Microsoft Office Compatibility Pack Remote Code Execution Vulnerability (KB3191835)

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.811024");
  script_version("2026-04-28T06:28:06+0000");
  script_cve_id("CVE-2017-0254");
  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:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  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:"2017-07-08 01:29:00 +0000 (Sat, 08 Jul 2017)");
  script_tag(name:"creation_date", value:"2017-05-10 09:00:39 +0530 (Wed, 10 May 2017)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft Office Compatibility Pack Remote Code Execution Vulnerability (KB3191835)");

  script_tag(name:"summary", value:"This host is missing an important security
  update for Microsoft Office Compatibility Pack according to Microsoft KB3191835.");

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

  script_tag(name:"insight", value:"The flaw exists as the 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, or create new accounts with full user rights.");

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

  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_xref(name:"URL", value:"https://support.microsoft.com/en-us/help/3191835");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/98101");
  script_xref(name:"URL", value:"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0254");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("secpod_office_products_version_900032.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/Office/ComptPack/Version", "SMB/Office/WordCnv/Version");

  exit(0);
}

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

path = registry_get_sz(key:"SOFTWARE\Microsoft\Windows\CurrentVersion", item:"ProgramFilesDir");
if(!path){
  exit(0);
}

cmpPckVer = get_kb_item("SMB/Office/ComptPack/Version");
if(cmpPckVer && cmpPckVer =~ "^12\.")
{
  wordcnvVer = get_kb_item("SMB/Office/WordCnv/Version");
  if(wordcnvVer && wordcnvVer =~ "^12\.")
  {
    offpath = path + "\Microsoft Office\Office12";
    {
      sysVer = fetch_file_version(sysPath:offpath, file_name:"Wordcnv.dll");
      if(sysVer && sysVer =~ "^12\.")
      {
        if(version_in_range(version:sysVer, test_version:"12.0", test_version2:"12.0.6768.4999"))
        {
          report = 'File checked:      ' + offpath + "\Wordcnv.dll" + '\n' +
                   'File version:      ' + sysVer  + '\n' +
                   'Vulnerable range:  12.0 - 12.0.6768.4999' + '\n' ;
          security_message(data:report);
          exit(0);
        }
      }
    }
  }
}