Windows Modules Installer Elevation of Privilege Vulnerability (KB4565552)

# Copyright (C) 2020 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("1.3.6.1.4.1.25623.1.0.817243");
  script_version("2021-08-12T03:01:00+0000");
  script_cve_id("CVE-2020-1346");
  script_tag(name:"cvss_base", value:"4.6");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2021-08-12 03:01:00 +0000 (Thu, 12 Aug 2021)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/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:"2020-07-16 12:57:00 +0000 (Thu, 16 Jul 2020)");
  script_tag(name:"creation_date", value:"2020-07-16 16:02:42 +0530 (Thu, 16 Jul 2020)");
  script_name("Windows Modules Installer Elevation of Privilege Vulnerability (KB4565552)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4565552");

  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 Windows Modules Installer
  fails to properly handle file operations.

  Please see the references for more information on the vulnerabilities.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to gain elevated privileges.");

  script_tag(name:"affected", value:"- Microsoft Windows 10 Version 1803 for 32-bit Systems

  - Microsoft Windows 10 Version 1803 for x64-based Systems");

  script_tag(name:"solution", value:"The vendor has released updates. Please see
  the references for more information.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"executable_version");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/4565552");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/WindowsVersion");
  exit(0);
}

include("smb_nt.inc");
include("secpod_reg.inc");
include("version_func.inc");
include("secpod_smb_func.inc");

if(hotfix_check_sp(win10:1, win10x64:1) <= 0){
  exit(0);
}

dllPath = smb_get_system32root();
if(!dllPath ){
  exit(0);
}

fileVer = fetch_file_version(sysPath:dllPath, file_name:"Updateagent.dll");
if(!fileVer){
  exit(0);
}

if(version_in_range(version:fileVer, test_version:"10.0.17134.0", test_version2:"10.0.17134.1599"))
{
  report = report_fixed_ver(file_checked:dllPath + "\Updateagent.dll",
                            file_version:fileVer, vulnerable_range:"10.0.17134.0 - 10.0.17134.1599");
  security_message(data:report);
  exit(0);
}
exit(99);