Zebra PrintServer Default Credentials (Telnet)

# SPDX-FileCopyrightText: 2015 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("1.3.6.1.4.1.25623.1.0.111061");
  script_version("2023-07-26T05:05:09+0000");
  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("Zebra PrintServer Default Credentials (Telnet)");
  script_tag(name:"last_modification", value:"2023-07-26 05:05:09 +0000 (Wed, 26 Jul 2023)");
  script_tag(name:"creation_date", value:"2015-11-25 11:00:00 +0100 (Wed, 25 Nov 2015)");
  script_category(ACT_ATTACK);
  script_family("Default Accounts");
  script_copyright("Copyright (C) 2015 SCHUTZWERK GmbH");
  script_dependencies("telnetserver_detect_type_nd_version.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/telnet", 23);
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"The remote Zebra PrintServer has a default password 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 telnet service and try to login with a default password.");

  script_tag(name:"insight", value:"It was possible to login with default password 1234.");

  script_tag(name:"solution", value:"Change/Set the password.");

  script_xref(name:"URL", value:"https://support.zebra.com/cpws/docs/znet2/ps_firm/znt2_pwd.html");

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

port = telnet_get_port( default:23 );

soc = open_sock_tcp( port );
if( ! soc )
  exit( 0 );

recv = recv( socket:soc, length:1024 );

if( "ZebraNet" >< recv || "Internal Wired PS Configuration Utility" >< recv ||
    "Type your password. Press Enter when finished." >< recv ) {

  send( socket:soc, data:'1234\r\n' );
  recv = recv( socket:soc, length:1024 );

  if( "Show Configuration/Status" >< recv || "Restore to Factory Defaults" >< recv ||
       "Specify Print Server IP Address" >< recv || "TCP Connection Configuration" >< recv ) {
    close( soc );
    security_message( port:port, data:"It was possible to login using the default password '1234'" );
    exit( 0 );
  }
}

close( soc );

exit( 99 );