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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.SMB_NT_MS21_NOV_EXCEL.NASL
HistoryNov 09, 2021 - 12:00 a.m.

Security Updates for Microsoft Excel Products (November 2021)

2021-11-0900:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
118

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

8.3 High

AI Score

Confidence

High

0.034 Low

EPSS

Percentile

91.5%

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

  • 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-2021-42292)

  • A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-40442)

#%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(154982);
  script_version("1.11");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/01");

  script_cve_id("CVE-2021-40442", "CVE-2021-42292");
  script_xref(name:"MSKB", value:"5002056");
  script_xref(name:"MSKB", value:"5002072");
  script_xref(name:"MSFT", value:"MS21-5002056");
  script_xref(name:"MSFT", value:"MS21-5002072");
  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 Excel Products (November 2021)");

  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 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-2021-42292)

  - A remote code execution vulnerability. An attacker can
    exploit this to bypass authentication and execute
    unauthorized arbitrary commands. (CVE-2021-40442)");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/5002056");
  script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/5002072");
  script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:  
  -KB5002056
  -KB5002072");
  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:"2021/11/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/09");

  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) 2021-2024 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('vcf_extras_office.inc');

var bulletin = 'MS21-11';
var kbs = make_list(
  '5002072',
  '5002056'
);

var constraints = [
  { 'kb':'5002072',  'fixed_version': '15.0.5397.1001', 'sp' : 1},
  { 'kb':'5002056', 'channel':'MSI', 'fixed_version': '16.0.5239.1001', 'sp' : 0}
];

vcf::microsoft::office_product::check_version_and_report(
  kbs:kbs,
  constraints:constraints,
  severity:SECURITY_WARNING,
  bulletin:bulletin,
  subproduct:'Excel'
);

VendorProductVersionCPE
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

8.3 High

AI Score

Confidence

High

0.034 Low

EPSS

Percentile

91.5%