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
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
AI Score
Confidence
High
EPSS
Percentile
93.3%
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'
);
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
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
AI Score
Confidence
High
EPSS
Percentile
93.3%