nas4free Default Admin Credentials (HTTP)

# SPDX-FileCopyrightText: 2014 Greenbone AG
# 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("1.3.6.1.4.1.25623.1.0.105055");
  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("nas4free Default Admin Credentials (HTTP)");
  script_tag(name:"last_modification", value:"2023-07-26 05:05:09 +0000 (Wed, 26 Jul 2023)");
  script_tag(name:"creation_date", value:"2014-07-02 12:02:06 +0200 (Wed, 02 Jul 2014)");
  script_category(ACT_ATTACK);
  script_tag(name:"qod_type", value:"remote_vul");
  script_family("Default Accounts");
  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_dependencies("gb_nas4free_detect.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("nas4free/installed");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"The remote nas4free web interface is using known default credentials.");

  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:"Try to login with default credentials.");

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

  script_tag(name:"solution", value:"Change the password.");
  script_tag(name:"solution_type", value:"Mitigation");

  exit(0);
}

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

CPE = "cpe:/a:nas4free:nas4free";

include("http_func.inc");
include("host_details.inc");

if( ! port = get_app_port( cpe:CPE ) )
  exit( 0 );

if( ! get_app_location( cpe:CPE, port:port, nofork:TRUE ) )
  exit( 0 );

url = "/login.php";
postData = "username=admin&password=nas4free";
useragent = http_get_user_agent();
len = strlen( postData );

host = http_host_name(port:port);

req = 'POST /login.php HTTP/1.1\r\n' +
      'Host: ' + host + '\r\n' +
      'User-Agent: ' + useragent + '\r\n' +
      'Accept-Encoding: identity\r\n' +
      'Referer: http://' + host + '/login.php' + '\r\n' +
      'Content-Type: application/x-www-form-urlencoded\r\n' +
      'Content-Length: ' + len + '\r\n' +
      '\r\n' +
      postData;
result = http_send_recv( port:port, data:req, bodyonly:FALSE );

if( result =~ "HTTP/1.1 302" && "index.php" >< result )
{
  co = eregmatch( pattern:'Set-Cookie: ([^\r\n]+)', string: result );
  if( isnull( co[1] ) ) exit( 99 );

  req = 'GET /index.php HTTP/1.1\r\n' +
        'Host: ' + host + '\r\n' +
        'User-Agent: ' + useragent + '\r\n' +
        'Cookie: ' + co[1] + '\r\n\r\n';

  buf = http_send_recv( port:port, data:req, bodyonly:FALSE );

  if( "system.php" >< buf && "logout.php" >< buf )
  {
    report = 'It was possible to login with user "admin" and password "nas4free".';
    security_message( port:port, data:report );
    exit( 0 );
  }
}

exit( 99 );