9 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
8.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
8 High
AI Score
Confidence
High
0.422 Medium
EPSS
Percentile
97.3%
The Microsoft Exchange Server installed on the remote host is missing a security update. It is, therefore, affected by the following vulnerability :
#%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(140427);
script_version("1.11");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/06");
script_cve_id("CVE-2020-16875");
script_xref(name:"MSKB", value:"4577352");
script_xref(name:"MSFT", value:"MS20-4577352");
script_xref(name:"IAVA", value:"2020-A-0413-S");
script_xref(name:"CEA-ID", value:"CEA-2020-0118");
script_name(english:"Security Updates for Exchange (September 2020)");
script_set_attribute(attribute:"synopsis", value:
"The Microsoft Exchange Server installed on the remote host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The Microsoft Exchange Server installed on the remote host
is missing a security update. It is, therefore, affected by
the following vulnerability :
- A remote code execution vulnerability exists in
Microsoft Exchange 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 System user. An
attacker could then install programs; view, change, or
delete data; or create new accounts. Exploitation of the
vulnerability requires that a specially crafted email be
sent to a vulnerable Exchange server. The security
update addresses the vulnerability by correcting how
Microsoft Exchange handles objects in memory.
(CVE-2020-16875)");
# https://support.microsoft.com/en-us/help/4577352/security-update-for-exchange-server-2019-and-2016
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9455d8ba");
script_set_attribute(attribute:"solution", value:
"Microsoft has released KB4577352 to address this issue.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
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:H/UI:R/S:C/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-2020-16875");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Microsoft Exchange Server DlpUtils AddTenantDlpPolicy RCE');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/09/08");
script_set_attribute(attribute:"patch_publication_date", value:"2020/09/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:exchange_server:2016");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:exchange_server:2019");
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) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ms_bulletin_checks_possible.nasl", "microsoft_exchange_installed.nbin");
script_require_keys("SMB/MS_Bulletin_Checks/Possible");
script_require_ports(139, 445, "Host/patch_management_checks");
exit(0);
}
include('vcf_extras_microsoft.inc');
var app_info = vcf::microsoft::exchange::get_app_info();
var constraints =
[
{
'product': '2016',
'unsupported_cu': 15,
'cu' : 16,
'min_version': '15.01.1979.0',
'fixed_version': '15.01.1979.6',
'kb': '4577352'
},
{
'product' : '2016',
'unsupported_cu' : 15,
'cu' : 17,
'min_version': '15.01.2044.0',
'fixed_version': '15.01.2044.6',
'kb': '4577352'
},
{
'product' : '2019',
'unsupported_cu' : 4,
'cu' : 5,
'min_version': '15.02.595.0',
'fixed_version': '15.02.595.6',
'kb': '4577352'
},
{
'product' : '2019',
'unsupported_cu' : 4,
'cu' : 6,
'min_version': '15.02.659.0',
'fixed_version': '15.02.659.6',
'kb': '4577352'
}
];
vcf::microsoft::exchange::check_version_and_report
(
app_info:app_info,
bulletin:'MS20-09',
constraints:constraints,
severity:SECURITY_HOLE
);
Vendor | Product | Version | CPE |
---|---|---|---|
microsoft | exchange_server | 2016 | cpe:/a:microsoft:exchange_server:2016 |
microsoft | exchange_server | 2019 | cpe:/a:microsoft:exchange_server:2019 |
9 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
8.4 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
8 High
AI Score
Confidence
High
0.422 Medium
EPSS
Percentile
97.3%