CVE-2026-43659 Apple竞态条件漏洞致敏感数据泄露

/* * Conceptual Proof of Concept for Race Condition (CVE-2026-43659) * This demonstrates the Time-of-Check to Time-of-Use (TOCTOU) pattern. */ #include <stdio.h> #include <pthread.h> #include <unistd.h> // Simulated sensitive flag and data int is_authorized = 0; char* secret_data = "Sensitive_User_Info"; void* malicious_thread(void* arg) { // Attacker waits for the check to start, then flips the authorization // during the vulnerable window between Check and Use. while(1) { if (is_authorized == 1) { printf("[Attacker] Race condition triggered! Flipping access...\n"); // Simulate changing the state or resource pointer is_authorized = 1; // Keep it authorized or manipulate the resource pointer break; } } return NULL; } void vulnerable_function() { printf("[System] Checking permissions...\n"); // Time of Check (TOC) if (is_authorized) { // Simulate a delay to create the race window usleep(1000); // Time of Use (TOU) // If the resource changed between check and use, we access wrong data printf("[System] Access granted. Leaking data: %s\n", secret_data); } else { printf("[System] Access denied.\n"); } } int main() { pthread_t attacker; // Set up scenario is_authorized = 0; // Create malicious thread to race with the main thread pthread_create(&attacker, NULL, malicious_thread, NULL); // Simulate the system call vulnerable_function(); pthread_join(attacker, NULL); return 0; }