CVE-2025-62469: Microsoft Brokering File System 本地权限提升漏洞

// CVE-2025-62469 PoC - Race Condition in Microsoft Brokering File System // This PoC demonstrates the race condition vulnerability concept // Note: This is for educational purposes only #include <windows.h> #include <stdio.h> #include <threads.h> #define MAX_ATTEMPTS 1000 volatile LONG g_shared_counter = 0; volatile BOOL g_trigger_race = FALSE; int race_thread(void* arg) { while (!g_trigger_race) { // Busy wait for trigger } // Simulate unsafe read-modify-write operation for (int i = 0; i < MAX_ATTEMPTS; i++) { LONG old_value = g_shared_counter; // Small delay to increase chance of race condition Sleep(0); LONG new_value = old_value + 1; // Check-then-act without proper synchronization if (InterlockedCompareExchange(&g_shared_counter, new_value, old_value) != old_value) { printf("Race condition detected at attempt %d\n", i); // Here attacker could manipulate the shared resource } } return 0; } int main() { printf("CVE-2025-62469 Race Condition PoC\n"); printf("Target: Microsoft Brokering File System\n\n"); thrd_t threads[4]; // Create multiple threads to trigger race condition for (int i = 0; i < 4; i++) { thrd_create(&threads[i], race_thread, NULL); } Sleep(100); // Allow threads to start g_trigger_race = TRUE; // Wait for all threads for (int i = 0; i < 4; i++) { thrd_join(threads[i], NULL); } printf("Final counter value: %ld (expected: %d)\n", g_shared_counter, MAX_ATTEMPTS * 4); printf("Race condition test completed\n"); return 0; }