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
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
85.9%
The Microsoft Office 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-2021-28455, CVE-2021-31175, CVE-2021-31176, CVE-2021-31177, CVE-2021-31179, CVE-2021-31180)
An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-31174, CVE-2021-31178)
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(162095);
script_version("1.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/20");
script_cve_id(
"CVE-2021-28455",
"CVE-2021-31174",
"CVE-2021-31175",
"CVE-2021-31176",
"CVE-2021-31178",
"CVE-2021-31179",
"CVE-2021-31180"
);
script_xref(name:"IAVA", value:"2021-A-0225-S");
script_name(english:"Security Updates for Microsoft Office Products C2R (May 2021)");
script_set_attribute(attribute:"synopsis", value:
"The Microsoft Office Products are affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The Microsoft Office 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-2021-28455, CVE-2021-31175, CVE-2021-31176, CVE-2021-31177,
CVE-2021-31179, CVE-2021-31180)
- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive
information. (CVE-2021-31174, CVE-2021-31178)
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-microsoft365-apps-by-date
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fd4508ff");
script_set_attribute(attribute:"solution", value:
"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:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-31180");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-28455");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/11");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/11");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/10");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:office");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("office_installed.nasl", "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 = 'MS21-05';
var app_info = vcf::microsoft::office::get_app_info(app:'Microsoft Office');
var constraints = [
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.13127.21624','channel': 'Deferred','channel_version': '2008'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.12527.21912','channel': 'Microsoft 365 Apps on Windows 7'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.12527.21912','channel': 'Deferred'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.13901.20516','channel': 'Enterprise Deferred','channel_version': '2103'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.13801.20638','channel': 'Enterprise Deferred'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.13801.20638','channel': 'First Release for Deferred'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.13929.20372','channel': '2016 Retail'},
{'product':'Microsoft Office 2016','file':'graph.exe','fixed_version':'16.0.13929.20372','channel': 'Current'},
{'product':'Microsoft Office 2019','file':'graph.exe','fixed_version':'16.0.13929.20372','channel': '2019 Retail'},
{'product':'Microsoft Office 2019','file':'graph.exe','fixed_version':'16.0.10374.20040','channel': '2019 Volume'}
];
vcf::microsoft::office::check_version_and_report(
app_info:app_info,
constraints:constraints,
severity:SECURITY_WARNING,
bulletin:bulletin,
subproduct:'Office'
);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28455
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31174
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31175
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31176
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31178
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31179
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31180
www.nessus.org/u?fd4508ff
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
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
85.9%