Microsoft Internet Explorer Multiple Vulnerabilities (KB4056568)

# 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

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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.812289");
  script_version("2023-07-20T05:05:17+0000");
  script_cve_id("CVE-2018-0762", "CVE-2018-0772", "CVE-2017-5753", "CVE-2017-5715",
                "CVE-2017-5754");
  script_tag(name:"cvss_base", value:"7.6");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/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:H/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:"2020-08-24 17:37:00 +0000 (Mon, 24 Aug 2020)");
  script_tag(name:"creation_date", value:"2018-01-04 13:38:43 +0530 (Thu, 04 Jan 2018)");
  script_tag(name:"qod_type", value:"executable_version");
  script_name("Microsoft Internet Explorer Multiple Vulnerabilities (KB4056568)");

  script_tag(name:"summary", value:"This host is missing a critical security
  update according to Microsoft security updates KB4056568");

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

  script_tag(name:"insight", value:"Multiple flaws exist due to:

  - A new publicly disclosed class of vulnerabilities referred to as
    'speculative execution side-channel attacks' that affect many modern
    processors and operating systems including Intel, AMD, and ARM.

  - Multiple errors exist in the way the scripting engine handles objects in
    memory in Microsoft browsers.");

  script_tag(name:"impact", value:"Successful exploitation will allow attacker
  to execute arbitrary code in the context of the current user, gain the same
  user rights as the current user, take control of an affected system and can
  read the content of memory therefore lead to information disclosure, conduct
  bounds check bypass, branch target injection and rogue data cache load, and
  some unspecified impacts too.");

  script_tag(name:"affected", value:"Microsoft Internet Explorer version 9.x, 10.x and 11.x.");

  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/4056568");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("gb_ms_ie_detect.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("MS/IE/Version");

  exit(0);
}

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

if(hotfix_check_sp(win2008:3, win2008x64:3, win7:2, win7x64:2, win2008r2:2, win2012:1,  win2012R2:1,
                   win8_1:1, win8_1x64:1) <= 0){
  exit(0);
}

ieVer = get_app_version(cpe:CPE);
if(!ieVer || ieVer !~ "^(9|1[01])\."){
  exit(0);
}

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

iedllVer = fetch_file_version(sysPath:iePath, file_name:"Mshtml.dll");
if(!iedllVer){
  exit(0);
}

if(hotfix_check_sp(win2008:3, win2008x64:3) > 0)
{
  if(version_is_less(version:iedllVer, test_version:"9.0.8112.21097")){
    Vulnerable_range = "Less than 9.0.8112.21097";
  }
}

else if(hotfix_check_sp(win2012:1) > 0)
{
  if(version_is_less(version:iedllVer, test_version:"10.0.9200.22332")){
    Vulnerable_range = "Less than 10.0.9200.22332";
  }
}

else if(hotfix_check_sp(win8_1:1, win8_1x64:1, win2012R2:1, win7:2, win7x64:2, win2008r2:2) > 0)
{
  if(version_is_less(version:iedllVer, test_version:"11.0.9600.18879")){
     Vulnerable_range = "Less than 11.0.9600.18879";
  }
}

if(Vulnerable_range)
{
  report = report_fixed_ver(file_checked:iePath + "\Mshtml.dll",
                            file_version:iedllVer, vulnerable_range:Vulnerable_range);
  security_message(data:report);
  exit(0);
}
exit(0);