Microsoft PowerPoint 2016 Remote Code Execution Vulnerability (KB4461434)

# 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("1.3.6.1.4.1.25623.1.0.814245");
  script_version("2023-07-20T05:05:17+0000");
  script_cve_id("CVE-2018-8501");
  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:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
  script_tag(name:"creation_date", value:"2018-10-10 09:30:14 +0530 (Wed, 10 Oct 2018)");
  script_name("Microsoft PowerPoint 2016 Remote Code Execution Vulnerability (KB4461434)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB4461434.");

  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 an error in the Microsoft
  PowerPoint because it fails to properly handle objects in Protected View.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker who
  successfully exploited the vulnerability to run arbitrary code in the context of the
  current user.");

  script_tag(name:"affected", value:"Microsoft PowerPoint 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/4461434");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/105497");
  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("SMB/Office/PowerPnt/Version", "SMB/Windows/Arch");
  script_require_ports(139, 445);

  exit(0);
}

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

pwrPntVer = get_kb_item("SMB/Office/PowerPnt/Version");
if(pwrPntVer && pwrPntVer =~ "^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)
  {
    msPath = registry_get_sz(key:key, item:"ProgramFilesDir");
    if(msPath)
    {
      offPath = msPath + "\Microsoft Office\root\OFFICE16" ;
      exeVer  = fetch_file_version(sysPath:offPath, file_name:"ppcore.dll");
      if(!exeVer){
        continue;
      }
      if(exeVer && exeVer =~ "^16\." && version_is_less(version:exeVer, test_version:"16.0.4756.1000"))
      {
        report = report_fixed_ver(file_checked:offPath + "\ppcore.dll",
                                  file_version:exeVer, vulnerable_range:"16.0 - 16.0.4756.999");
        security_message(data:report);
        exit(0);
      }
    }
  }
}