Microsoft Windows Secure Kernel Mode Information Disclosure Vulnerability (3170050)

# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.807347");
  script_version("2026-04-28T06:28:06+0000");
  script_cve_id("CVE-2016-3256");
  script_tag(name:"cvss_base", value:"2.1");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:N/A:N");
  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:L/UI:R/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-10-12 22:12:00 +0000 (Fri, 12 Oct 2018)");
  script_tag(name:"creation_date", value:"2016-07-13 08:34:49 +0530 (Wed, 13 Jul 2016)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft Windows Secure Kernel Mode Information Disclosure Vulnerability (3170050)");

  script_tag(name:"summary", value:"This host is missing an important security
  update according to Microsoft Bulletin MS16-089.");

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

  script_tag(name:"insight", value:"An information disclosure flaw exists when
  Windows Secure Kernel Mode improperly handles objects in memory.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to read sensitive information on the target system.");

  script_tag(name:"affected", value:"- Microsoft Windows 10 x32/x64

  - Microsoft Windows 10 Version 1511 x32/x64");

  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/kb/3163912");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/91590");
  script_xref(name:"URL", value:"https://support.microsoft.com/en-us/kb/3172985");
  script_xref(name:"URL", value:"https://technet.microsoft.com/library/security/MS16-089");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("smb_reg_service_pack.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("SMB/WindowsVersion");
  script_xref(name:"URL", value:"https://technet.microsoft.com/en-us/library/security/MS16-089");

  exit(0);
}

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

if(hotfix_check_sp(win10:1, win10x64:1) <= 0){
  exit(0);
}

sysPath = smb_get_system32root();
if(!sysPath ){
  exit(0);
}

sysVer = fetch_file_version(sysPath:sysPath, file_name:"edgehtml.dll");
if(!sysVer){
  exit(0);
}

if(hotfix_check_sp(win10:1, win10x64:1) > 0)
{
  if(version_is_less(version:sysVer, test_version:"11.0.10240.17024"))
  {
    Vulnerable_range = "Less than 11.0.10240.17024";
    VULN = TRUE ;
  }
  else if(version_in_range(version:sysVer, test_version:"11.0.10586.0", test_version2:"11.0.10586.493"))  {
    Vulnerable_range = "11.0.10586.0 - 11.0.10586.493";
    VULN = TRUE ;
  }
}

if(VULN)
{
  report = 'File checked:     ' + sysPath + "\edgehtml.dll" + '\n' +
           'File version:     ' + sysVer  + '\n' +
           'Vulnerable range: ' + Vulnerable_range + '\n' ;
  security_message(data:report);
  exit(0);
}
exit(0);