CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
29.3%
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(134376);
script_version("1.9");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/06");
script_cve_id("CVE-2020-0903");
script_xref(name:"MSKB", value:"4540123");
script_xref(name:"MSFT", value:"MS20-4540123");
script_xref(name:"IAVA", value:"2020-A-0090-S");
script_name(english:"Security Updates for Exchange (March 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 cross-site-scripting (XSS) vulnerability exists when
Microsoft Exchange Server does not properly sanitize a
specially crafted web request to an affected Exchange
server. An authenticated attacker could exploit the
vulnerability by sending a specially crafted request to
an affected server. The attacker who successfully
exploited the vulnerability could then perform cross-
site scripting attacks on affected systems and run
script in the security context of the current user. The
attacks could allow the attacker to read content that
the attacker is not authorized to read, use the victim's
identity to take actions on the Exchange server on
behalf of the user, such as change permissions and
delete content, and inject malicious content in the
browser of the user. The security update addresses the
vulnerability by helping to ensure that Exchange Server
properly sanitizes web requests. (CVE-2020-0903)");
# https://support.microsoft.com/en-us/help/4540123/security-update-for-exchange-server-2019-and-2016
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1c6ea048");
script_set_attribute(attribute:"solution", value:
"Microsoft has released KB4540123 to address this issue.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
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:L/UI:R/S:C/C:L/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-0903");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/10");
script_set_attribute(attribute:"patch_publication_date", value:"2020/03/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/10");
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': 13,
'cu' : 14,
'min_version': '15.01.1847.0',
'fixed_version': '15.01.1847.10',
'kb': '4540123'
},
{
'product' : '2016',
'unsupported_cu' : 13,
'cu' : 15,
'min_version': '15.01.1913.0',
'fixed_version': '15.01.1913.10',
'kb': '4540123'
},
{
'product' : '2019',
'unsupported_cu' : 2,
'cu' : 3,
'min_version': '15.02.464.0',
'fixed_version': '15.02.464.14',
'kb': '4540123'
},
{
'product' : '2019',
'unsupported_cu' : 2,
'cu' : 4,
'min_version': '15.02.529.0',
'fixed_version': '15.02.529.11',
'kb': '4540123'
}
];
vcf::microsoft::exchange::check_version_and_report
(
app_info:app_info,
bulletin:'MS20-03',
constraints:constraints,
severity:SECURITY_NOTE
);
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
29.3%