FTP Service Allows Any Username

# SPDX-FileCopyrightText: 2005 Digital Defense Inc.
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.10990");
  script_version("2023-07-07T05:05:26+0000");
  script_tag(name:"last_modification", value:"2023-07-07 05:05:26 +0000 (Fri, 07 Jul 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:N");
  script_tag(name:"cvss_base", value:"0.0");
  script_name("FTP Service Allows Any Username");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2005 Digital Defense Inc.");
  script_family("Service detection");
  script_dependencies("ftpserver_detect_type_nd_version.nasl");
  script_require_ports("Services/ftp", 21);
  script_mandatory_keys("ftp/banner/available");

  script_tag(name:"summary", value:"The FTP service can be accessed using any username and password.

  Many other FTP plugins may trigger falsely because of this, so the scanner enable some countermeasures.");

  script_tag(name:"qod_type", value:"remote_banner");

  exit(0);
}

include("ftp_func.inc");
include("misc_func.inc");
include("port_service_func.inc");

port = ftp_get_port( default:21 );

if( ! ftp_get_banner( port:port ) )
  exit( 0 );

if( ftp_broken_random_login( port:port ) )
  log_message( port:port );

exit( 0 );