Security Updates for Microsoft Excel Products (February 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(133616);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/06/10");

  script_cve_id("CVE-2020-0759");
  script_xref(name:"MSKB", value:"4484256");
  script_xref(name:"MSKB", value:"4484265");
  script_xref(name:"MSKB", value:"4484267");
  script_xref(name:"MSFT", value:"MS20-4484256");
  script_xref(name:"MSFT", value:"MS20-4484265");
  script_xref(name:"MSFT", value:"MS20-4484267");

  script_name(english:"Security Updates for Microsoft Excel Products (February 2020)");

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

  - A remote code execution vulnerability exists in Microsoft Excel 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.");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484256");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484265");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4484267");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  - KB4484256
  - KB4484265
  - KB4484267

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-2020-0759");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/02/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:excel");
  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", "microsoft_office_compatibility_pack_installed.nbin", "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('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');

global_var vuln;

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-02';
kbs = make_list(
  '4484256',
  '4484265',
  '4484267'
);

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', '14.0.7245.5000', 'kb', '4484267'),
  '15.0', make_array('sp', 1, 'version', '15.0.5215.1000', 'kb', '4484265'),
  '16.0', make_nested_list(
    make_array('sp', 0, 'version', '16.0.4966.1000', 'channel', 'MSI', 'kb', '4484256'))
);

if (hotfix_check_office_product(product:'Excel', 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');
}