D-Link DSL-2875AL/DSL-2877AL Information Disclosure 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("1.3.6.1.4.1.25623.1.0.142877");
  script_version("2025-06-26T05:40:52+0000");
  script_tag(name:"last_modification", value:"2025-06-26 05:40:52 +0000 (Thu, 26 Jun 2025)");
  script_tag(name:"creation_date", value:"2019-09-12 06:55:38 +0000 (Thu, 12 Sep 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:"2020-03-23 20:14:00 +0000 (Mon, 23 Mar 2020)");

  script_cve_id("CVE-2019-15656");

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

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

  script_name("D-Link DSL-2875AL/DSL-2877AL Information Disclosure Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_dlink_dsl_consolidation.nasl");
  script_mandatory_keys("d-link/dsl/http/detected");

  script_tag(name:"summary", value:"D-Link DSL-2875AL and DSL-2877AL are prone to an information
  disclosure vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request and checks the response.");

  script_tag(name:"insight", value:"It is possible to read the username and password used to connect
  to the ISP by examining the HTML code of /cgi-bin/index.asp.");

  script_tag(name:"affected", value:"D-Link DSL-2875AL prior to firmware version 1.00.08AU 20161011
  and D-Link DSL-2877AL prior to firmware version 1.00.20AU 20180327.");

  script_tag(name:"solution", value:"Update firmware to version 1.00.08AU 20161011 (DSL-2875AL),
  1.00.20AU 20180327 (DSL-2877AL) or later.");

  script_xref(name:"URL", value:"https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=26165");

  exit(0);
}

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

cpe_list = make_list("cpe:/o:dlink:dsl-2875al_firmware",
                     "cpe:/o:dlink:dsl-2877al_firmware");

if (!infos = get_app_port_from_list(cpe_list: cpe_list, service: "www"))
  exit(0);

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

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

url = "/cgi-bin/index.asp";

if (http_vuln_check(port: port, url: url, pattern: "var username_v = '", check_header: TRUE,
                    extra_check: "var password_v = '")) {
  report = http_report_vuln_url(port: port, url: url);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);