CVE-2026-28822 Apple类型混淆导致应用拒绝服务漏洞

/* * PoC for CVE-2026-28822 (Type Confusion Simulation) * This code simulates a type confusion scenario leading to a crash. * Compile: gcc -o poc_cve2026_28822 poc_cve2026_28822.c */ #include <stdio.h> #include <stdlib.h> #include <string.h> // Define two different structures with size relationship to facilitate confusion typedef struct { char id[4]; void (*func_ptr)(void); } SafeObject; typedef struct { char data[16]; } MaliciousObject; // Function representing legitimate operations void legitimate_function() { printf("Executing legitimate function.\n"); } // Function representing the crash/exploit payload void payload_function() { printf("[!] Type confusion triggered! Executing unexpected code path.\n"); // Simulate application termination/crash abort(); } int main() { printf("[*] Starting PoC for CVE-2026-28822...\n"); // 1. Allocate an object of SafeObject and initialize it SafeObject *safe_obj = (SafeObject *)malloc(sizeof(SafeObject)); safe_obj->func_ptr = legitimate_function; printf("[*] SafeObject created. Function pointer: %p\n", safe_obj->func_ptr); // 2. Simulate the vulnerability: Reinterpret the memory as MaliciousObject // In a real scenario, this might happen due to a casting bug or buffer overflow MaliciousObject *malicious_obj = (MaliciousObject *)safe_obj; // 3. Corrupt the memory space overlapping with the function pointer // Overwriting the 'func_ptr' of SafeObject with data from MaliciousObject memset(malicious_obj->data, 0x41, 16); // For demonstration, we forcefully change the pointer to our payload // to simulate the result of the confusion logic safe_obj->func_ptr = payload_function; printf("[*] Memory corrupted via type confusion.\n"); printf("[*] Attempting to call the function pointer...\n"); // 4. Trigger the vulnerability if (safe_obj->func_ptr != NULL) { safe_obj->func_ptr(); } free(safe_obj); return 0; }