Microsoft Office Compatibility Pack Service Pack 3 Security Feature Bypass Vulnerability (KB4461607)

# 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("1.3.6.1.4.1.25623.1.0.814674");
  script_version("2021-09-06T12:01:32+0000");
  script_cve_id("CVE-2019-0669");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2021-09-06 12:01:32 +0000 (Mon, 06 Sep 2021)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N");
  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 09:54:03 +0530 (Wed, 13 Feb 2019)");
  script_name("Microsoft Office Compatibility Pack Service Pack 3 Security Feature Bypass Vulnerability (KB4461607)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4461607");

  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 Microsoft Excel
  improperly discloses the contents of its memory.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to craft a special document file and then convince the user to open it and
  compromise the user's computer or data.");

  script_tag(name:"affected", value:"Microsoft Office Compatibility Pack Service Pack 3.");

  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/4461607");
  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("SMB/Office/ComptPack/Version");
  script_require_ports(139, 445);
  exit(0);
}

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

cmpPckVer = get_kb_item("SMB/Office/ComptPack/Version");
if(cmpPckVer && cmpPckVer =~ "^12\.")
{
  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)
  {
    msPath = registry_get_sz(key:key, item:"ProgramFilesDir");
    if(msPath)
    {
      xlcnvVer = get_kb_item("SMB/Office/XLCnv/Version");
      if(xlcnvVer && xlcnvVer =~ "^12\.")
      {
        offpath = msPath + "\Microsoft Office\Office12";
        sysVer = fetch_file_version(sysPath:offpath, file_name:"excelcnv.exe");
        if(sysVer && sysVer =~ "^12\." && version_in_range(version:sysVer, test_version:"12.0", test_version2:"12.0.6807.4999"))
        {
          report = report_fixed_ver(file_checked:offpath + "\excelcnv.exe",
                                    file_version:sysVer, vulnerable_range:"12.0 - 12.0.6807.4999");
          security_message(data:report);
          exit(0);
        }
      }
    }
  }
}
exit(0);