CVE-2025-43238 macOS整数溢出漏洞

#include <stdio.h> #include <stdlib.h> /* * Conceptual PoC for Integer Overflow leading to Crash * This simulates the vulnerability condition described in CVE-2025-43238. * Note: This is a generic simulation, not the actual exploit code. */ void trigger_overflow(size_t count, size_t size) { // Check for potential integer overflow before allocation if (count > 0 && size > SIZE_MAX / count) { printf("Overflow detected! Aborting.\n"); return; } // Vulnerable logic (simplified) size_t total = count * size; // If total overflows (wraps around to a small value), malloc succeeds // but subsequent memory operations cause heap corruption/crash. char *buffer = (char *)malloc(total); if (buffer == NULL) { printf("Memory allocation failed.\n"); return; } // Attempt to fill the buffer, causing Segmentation Fault if overflow occurred for (size_t i = 0; i < count; i++) { buffer[i * size] = 'A'; // Crash happens here if total was incorrect } free(buffer); } int main() { printf("Simulating CVE-2025-43238 Integer Overflow...\n"); // Pass values that cause count * size to overflow size_t trigger_overflow(0x100000000, 0x10); return 0; }