Microsoft Office 2016 Multiple RCE Vulnerabilities (KB4018294)

# Copyright (C) 2019 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("1.3.6.1.4.1.25623.1.0.814677");
  script_version("2021-09-06T11:01:35+0000");
  script_cve_id("CVE-2019-0671", "CVE-2019-0672", "CVE-2019-0673", "CVE-2019-0674",
                "CVE-2019-0582");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"last_modification", value:"2021-09-06 11:01:35 +0000 (Mon, 06 Sep 2021)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-08-24 17:37:00 +0000 (Mon, 24 Aug 2020)");
  script_tag(name:"creation_date", value:"2019-02-13 10:33:26 +0530 (Wed, 13 Feb 2019)");
  script_name("Microsoft Office 2016 Multiple RCE Vulnerabilities (KB4018294)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4018294");

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

  script_tag(name:"insight", value:"Multiple flaws exist due to:

  - Microsoft Office Access Connectivity Engine improperly handles
    objects in memory.

  - Windows Jet Database Engine improperly handles objects in memory.");

  script_tag(name:"impact", value:"Successful exploitation will allow an
  attacker to execute arbitrary code on a victim system.");

  script_tag(name:"affected", value:"Microsoft Office 2016.");

  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/4018294");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_office_products_version_900032.nasl");
  script_mandatory_keys("MS/Office/Ver");
  script_require_ports(139, 445);
  exit(0);
}


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

officeVer = get_kb_item("MS/Office/Ver");
if(!officeVer || officeVer !~ "^16\."){
  exit(0);
}

os_arch = get_kb_item("SMB/Windows/Arch");
if("x86" >< os_arch){
  key_list = make_list("SOFTWARE\Microsoft\Windows\CurrentVersion");
}
else if("x64" >< os_arch){
  key_list =  make_list("SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion",
                        "SOFTWARE\Microsoft\Windows\CurrentVersion");
}

foreach key(key_list)
{
  propath = registry_get_sz(key:key, item:"ProgramFilesDir");
  if(propath)
  {
    offPath = propath + "\Microsoft Office\root\VFS\ProgramFilesCommonX86\Microsoft Shared\Office16";
    offdllVer = fetch_file_version(sysPath:offPath, file_name:"acecore.dll");
    if(!offdllVer || offdllVer !~ "^16\."){
      exit(0);
    }

    if(version_is_less(version:offdllVer, test_version:"16.0.4810.1000"))
    {
      report = report_fixed_ver( file_checked:offPath + "\acecore.dll",
                                 file_version:offdllVer, vulnerable_range:"16.0 - 16.0.4810.0999");
      security_message(data:report);
     exit(0);
    }
  }
}
exit(0);