CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
93.6%
The Microsoft Excel Products are missing security updates.
It is, therefore, affected by multiple vulnerabilities :
A remote code execution vulnerability exists when Microsoft Office improperly loads arbitrary type libraries. An attacker could then install programs;
view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0760)
A remote code execution vulnerability exists in Microsoft Excel software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. (CVE-2020-0906)
#
# (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(135474);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/19");
script_cve_id("CVE-2020-0760", "CVE-2020-0906", "CVE-2020-0979");
script_xref(name:"MSKB", value:"4484283");
script_xref(name:"MSKB", value:"4484273");
script_xref(name:"MSKB", value:"4484285");
script_xref(name:"MSFT", value:"MS20-4484283");
script_xref(name:"MSFT", value:"MS20-4484273");
script_xref(name:"MSFT", value:"MS20-4484285");
script_xref(name:"IAVA", value:"2020-A-0144-S");
script_name(english:"Security Updates for Microsoft Excel Products (April 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 exists when
Microsoft Office improperly loads arbitrary type
libraries. An attacker could then install programs;
view, change, or delete data; or create new accounts
with full user rights. Users whose accounts are
configured to have fewer user rights on the system could
be less impacted than users who operate with
administrative user rights. (CVE-2020-0760)
- A remote code execution vulnerability exists in
Microsoft Excel software when the software fails to
properly handle objects in memory. An attacker who
successfully exploited the vulnerability could run
arbitrary code in the context of the current user. If
the current user is logged on with administrative user
rights, an attacker could take control of the affected
system. An attacker could then install programs; view,
change, or delete data; or create new accounts with full
user rights. (CVE-2020-0906)");
# https://support.microsoft.com/en-us/help/4484283/security-update-for-excel-2013-april-14-2020
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a9f68ebb");
# https://support.microsoft.com/en-us/help/4484273/security-update-for-excel-2016-april-14-2020
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?723b63ab");
# https://support.microsoft.com/en-us/help/4484285/security-update-for-excel-2010-april-14-2020
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?771d8248");
script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
-KB4484283
-KB4484273
-KB4484285
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:N/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-2020-0979");
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:"2020/04/14");
script_set_attribute(attribute:"patch_publication_date", value:"2020/04/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/14");
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:"II");
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('audit.inc');
include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('install_func.inc');
global_var vuln;
get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
bulletin = 'MS20-04';
kbs = make_list(
'4484283',
'4484273',
'4484285'
);
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', '14.0.7248.5000', 'kb', '4484285'),
'15.0', make_array('sp', 1, 'version', '15.0.5233.1000', 'kb', '4484283'),
'16.0', make_nested_list(
make_array('sp', 0, 'version', '16.0.4993.1001', 'channel', 'MSI', 'kb', '4484273'))
);
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');
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
93.6%