Vulnerabilities > CVE-2018-8161 - Unspecified vulnerability in Microsoft products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#
include("compat.inc");

if (description)
{
  script_id(109617);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2018-8161");
  script_xref(name:"MSKB", value:"4018396");
  script_xref(name:"MSKB", value:"4018383");
  script_xref(name:"MSKB", value:"4022141");
  script_xref(name:"MSFT", value:"MS18-4018396");
  script_xref(name:"MSFT", value:"MS18-4018383");
  script_xref(name:"MSFT", value:"MS18-4022141");
  script_xref(name:"IAVA", value:"2018-A-0151");

  script_name(english:"Security Updates for Microsoft Word Products (May 2018)");
  script_summary(english:"Checks for Microsoft security updates.");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Products are missing a security update.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Products are missing a security update.
It is, therefore, affected by the following vulnerability :

  - A remote code execution vulnerability exists in
    Microsoft Office software when the software fails to
    properly handle objects in memory. An attacker who
    successfully exploited the vulnerability could 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.  (CVE-2018-8161)");
  # https://support.microsoft.com/en-us/help/4018396/description-of-the-security-update-for-word-2013-may-8-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b8806608");
  # https://support.microsoft.com/en-us/help/4018383/description-of-the-security-update-for-word-2016-may-8-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e84a2398");
  # https://support.microsoft.com/en-us/help/4022141/description-of-the-security-update-for-word-2010-may-8-2018
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?34b85429");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4018396
  -KB4018383
  -KB4022141");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-8161");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/05/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:word");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows : Microsoft Bulletins");

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("office_installed.nasl", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
  script_require_keys("SMB/MS_Bulletin_Checks/Possible");
  script_require_ports(139, 445, "Host/patch_management_checks");

  exit(0);
}

include("audit.inc");
include("smb_func.inc");
include("smb_hotfixes.inc");
include("smb_hotfixes_fcheck.inc");
include("smb_reg_query.inc");
include("misc_func.inc");
include("install_func.inc");

global_var vuln;

get_kb_item_or_exit("SMB/MS_Bulletin_Checks/Possible");

bulletin = "MS18-05";
kbs = make_list(
  '4022141', # Word 2010 SP2
  '4018396', # Word 2013 SP1
  '4018383'  # Word 2016
);

if (get_kb_item("Host/patch_management_checks")) hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_HOLE);

get_kb_item_or_exit("SMB/Registry/Enumerated", exit_code:1);

vuln = FALSE;
port = kb_smb_transport();

######################################################################
# Word 2010, 2013, 2016
######################################################################
function perform_word_checks()
{
  local_var word_checks, kb16;

  kb16 = "4018383";
  word_checks = make_array(
    "14.0", make_array("sp", 2, "version", "14.0.7208.5000", "kb", "4022141"),
    "15.0", make_array("sp", 1, "version", "15.0.5031.1000", "kb", "4018396"),
    "16.0", make_nested_list(
      make_array("sp", 0, "version", "16.0.4690.1000", "channel", "MSI", "kb", kb16),
      make_array("sp", 0, "version", "16.0.8431.2250", "channel", "Deferred", "channel_version", "1708", "kb", kb16),
      make_array("sp", 0, "version", "16.0.8201.2278", "channel", "Deferred", "kb", kb16),
      make_array("sp", 0, "version", "16.0.9126.2191", "channel", "First Release for Deferred", "kb", kb16),
      make_array("sp", 0, "version", "16.0.9226.2126", "channel", "Current", "kb", kb16)
    )
  );
  if (hotfix_check_office_product(product:"Word", checks:word_checks, bulletin:bulletin))
    vuln = TRUE;
}

######################################################################
# MAIN
######################################################################
perform_word_checks();

if (vuln)
{
  replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
  hotfix_security_hole();
  hotfix_check_fversion_end();
  exit(0);
}
else
{
  hotfix_check_fversion_end();
  audit(AUDIT_HOST_NOT, 'affected');
}