D-Link DIR Routers SharePort Authentication Bypass Vulnerability (Mar 2018) - Active Check

# SPDX-FileCopyrightText: 2018 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-or-later

if( description )
{
  script_oid("1.3.6.1.4.1.25623.1.0.113146");
  script_version("2023-11-21T05:05:52+0000");
  script_tag(name:"last_modification", value:"2023-11-21 05:05:52 +0000 (Tue, 21 Nov 2023)");
  script_tag(name:"creation_date", value:"2018-03-29 09:53:55 +0200 (Thu, 29 Mar 2018)");
  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_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-04-23 15:48:00 +0000 (Fri, 23 Apr 2021)");

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

  script_tag(name:"solution_type", value:"WillNotFix");

  script_cve_id("CVE-2018-9032");

  script_name("D-Link DIR Routers SharePort Authentication Bypass Vulnerability (Mar 2018) - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_dlink_dir_consolidation.nasl");
  script_require_ports("Services/www", 8080);
  script_mandatory_keys("d-link/dir/http/detected"); # TBD: Check all D-Link devices like in others?

  script_tag(name:"summary", value:"D-Link DIR Routers are prone to an authentication bypass
  vulnerability.");

  script_tag(name:"vuldetect", value:"Send a crafted HTTP GET request and tries to access protected
  information without authentication.");

  script_tag(name:"insight", value:"The directories '/category_view.php' and '/folder_view.php' can
  be accessed directly without authentication.");

  script_tag(name:"impact", value:"Successful exploitation would allow an attacker to access
  information about the target system that would normally require authentication.");

  script_tag(name:"affected", value:"D-Link DIR Routers with SharePort functionality and firmware
  versions through 2.06.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

  script_xref(name:"URL", value:"https://www.youtube.com/watch?v=Wmm4p8znS3s");
  script_xref(name:"URL", value:"https://www.exploit-db.com/exploits/44378");

  exit(0);
}

CPE_PREFIX = "cpe:/o:dlink";

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

if ( ! infos = get_app_port_from_cpe_prefix( cpe: CPE_PREFIX, service: "www" ) )
  exit( 0 );

port = infos["port"];
CPE = infos["cpe"];

if ( ! dir = get_app_location( cpe: CPE, port: port ) )
  exit( 0 );

if ( dir == "/" )
  dir = "";

foreach vuln_file ( make_list( "/folder_view.php", "/category_view.php" ) ) {

  url = dir + vuln_file;
  req = http_get( port: port, item: url );
  res = http_keepalive_send_recv( port: port, data: req );

  if( res && res =~ "^HTTP/1\.[01] 200" && res =~ "<title>SharePort Web Access</title>" && res =~ 'href="webfile_css/layout\\.css"' ) {
    report = http_report_vuln_url( port: port, url: url );
    security_message( port: port, data: report );
    exit( 0 );
  }
}

exit( 99 );