Lucene search

K
nessusThis script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.SMB_NT_MS20_DEC_EXCEL.NASL
HistoryDec 08, 2020 - 12:00 a.m.

Security Updates for Microsoft Excel Products (December 2020)

2020-12-0800:00:00
This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
45

7.3 High

AI Score

Confidence

High

The Microsoft Excel Products are missing security updates.
It is, therefore, affected by multiple vulnerabilities:

  • A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2020-17123, CVE-2020-17125, CVE-2020-17127, CVE-2020-17128, CVE-2020-17129)

  • An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2020-17126)

  • A security feature bypass vulnerability exists. An attacker can exploit this and bypass the security feature and perform unauthorized actions compromising the integrity of the system/application.
    (CVE-2020-17130)

#
# (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(143564);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/06");

  script_cve_id(
    "CVE-2020-17123",
    "CVE-2020-17125",
    "CVE-2020-17126",
    "CVE-2020-17127",
    "CVE-2020-17128",
    "CVE-2020-17129",
    "CVE-2020-17130"
  );
  script_xref(name:"MSKB", value:"4493148");
  script_xref(name:"MSKB", value:"4493139");
  script_xref(name:"MSKB", value:"4486754");
  script_xref(name:"MSFT", value:"MS20-4493148");
  script_xref(name:"MSFT", value:"MS20-4493139");
  script_xref(name:"MSFT", value:"MS20-4486754");
  script_xref(name:"IAVA", value:"2020-A-0556-S");
  script_xref(name:"IAVA", value:"2021-A-0017-S");
  script_xref(name:"CEA-ID", value:"CEA-2020-0138");

  script_name(english:"Security Updates for Microsoft Excel Products (December 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 security updates.
It is, therefore, affected by multiple vulnerabilities:

  - A remote code execution vulnerability. An attacker can
    exploit this to bypass authentication and execute
    unauthorized arbitrary commands. (CVE-2020-17123,
    CVE-2020-17125, CVE-2020-17127, CVE-2020-17128,
    CVE-2020-17129)

  - An information disclosure vulnerability. An attacker can
    exploit this to disclose potentially sensitive
    information. (CVE-2020-17126)

  - A security feature bypass vulnerability exists. An
    attacker can exploit this and bypass the security
    feature and perform unauthorized actions compromising
    the integrity of the system/application.
    (CVE-2020-17130)");
  # https://support.microsoft.com/en-us/help/4493148/security-update-for-excel-2010-december-8-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?68d763c5");
  # https://support.microsoft.com/en-us/help/4486754/security-update-for-excel-2016-december-8-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?64d44384");
  # https://support.microsoft.com/en-us/help/4493139/security-update-for-excel-2013-december-8-2020
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7ded81b7");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB4493148
  -KB4486754
  -KB4493139

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: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-2020-17129");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/12/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/08");

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

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

  script_copyright(english:"This script is Copyright (C) 2020-2024 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');
include('install_func.inc');

get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');

bulletin = 'MS20-12';

kbs = make_list(
  'kb4493148', //14
  'kb4493139', //15
  'kb4486754' //16
);

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', '14.0.7263.5000', 'kb', '4493148'),
  '15.0', make_array('sp', 1, 'version', '15.0.5301.1000', 'kb', '4493139'),
  '16.0', make_nested_list(make_array('sp', 0, 'version', '16.0.5095.1000', 'channel', 'MSI', 'kb', '4486754')
  )
);

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');
}
VendorProductVersion
microsoftexcel

7.3 High

AI Score

Confidence

High