D-Link DIR-816 A1 1.06 Authentication Bypass Vulnerability

# SPDX-FileCopyrightText: 2019 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("1.3.6.1.4.1.25623.1.0.113548");
  script_version("2025-07-02T05:41:52+0000");
  script_tag(name:"last_modification", value:"2025-07-02 05:41:52 +0000 (Wed, 02 Jul 2025)");
  script_tag(name:"creation_date", value:"2019-10-24 11:57:55 +0200 (Thu, 24 Oct 2019)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-15 20:41:00 +0000 (Tue, 15 Oct 2019)");

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

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

  script_cve_id("CVE-2019-17507");

  script_name("D-Link DIR-816 A1 1.06 Authentication Bypass Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Web application abuses");

  # nb: Experiences in the past have shown that various different devices are affected
  script_dependencies("gb_dlink_dsl_consolidation.nasl", "gb_dlink_dap_consolidation.nasl",
                      "gb_dlink_dir_consolidation.nasl", "gb_dlink_dwr_consolidation.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("d-link/http/detected");

  script_tag(name:"summary", value:"D-Link DIR-816 A1 devices are prone to an authentication bypass
  vulnerability.");

  script_tag(name:"vuldetect", value:"Tries to access a sensitive page without authentication.");

  script_tag(name:"insight", value:"If a user is unauthenticated, sensitive sites are served with the
  line 'top.location.href = /dir_login.asp' at the top. A client could be configured to ignore that an
  access the page anyway.");

  script_tag(name:"impact", value:"Successful exploitation would allow an attacker to gain
  administrative access without authentication.");

  script_tag(name:"affected", value:"D-Link DIR-816 A1 firmware version 1.06.
  Other devices might also be affected.");

  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://github.com/dahua966/Routers-vuls/blob/master/DIR-816/vuls_info.md");

  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 = "";

vuln_url = dir + '/version.asp';

buf = http_get_cache( item: vuln_url, port: port );

if( buf =~ "^HTTP/1\.[01] 200" && buf =~ 'var ModemVer' ) {
  report = http_report_vuln_url( url: vuln_url, port: port );
  security_message( data: report, port: port );
  exit( 0 );
}

exit( 99 );