QNAP QTS VPNFilter Malware (NAS-201805-24)

# SPDX-FileCopyrightText: 2018 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

CPE = "cpe:/o:qnap:qts";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.813522");
  script_version("2023-09-27T05:05:31+0000");
  script_tag(name:"last_modification", value:"2023-09-27 05:05:31 +0000 (Wed, 27 Sep 2023)");
  script_tag(name:"creation_date", value:"2018-06-26 13:09:22 +0530 (Tue, 26 Jun 2018)");
  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:"qod_type", value:"remote_banner");

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

  script_name("QNAP QTS VPNFilter Malware (NAS-201805-24)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_qnap_nas_http_detect.nasl");
  script_mandatory_keys("qnap/nas/qts/detected");

  script_tag(name:"summary", value:"QNAP QTS might be affected against the VPNFilter malware.");

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

  script_tag(name:"insight", value:"The flaw exists due to QNAP NAS unable to sanitize itself from
  the malware.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote attackers to steal
  information and remotely damage infected devices.");

  script_tag(name:"affected", value:"QNAP QTS versions through 4.2.6 build 20170628 and
  4.3.3.x through 4.3.3 build 20170703.");

  script_tag(name:"solution", value:"Update to version 4.2.6 build 20170729,
  4.3.3 build 20170727 or later.");

  script_xref(name:"URL", value:"https://www.qnap.com/en/security-advisory/nas-201805-24");

  exit(0);
}

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

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

build = get_kb_item("qnap/nas/qts/build");

if (version_is_less(version: version, test_version: "4.2.6")) {
  report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.2.6", fixed_build: "20170729");
  security_message(port: 0, data: report);
  exit(0);
}

if (version_is_equal(version: version, test_version: "4.2.6") &&
   (!build || version_is_less(version: build, test_version: "20170729"))) {
  report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.2.6", fixed_build: "20170729");
  security_message(port: 0, data: report);
  exit(0);
}

if (version =~ "^4\.3") {
  if (version_is_less(version: version, test_version: "4.3.3")) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.3", fixed_build: "20170727");
    security_message(port: 0, data: report);
    exit(0);
  }

  if (version_is_equal(version: version, test_version: "4.3.3") &&
     (!build || version_is_less(version: build, test_version: "20170727"))) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.3", fixed_build: "20170727");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);