Microsoft Office Word Viewer Remote Code Execution Vulnerability (KB3203427)

# 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("1.3.6.1.4.1.25623.1.0.810944");
  script_version("2026-04-28T06:28:06+0000");
  script_cve_id("CVE-2017-0283");
  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: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:"2017-06-14 12:38:50 +0530 (Wed, 14 Jun 2017)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft Office Word Viewer Remote Code Execution Vulnerability (KB3203427)");

  script_tag(name:"summary", value:"This host is missing a critical security
  update according to Microsoft KB3203427.");

  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 the way Windows Uniscribe
  handles objects in memory.");

  script_tag(name:"impact", value:"Successful exploitation will allow a remote
  attacker to 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. Users whose accounts are configured to have fewer user rights on the
  system could be less impacted than users who operate with administrative user
  rights.");

  script_tag(name:"affected", value:"Microsoft Word Viewer.");

  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/3203427");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/98920");
  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/WordView/Version");
  exit(0);
}


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

wordviewVer = get_kb_item("SMB/Office/WordView/Version");
if(!wordviewVer){
  exit(0);
}

wordviewPath = get_kb_item("SMB/Office/WordView/Install/Path");
if(!wordviewPath){
  wordviewPath = "Unable to fetch the install path";
}

offPath = registry_get_sz(key:"SOFTWARE\Microsoft\Windows\CurrentVersion",
                          item:"CommonFilesDir");
if(offPath)
{
  offPath += "\Microsoft Shared\OFFICE11";
  dllVer = fetch_file_version(sysPath:offPath, file_name:"usp10.dll");
  if(dllVer)
  {
    if(version_is_less(version:dllVer, test_version:"1.0626.6002.24099"))
    {
      report = 'File checked:     ' + offPath + "Usp10.dll" + '\n' +
               'File version:     ' + dllVer + '\n' +
               'Vulnerable range: Less than 1.0626.6002.24099 \n' ;
      security_message(data:report);
      exit(0);
    }
  }
}
exit(0);