CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AI Score
Confidence
High
EPSS
Percentile
60.3%
A vulnerability in the remote login functionality for Cisco
NX-OS Software running on Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote
attacker to cause a process used for login to terminate unexpectedly and the login attempt to
fail. There is no impact to user traffic flowing through the device. The attacker could use
either a Telnet or an SSH client for the remote login attempt.
# Copyright (C) 2017 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:cisco:nx-os";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.106658");
script_version("2022-12-26T10:12:01+0000");
script_tag(name:"last_modification", value:"2022-12-26 10:12:01 +0000 (Mon, 26 Dec 2022)");
script_tag(name:"creation_date", value:"2017-03-16 11:41:10 +0700 (Thu, 16 Mar 2017)");
script_tag(name:"cvss_base", value:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2017-07-12 01:29:00 +0000 (Wed, 12 Jul 2017)");
script_cve_id("CVE-2017-3879");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Cisco Nexus 9000 Series Switches Remote Login Denial of Service Vulnerability (cisco-sa-20170315-nss1)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
script_family("CISCO");
script_dependencies("gb_cisco_nx_os_consolidation.nasl");
script_mandatory_keys("cisco/nx_os/detected", "cisco/nx_os/device", "cisco/nx_os/model");
script_tag(name:"summary", value:"A vulnerability in the remote login functionality for Cisco
NX-OS Software running on Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote
attacker to cause a process used for login to terminate unexpectedly and the login attempt to
fail. There is no impact to user traffic flowing through the device. The attacker could use
either a Telnet or an SSH client for the remote login attempt.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The vulnerability is due to improper handling of failed
authentication during login. An attacker could exploit this vulnerability by attempting to log in
remotely to the device.");
script_tag(name:"impact", value:"An exploit could allow the attacker to cause a login process to
terminate unexpectedly.");
script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");
script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-nss1");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if (!device = get_kb_item("cisco/nx_os/device"))
exit(0);
if ("Nexus" >!< device)
exit(0);
if (!nx_model = get_kb_item("cisco/nx_os/model"))
exit(0);
if (nx_model !~ "^C?[0-9]{3}")
exit(0);
if (!version = get_app_version(cpe: CPE, nofork: TRUE))
exit(0);
affected = make_list(
"7.0(3)I3(1)",
"8.3(0)CV(0.342)",
"8.3(0)CV(0.345)");
foreach af (affected) {
if (version == af) {
report = report_fixed_ver(installed_version: version, fixed_version: "See advisory");
security_message(port: 0, data: report);
exit(0);
}
}
exit(99);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AI Score
Confidence
High
EPSS
Percentile
60.3%