Western Digital My Cloud Multiple Products 5.0 < 5.15.106 Unauthorized Access Vulnerability (WDC-21009)

# Copyright (C) 2021 Greenbone Networks GmbH
# 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
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117567");
  script_version("2022-05-30T09:32:02+0000");
  script_tag(name:"last_modification", value:"2022-05-30 09:32:02 +0000 (Mon, 30 May 2022)");
  script_tag(name:"creation_date", value:"2021-07-16 05:57:29 +0000 (Fri, 16 Jul 2021)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-01-20 15:15:00 +0000 (Wed, 20 Jan 2021)");

  script_cve_id("CVE-2015-4000");

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

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

  script_name("Western Digital My Cloud Multiple Products 5.0 < 5.15.106 Unauthorized Access Vulnerability (WDC-21009)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_wd_mycloud_consolidation.nasl");
  script_mandatory_keys("wd-mycloud/detected");

  script_tag(name:"summary", value:"Multiple Western Digital My Cloud products are prone to a
  vulnerability that could allow unauthorized access via SSH.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"My Cloud devices were using weak 1024-bit DSA keys that could
  allow the device to be impersonated. This could lead to credential theft, which might eventually
  cause a device compromise. However, since RSA keys are the default for modern SSH clients, the
  impact of this vulnerability is limited to older SSH clients or if an attacker blocks a client
  from using RSA keys. My Cloud Firmware 5.15.106 contains updates to harden the SSH configuration
  and improve the security of the My Cloud devices.");

  script_tag(name:"affected", value:"Western Digital My Cloud PR2100, My Cloud PR4100, My Cloud EX2
  Ultra, My Cloud EX2100, My Cloud EX4100, My Cloud Mirror Gen 2, My Cloud DL2100, My Cloud DL4100,
  My Cloud (P/N: WDBCTLxxxxxx-10) and WD Cloud (Japan) with firmware versions prior to 5.15.106.");

  script_tag(name:"solution", value:"Update to firmware version 5.15.106 or later.");

  script_xref(name:"URL", value:"https://www.westerndigital.com/support/productsecurity/wdc-21009-my-cloud-firmware-version-5-15-106");
  script_xref(name:"URL", value:"https://community.wd.com/t/my-cloud-os-5-firmware-release-note-v5-15-106/269010");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

cpe_list = make_list("cpe:/o:wdc:wd_cloud_firmware",
                     "cpe:/o:wdc:my_cloud_firmware",
                     "cpe:/o:wdc:my_cloud_mirror_firmware",
                     "cpe:/o:wdc:my_cloud_ex2ultra_firmware",
                     "cpe:/o:wdc:my_cloud_ex2100_firmware",
                     "cpe:/o:wdc:my_cloud_ex4100_firmware",
                     "cpe:/o:wdc:my_cloud_dl2100_firmware",
                     "cpe:/o:wdc:my_cloud_dl4100_firmware",
                     "cpe:/o:wdc:my_cloud_pr2100_firmware",
                     "cpe:/o:wdc:my_cloud_pr4100_firmware");

if (!infos = get_app_version_from_list(cpe_list: cpe_list, nofork: TRUE, version_regex: "^[0-9]+\.[0-9]+\.[0-9]+")) # nb: The HTTP Detection is only able to extract the major release like 2.30
  exit(0);

version = infos["version"];

if (version_in_range(version: version, test_version: "5.0", test_version2: "5.14.105")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.15.106");
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);