Microsoft Windows Server Version 20H2 Unsupported Version Detection

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include("compat.inc");

if (description)
{
  script_id(164073);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/08/11");

  script_name(english:"Microsoft Windows Server Version 20H2 Unsupported Version Detection");

  script_set_attribute(attribute:"synopsis", value:"
The remote operating system is no longer supported.");
  script_set_attribute(attribute:"description", value:
"Microsoft Windows Server version 20H2 is running on the remote host.
Microsoft ended support for Windows Server version 20H2 on August 9, 2022.

Lack of support implies that no new security patches for the product
will be released by the vendor. As a result, it is likely to contain
security vulnerabilities. Furthermore, Microsoft is unlikely to
investigate or acknowledge reports of vulnerabilities.");
  # https://docs.microsoft.com/en-us/windows-server/get-started/windows-server-release-info
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e6631f3d");
  # https://docs.microsoft.com/en-us/lifecycle/products/windows-server
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e760eea1");
  
  script_set_attribute(attribute:"solution", value:
"Upgrade to a version of Microsoft Windows that is currently supported.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"manual");
  script_set_attribute(attribute:"cvss_score_rationale", value:"Tenable score for unsupported products.");

  script_set_attribute(attribute:"plugin_publication_date", value:"2022/08/11");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
  script_set_attribute(attribute:"unsupported_by_vendor", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("smb_reg_service_pack.nasl");
  script_exclude_keys("SMB/not_windows");
  script_require_ports("SMB/WindowsVersion", "SMB/WindowsVersionBuild", "SMB/ProductName");

  exit(0);
}

if (get_kb_item('SMB/not_windows')) audit(AUDIT_OS_NOT, 'Windows');

var product_name  = 'Windows Server version 20H2';
var tag           = 'microsoft:windows_server';
var cpe_ver       = '20h2';

var os       = get_kb_item_or_exit('SMB/WindowsVersion');
var os_build = get_kb_item_or_exit('SMB/WindowsVersionBuild');
var os_name  = get_kb_item_or_exit('SMB/ProductName');

var port = get_kb_item('SMB/transport');

# No OS
if (!os) audit(AUDIT_HOST_NOT, 'running an OS known to this plugin');

# Not Windows Server
if ('10' >!< os || 'Windows 10' >< os_name) audit(AUDIT_OS_NOT, product_name);

# Not Build 19042 (version 20H2)
if ('19042' != os_build) audit(AUDIT_OS_NOT, product_name);

register_unsupported_product(
  product_name  : product_name,
  is_custom_cpe : TRUE,
  cpe_class     : CPE_CLASS_OS,
  cpe_base      : tag,
  version       : cpe_ver
);

security_report_v4(port:port, severity:SECURITY_HOLE);