolkaveh
tested    :  XP SP3 ENG
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Bug :
----
memory corruption during the handling of the pub files a context-dependent attacker 
can execute arbitrary code.
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First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=00000012 ebx=00000002 ecx=00000004 edx=00000002 esi=00000000 edi=0012f7e4
eip=7855b450 esp=0012f7a4 ebp=0012f7ac iopl=0         nv up ei ng nz ac pe cy
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00210297
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\WINDOWS\WinSxS\x86_Microsoft.VC90.CRT_1fc8b3b9a1e18e3b_9.0.30729.6161_x-ww_31a54e43\MSVCR90.dll - 
MSVCR90!memmove+0x140:
7855b450 8b448ef0        mov     eax,dword ptr [esi+ecx*4-10h] ds:0023:00000000=????????
0:000>!exploitable -v
eax=00000012 ebx=00000002 ecx=00000004 edx=00000002 esi=00000000 edi=0012f7e4
eip=7855b450 esp=0012f7a4 ebp=0012f7ac iopl=0         nv up ei ng nz ac pe cy
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00210297
MSVCR90!memmove+0x140:
7855b450 8b448ef0        mov     eax,dword ptr [esi+ecx*4-10h] ds:0023:00000000=????????
HostMachine\HostUser
Executing Processor Architecture is x86
Debuggee is in User Mode
Debuggee is a live user mode debugging session on the local machine
Event Type: Exception
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for ntdll.dll - 
*** ERROR: Module load completed but symbols could not be loaded for mspub.exe
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\Program Files\Common Files\Microsoft Shared\office14\mso.dll - 
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\WINDOWS\system32\USER32.dll - 
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for C:\WINDOWS\system32\kernel32.dll - 
Exception Faulting Address: 0x0
First Chance Exception Type: STATUS_ACCESS_VIOLATION (0xC0000005)
Exception Sub-Type: Read Access Violation

Faulting Instruction:7855b450 mov eax,dword ptr [esi+ecx*4-10h]

Basic Block:
    7855b450 mov eax,dword ptr [esi+ecx*4-10h]
       Tainted Input Operands: ecx, esi
    7855b454 mov dword ptr [edi+ecx*4-10h],eax
       Tainted Input Operands: eax, ecx
    7855b458 mov eax,dword ptr [esi+ecx*4-0ch]
       Tainted Input Operands: ecx, esi
    7855b45c mov dword ptr [edi+ecx*4-0ch],eax
       Tainted Input Operands: eax, ecx
    7855b460 mov eax,dword ptr [esi+ecx*4-8]
       Tainted Input Operands: ecx, esi
    7855b464 mov dword ptr [edi+ecx*4-8],eax
       Tainted Input Operands: eax, ecx
    7855b468 mov eax,dword ptr [esi+ecx*4-4]
       Tainted Input Operands: ecx, esi
    7855b46c mov dword ptr [edi+ecx*4-4],eax
       Tainted Input Operands: eax, ecx
    7855b470 lea eax,[ecx*4]
       Tainted Input Operands: ecx
    7855b477 add esi,eax
       Tainted Input Operands: eax, esi
    7855b479 add edi,eax
       Tainted Input Operands: eax
    7855b47b jmp dword ptr msvcr90!memmove+0x174 (7855b484)[edx*4]

Exception Hash (Major/Minor): 0x56372064.0x42094b36

Stack Trace:
MSVCR90!memmove+0x140
mspub+0x83638
mspub+0x63f02
mspub+0x64189
mspub+0x64c1b
mso!Ordinal5220+0x676
mso!Ordinal7862+0x547
mspub+0x98ca5
mspub+0x953fe
USER32!GetDC+0x6d
USER32!GetDC+0x14f
USER32!DefWindowProcW+0x180
USER32!DefWindowProcW+0x1cc
ntdll!KiUserCallbackDispatcher+0x13
USER32!DispatchMessageW+0xf
mso!Ordinal9774+0x23
mspub+0x341c0
mspub+0x212d
mspub+0x20d0
mspub+0x2083
kernel32!RegisterWaitForInputIdle+0x49
Instruction Address: 0x000000007855b450

Description: Data from Faulting Address controls subsequent Write Address
Short Description: TaintedDataControlsWriteAddress
Exploitability Classification: PROBABLY_EXPLOITABLE
Recommended Bug Title: Probably Exploitable - Data from Faulting Address controls subsequent Write Address starting at MSVCR90!memmove+0x0000000000000140 (Hash=0x56372064.0x42094b36)

The data from the faulting address is later used as the target for a later write.
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Proof of concept included.