4.6 Medium
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
6.7 Medium
AI Score
Confidence
Low
0.0004 Low
EPSS
Percentile
5.2%
A vulnerability in the Command Line Interface (CLI) parser of
Cisco Nexus Operating System (NX-OS) devices could allow an authenticated, local attacker to
perform a privilege escalation.
# Copyright (C) 2016 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("1.3.6.1.4.1.25623.1.0.105701");
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:"2016-05-12 16:15:38 +0200 (Thu, 12 May 2016)");
script_tag(name:"cvss_base", value:"4.6");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
script_cve_id("CVE-2015-4237");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Cisco Nexus Operating System Devices Command Line Interface Local Privilege Escalation Vulnerability (Cisco-SA-20150701-CVE-2015-4237)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2016 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 Command Line Interface (CLI) parser of
Cisco Nexus Operating System (NX-OS) devices could allow an authenticated, local attacker to
perform a privilege escalation.");
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 input validation of
special characters within filenames. An attacker could exploit this vulnerability by
authenticating at the local shell and writing a file to disk with certain special characters. The
attacker could then use that file with other CLI commands to obtain a shell prompt at their
current privilege level.");
script_tag(name:"impact", value:"An exploit could allow the attacker to read and write files and
perform other privileged commands.");
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-20150701-CVE-2015-4237");
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( ! version = get_app_version( cpe:CPE, nofork:TRUE ) )
exit( 0 );
if( nx_model =~ "^C?3[0-9]+" ) {
affected = make_list( "7.2(0)ZZ(99.1)" );
}
if( nx_model =~ "^C?4[0-9]+" ) {
affected = make_list( "4.1(2)E1(1)" );
}
if( nx_model =~ "^C?5[0-9]+" ) {
affected = make_list( "7.2(0)ZZ(99.1)" );
}
if( nx_model =~ "^C?7[0-9]+" ) {
affected = make_list( "6.2(12)" );
}
if( nx_model =~ "^C?9[0-9]{3}" ) {
affected = make_list( "7.2(0)ZZ(99.3)" );
}
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 );