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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.MACOS_MS21_NOV_OFFICE.NASL
HistoryNov 17, 2021 - 12:00 a.m.

Security Updates for Microsoft Office (November 2021) (macOS)

2021-11-1700:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
42

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

8.2 High

AI Score

Confidence

High

0.034 Low

EPSS

Percentile

91.5%

The Microsoft Office product installed on the remote host is affected by multiple vulnerabilities, as follows:

  • A remote code execution vulnerability in Excel that can be exploited by an unauthenticated, local attacker. (CVE-2021-40442)

  • A security feature bypass vulnerability in Excel that can be exploited by an unauthenticated, local attacker. (CVE-2021-42292)

Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.

#%NASL_MIN_LEVEL 70300
##
# (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('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(155448);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/01");

  script_cve_id("CVE-2021-40442", "CVE-2021-42292");
  script_xref(name:"IAVA", value:"2021-A-0546-S");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2021/12/01");
  script_xref(name:"IAVA", value:"2021-A-0541-S");

  script_name(english:"Security Updates for Microsoft Office (November 2021) (macOS)");

  script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office product installed on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The Microsoft Office product installed on the remote host is affected by multiple vulnerabilities, as follows:

  - A remote code execution vulnerability in Excel that can be exploited by an unauthenticated, local
    attacker. (CVE-2021-40442)

  - A security feature bypass vulnerability in Excel that can be exploited by an unauthenticated, local
    attacker. (CVE-2021-42292)

  
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  # https://docs.microsoft.com/en-us/officeupdates/update-history-office-for-mac
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?43ed1b90");
  # https://docs.microsoft.com/en-us/officeupdates/release-notes-office-for-mac#november-16-2021
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?945bbaf2");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released a set of patches for Microsoft Office for Mac.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-42292");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/11/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/11/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
  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:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("macosx_office_installed.nbin");
  script_require_keys("Host/MacOSX/Version", "installed_sw/Microsoft Excel");

  exit(0);
}

include('vcf.inc');

var os = get_kb_item_or_exit('Host/MacOSX/Version');
var apps = make_list('Microsoft Excel');
var report = '';

#2019
var min_ver_19 = '16.17.0';
var fix_ver_19 = '16.55';
var fix_disp_19 = '16.55 (21111400)';

foreach var app (apps)
{
  var installs = get_installs(app_name:app);
  if (isnull(installs[1]))
    continue;

  foreach var install (installs[1])
  {
    var version = install['version'];

    if (ver_compare(ver:version, minver:min_ver_19, fix:fix_ver_19, strict:FALSE) < 0)
    {
      var app_label = app + ' for Mac 2019';
      report +=
        '\n\n  Product           : ' + app_label +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fix_disp_19;
    }
  }
}
if (empty(report))
  audit(AUDIT_HOST_NOT, 'affected');

if (os =~ "^Mac OS X 10\.([0-9]([^0-9]|$)|1[0-4])")
  report += '\n  Note              : Update will require macOS 10.15.0 or later.\n';

security_report_v4(severity:SECURITY_WARNING, port:0, extra:report);
VendorProductVersionCPE
microsoftofficecpe:/a:microsoft:office
microsoftexcelcpe:/a:microsoft:excel

6.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

8.2 High

AI Score

Confidence

High

0.034 Low

EPSS

Percentile

91.5%