Janitza Multiple Devices Default Credentials (FTP)

# SPDX-FileCopyrightText: 2016 SCHUTZWERK GmbH
# 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-or-later

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.111104");
  script_version("2023-07-26T05:05:09+0000");
  script_cve_id("CVE-2015-3968");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_name("Janitza Multiple Devices Default Credentials (FTP)");
  script_tag(name:"last_modification", value:"2023-07-26 05:05:09 +0000 (Wed, 26 Jul 2023)");
  script_tag(name:"creation_date", value:"2016-06-11 11:12:12 +0200 (Sat, 11 Jun 2016)");
  script_category(ACT_ATTACK);
  script_family("Default Accounts");
  script_copyright("Copyright (C) 2016 SCHUTZWERK GmbH");
  script_dependencies("ftpserver_detect_type_nd_version.nasl", "DDI_FTP_Any_User_Login.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/ftp", 21);
  script_mandatory_keys("ftp/ready_banner/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_xref(name:"URL", value:"https://wiki.janitza.de/display/GRIDVIS40/UMG+604+-+Passwort");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/77291");

  script_tag(name:"summary", value:"The remote Janitza device has default credentials set.");

  script_tag(name:"impact", value:"This issue may be exploited by a remote attacker to gain
  access to sensitive information or modify system configuration.");

  script_tag(name:"vuldetect", value:"Connect to the FTP service and try to login with default credentials.");

  script_tag(name:"insight", value:"It was possible to login with default credentials: 'admin:Janitza', 'user:Janitza' or 'guest:Janitza'.");

  script_tag(name:"solution", value:"Change the default username and password.");

  script_tag(name:"affected", value:"Janitza UMG 508, 509, 511, 604, and 605 devices.");

  script_tag(name:"qod_type", value:"remote_vul");
  script_tag(name:"solution_type", value:"Workaround");

  exit(0);
}

if(get_kb_item("default_credentials/disable_default_account_checks"))
  exit(0);

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

report = 'It was possible to login using the following default credentials:\n';

creds = make_array( "admin", "Janitza",
                    "user", "Janitza",
                    "guest", "Janitza" );

port = ftp_get_port( default:21 );

if( ftp_broken_random_login( port:port) )
  exit( 0 );

banner = ftp_get_banner( port:port );

if( ! banner || "220 Ready" >!< banner )
  exit( 0 );

foreach cred( keys( creds ) ) {

  if( ! soc = ftp_open_socket( port:port ) )
    continue;

  if( ftp_authenticate( socket:soc, user:cred, pass:creds[cred], skip_banner:TRUE ) ) {
    report += '\n' + cred + ":" + creds[cred];
    VULN = TRUE;
  }
  ftp_close( socket:soc );
}

if( VULN ) {
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );