QNAP QTS Multiple Samba Vulnerabilities (QSA-22-03)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.0.117980");
  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:"2022-02-17 11:26:14 +0000 (Thu, 17 Feb 2022)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-02-23 15:47:00 +0000 (Wed, 23 Feb 2022)");

  script_cve_id("CVE-2021-44141", "CVE-2021-44142", "CVE-2022-0336");

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

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

  script_name("QNAP QTS Multiple Samba Vulnerabilities (QSA-22-03)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("General");
  script_dependencies("gb_qnap_nas_http_detect.nasl");
  script_mandatory_keys("qnap/nas/qts/detected");

  script_tag(name:"summary", value:"QNAP QTS is prone to multiple vulnerabilities in Samba.");

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

  script_tag(name:"insight", value:"The following flaws exist:

  - CVE-2021-44141: Information leak via symlinks of existence of files or directories outside of
  the exported share

  - CVE-2021-44142: Out-of-bounds heap read/write vulnerability in VFS module vfs_fruit allows code
  execution

  - CVE-2022-0336: Samba AD users with permission to write to an account can impersonate arbitrary
  services");

  script_tag(name:"affected", value:"QNAP QTS versions 4.3.x, 4.4.x, 4.5.x and 5.0.0. QTS 4.2.6 and
  prior is not affected.");

  script_tag(name:"solution", value:"Update to version 4.3.3.1945 build 20220303, 4.3.4.1976 build
  20220303, 4.3.6.1965 build 20220302, 4.5.4.1931 build 20220128, 5.0.0.1932 build 20220129 or
  later.

  The following mitigation steps are provided by the vendor:

  - Disable SMB 1

  - Deny guest access to all shared folders");

  script_xref(name:"URL", value:"https://www.qnap.com/en/security-advisory/QSA-22-03");
  script_xref(name:"URL", value:"https://www.qnap.com/en/release-notes/qts/5.0.0.1932/20220129");
  script_xref(name:"URL", value:"https://www.qnap.com/en/release-notes/qts/4.5.4.1931/20220128");
  script_xref(name:"URL", value:"https://www.qnap.com/en/release-notes/qts/4.3.6.1965/20220302");
  script_xref(name:"URL", value:"https://www.qnap.com/en/release-notes/qts/4.3.4.1976/20220303");
  script_xref(name:"URL", value:"https://www.qnap.com/en/release-notes/qts/4.3.3.1945/20220303");
  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2021-44141.html");
  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2021-44142.html");
  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2022-0336.html");

  exit(0);
}

include("host_details.inc");
include("version_func.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: "4.3.3.1945")) {
  report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.3.1945", fixed_build: "20220303");
  security_message(port: 0, data: report);
  exit(0);
}

if (version_is_equal(version: version, test_version: "4.3.3.1945") &&
   (!build || version_is_less(version: build, test_version: "20220303"))) {
  report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.3.1945", fixed_build: "20220303");
  security_message(port: 0, data: report);
  exit(0);
}

if ( version =~ "^4\.3\.4" ) {
  if (version_is_less(version: version, test_version: "4.3.4.1976")) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.4.1976", fixed_build: "20220303");
    security_message(port: 0, data: report);
    exit(0);
  }

  if (version_is_equal(version: version, test_version: "4.3.4.1976") &&
     (!build || version_is_less(version: build, test_version: "20220303"))) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.4.1976", fixed_build: "20220303");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if ( version =~ "^4\.3\.[56]" ) {
  if (version_is_less(version: version, test_version: "4.3.6.1965")) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.6.1965", fixed_build: "20220302");
    security_message(port: 0, data: report);
    exit(0);
  }

  if (version_is_equal(version: version, test_version: "4.3.6.1965") &&
     (!build || version_is_less(version: build, test_version: "20220302"))) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.3.6.1965", fixed_build: "20220302");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if ( version =~ "^4\.[45]" ) {
  if (version_is_less(version: version, test_version: "4.5.4.1931")) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.5.4.1931", fixed_build: "20220128");
    security_message(port: 0, data: report);
    exit(0);
  }

  if (version_is_equal(version: version, test_version: "4.5.4.1931") &&
     (!build || version_is_less(version: build, test_version: "20220128"))) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "4.5.4.1931", fixed_build: "20220128");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if ( version =~ "^5" ) {
  if (version_is_less(version: version, test_version: "5.0.0.1932")) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "5.0.0.1932", fixed_build: "20220129");
    security_message(port: 0, data: report);
    exit(0);
  }

  if (version_is_equal(version: version, test_version: "5.0.0.1932") &&
     (!build || version_is_less(version: build, test_version: "20220129"))) {
    report = report_fixed_ver(installed_version: version, installed_build: build, fixed_version: "5.0.0.1932", fixed_build: "20220129");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);