Microsoft SharePoint Enterprise Server Remote Code Execution Vulnerability (KB3203430)

# 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

CPE = "cpe:/a:microsoft:sharepoint_server";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.810945");
  script_version("2026-04-28T06:28:06+0000");
  script_cve_id("CVE-2017-8509");
  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:"2017-06-15 16:33:51 +0530 (Thu, 15 Jun 2017)");
  script_name("Microsoft SharePoint Enterprise Server Remote Code Execution Vulnerability (KB3203430)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft KB3203430.");

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

  script_tag(name:"insight", value:"The flaw is due to an error in the Microsoft
  Office software when it fails to properly handle objects in memory.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  who successfully exploited the vulnerability to use a specially crafted file and
  perform actions in the security context of the current user.");

  script_tag(name:"affected", value:"Microsoft SharePoint Enterprise Server 2013 service Pack 1.");

  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/3203430");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/98812");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("gb_microsoft_sharepoint_smb_login_detect.nasl");
  script_mandatory_keys("microsoft/sharepoint/server/smb-login/detected");
  script_require_ports(139, 445);
  exit(0);
}

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

if(isnull(port = get_app_port(cpe:CPE, service:"smb-login")))
  exit(0);

if(!infos = get_app_version_and_location(cpe:CPE, port:port, exit_no_version:TRUE))
  exit(0);

shareVer = infos["version"];
if(!shareVer || shareVer !~ "^15\."){
  exit(0);
}

path = registry_get_sz(key:"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Office15.OSERVER",
                         item:"InstallLocation");
if(path)
{
  path = path + "\15.0\WebServices\ConversionServices";

  dllVer = fetch_file_version(sysPath:path, file_name:"microsoft.office.server.native.dll");
  if(dllVer && dllVer =~ "^15\.")
  {
    if(version_is_less(version:dllVer, test_version:"15.0.4919.1000"))
    {
      report = 'File checked:     ' +  path + "\microsoft.office.server.native.dll"+ '\n' +
               'File version:     ' +  dllVer  + '\n' +
               'Vulnerable range: ' +  "15.0 - 15.0.4919.0999" + '\n' ;
      security_message(port:port, data:report);
      exit(0);
    }
  }
}

exit(99);