CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
57.1%
MikroTik RouterOS is prone to a denial of service (DoS)
vulnerability.
# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
CPE = "cpe:/o:mikrotik:routeros";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.146342");
script_version("2022-08-08T10:24:51+0000");
script_tag(name:"last_modification", value:"2022-08-08 10:24:51 +0000 (Mon, 08 Aug 2022)");
script_tag(name:"creation_date", value:"2021-07-21 06:41:16 +0000 (Wed, 21 Jul 2021)");
script_tag(name:"cvss_base", value:"4.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-07-20 23:32:00 +0000 (Tue, 20 Jul 2021)");
script_cve_id("CVE-2020-20231");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"WillNotFix");
script_name("MikroTik RouterOS <= 6.48.6 DoS Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
script_family("Denial of Service");
script_dependencies("gb_mikrotik_router_routeros_consolidation.nasl");
script_mandatory_keys("mikrotik/detected");
script_tag(name:"summary", value:"MikroTik RouterOS is prone to a denial of service (DoS)
vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"Mikrotik RouterOs suffers from a memory corruption vulnerability
in the /nova/bin/detnet process. An authenticated remote attacker can cause a Denial of Service
(NULL pointer dereference).");
script_tag(name:"affected", value:"MikroTik RouterOS version 6.48.3 and prior.");
script_tag(name:"solution", value:"No known solution was made available for at least one year since
the disclosure of this vulnerability. Likely none will be provided anymore. General solution options
are to upgrade to a newer release, disable respective features, remove the product or replace the
product by another one.");
script_xref(name:"URL", value:"https://github.com/cq674350529/pocs_slides/blob/master/advisory/MikroTik/CVE-2020-20231/README.md");
script_xref(name:"URL", value:"https://mikrotik.com/download/changelogs/long-term-release-tree");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if (!version = get_app_version(cpe: CPE, nofork: TRUE))
exit(0);
if (version_is_less_equal(version: version, test_version: "6.48.3")) {
report = report_fixed_ver(installed_version: version, fixed_version: "None");
security_message(port: 0, data: report);
exit(0);
}
exit(0);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
57.1%