Microsoft Office 2016 Multiple Remote Code Execution Vulnerabilities (KB4011574)

# SPDX-FileCopyrightText: 2018 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.812731");
  script_version("2023-07-20T05:05:17+0000");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_cve_id("CVE-2018-0798", "CVE-2018-0801", "CVE-2018-0802", "CVE-2018-0812",
                "CVE-2018-0804", "CVE-2018-0805", "CVE-2018-0806", "CVE-2018-0807",
                "CVE-2018-0845", "CVE-2018-0848", "CVE-2018-0849", "CVE-2018-0862");
  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:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/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:"2018-01-10 11:52:29 +0530 (Wed, 10 Jan 2018)");
  script_name("Microsoft Office 2016 Multiple Remote Code Execution Vulnerabilities (KB4011574)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4011574");

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

  script_tag(name:"insight", value:"Multiple flaws are due to microsoft office
  software fails to properly handle objects in memory.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to run arbitrary code in the context of the current user. If the current user
  is logged on with administrative user rights, an attacker could take control
  of the affected system. An attacker could then:

  - install programs

  - view, change, or delete data

  - create new accounts with full user rights.");

  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/4011574");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  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)
  exit(0);

if(officeVer =~ "^16\.") {
  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\EQUATION";
      msdllVer = fetch_file_version(sysPath:offPath, file_name:"eqnedt32.exe");
      if(!msdllVer) {
        exit(0);
      } else {
        report = report_fixed_ver(file_checked:offPath + "\eqnedt32.exe",
                                  file_version:msdllVer, vulnerable_range:"File 'eqnedt32.exe' is present");
        security_message(data:report);
        exit(0);
      }
    }
  }
  exit(99);
}

exit(0);