Security Updates for Microsoft Word Products (April 2020)

#
# (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(135482);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/06/10");

  script_cve_id("CVE-2020-0760", "CVE-2020-0980");
  script_xref(name:"MSKB", value:"4484300");
  script_xref(name:"MSKB", value:"4484319");
  script_xref(name:"MSKB", value:"4484295");
  script_xref(name:"MSFT", value:"MS20-4484300");
  script_xref(name:"MSFT", value:"MS20-4484319");
  script_xref(name:"MSFT", value:"MS20-4484295");
  script_xref(name:"IAVA", value:"2020-A-0149-S");

  script_name(english:"Security Updates for Microsoft Word Products (April 2020)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Word Products are affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Word Products are missing security updates. It
is, therefore, affected by multiple vulnerabilities :

  - A remote code execution vulnerability exists when
    Microsoft Office improperly loads arbitrary type
    libraries. 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.  (CVE-2020-0760)

  - A remote code execution vulnerability exists in
    Microsoft Word software when it fails to properly handle
    objects in memory. An attacker who successfully
    exploited the vulnerability could use a specially
    crafted file to perform actions in the security context
    of the current user. For example, the file could then
    take actions on behalf of the logged-on user with the
    same permissions as the current user.  (CVE-2020-0980)");
  # https://support.microsoft.com/en-us/help/4484300/security-update-for-word-2016-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3f9c0624");
  # https://support.microsoft.com/en-us/help/4484319/security-update-for-word-2013-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9de3bc71");
  # https://support.microsoft.com/en-us/help/4484295/security-update-for-word-2010-april-14-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?88f16861");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4484300
  -KB4484319
  -KB4484295

For Office 365, Office 2016 C2R, or Office 2019, ensure automatic
updates are enabled or open any office app and manually perform an
update.");
  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:N/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-2020-0980");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2020-0760");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14");

  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) 2020-2022 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('install_func.inc');

global_var vuln;

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-04';
kbs = make_list(
  '4484300',
  '4484319',
  '4484295'
);

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);
port = kb_smb_transport();

checks = make_array(
  '14.0', make_array('sp', 2, 'version', '14.0.7248.5000', 'kb', '4484295'),
  '15.0', make_array('sp', 1, 'version', '15.0.5233.1000', 'kb', '4484319'),
  '16.0', make_nested_list(
    make_array('sp', 0, 'version', '16.0.4993.1001', 'channel', 'MSI', 'kb', '4484300'))
  );

if (hotfix_check_office_product(product:'Word', checks:checks, bulletin:bulletin))
{
  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');
}